Prime BlackEdition 85 Carbon Road RimEnabling you to reach top speeds without maxing out your energy, this excellent BlackEdition rim is an essential for the velocity-focused road racer. Comprising of a stiff and responsive carbon-construction, this 85mm deep hoop slices through the air with the greatest of ease, cutting your times and racking up your personal bests in the process. Deep Section Carbon RimDurable, dependable and designed for use with rim brakes, it features a 27.5mm width, ideal for making a steady and consistent surface contact with the road as you leave the competition in your dust. Tubeless ready, it can be adapted with different tyres to ensure a speedier and grippier performance all the way to the podium. Features Material: T700 Unidirectional Carbon Fibre Rim Dimensions: Profile: 85mm; Internal Width: 19mm; External Width: 27.5mm Spoke Holes: Front: 20; Rear: 24 Braking Surface: Carbon Tubeless Ready: Yes Weight: 700gBuy Prime Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
Sector GCa Gravel RimWhether you're taking the long road home or planning a countryside adventure with your friends, this versatile gravel rim is engineered for maximum performance. It features a hard-wearing aluminium rim construction, which makes it more than capable of handling all the intensity that comes with exploring new and unpredictable roads. Sector has also equipped this model with a 23mm internal width that's optimised for 30mm to 50mm tyres. The rim is both pinned and welded making it incredibly strong, and combining this with the wide profile, will withstand punishing 'Cross courses, all day Gravel epics or your next bike-packing adventure. The GCa is available in both 700c and 650b options. Features: Rim Material: 6061 T-10 Aluminium Use: Gravel, Adventure and Cyclo-crossRim Size: 700c & 650b options availableRim Depth: N/ARim Width: (Internal) 23mm; (External) 28mmHoles: 28hTubeless: YesSingle or Pair: SingleBuy Sector Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
Sector GCa Gravel RimWhether you're taking the long road home or planning a countryside adventure with your friends, this versatile gravel rim is engineered for maximum performance. It features a hard-wearing aluminium rim construction, which makes it more than capable of handling all the intensity that comes with exploring new and unpredictable roads. Sector has also equipped this model with a 23mm internal width that's optimised for 30mm to 50mm tyres. The rim is both pinned and welded making it incredibly strong, and combining this with the wide profile, will withstand punishing 'Cross courses, all day Gravel epics or your next bike-packing adventure. The GCa is available in both 700c and 650b options. Features: Rim Material: 6061 T-10 Aluminium Use: Gravel, Adventure and Cyclo-crossRim Size: 700c & 650b options availableRim Depth: N/ARim Width: (Internal) 23mm; (External) 28mmHoles: 28hTubeless: YesSingle or Pair: SingleBuy Sector Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
Sector R26 Road RimThis road bike rim features a robust aluminium construction, which makes it perfect at handling all the intensity that comes with road cycling. Sector has also put this model through a heat-treatment process for extra durability. Coming equipped with a tubeless-ready rim profile and a 19.5mm internal width, this model is optimised for use with 23mm to 36mm tyres. The Kinesis R26 rim profile at 26mm deep is aerodynamic whilst retaining a low weight. This road bike rim is both pinned and welded making it incredibly strong, and combining this with a wider road tyre, makes the R26 the perfect Wheelset for epic road rides, bike-packing adventures and the worst of our UK roads. Features: Rim Material: 6061 T-10 Aluminium Use: RoadRim Depth: 26mmRim Width: (Internal) 19.5mm; (External) 23mmHoles: 28hRim Size: 700cTubeless: YesSingle or Pair: SingleWeight: 460gBuy Sector Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
Sector 7i Carbon Front Mountain Bike RimEngineered for the toughest off-road rides, this front MTB rim features a robust carbon fibre construction. This makes it incredibly robust as you weave between the trails at speed, as it handles all the knocks and bumps associated with all-day epics with ease. Sector has equipped this model with their ground-breaking Innegra Technology, which is added to the carbon layup and significantly enhances its strength and compliance as well as reduces its weight. When using this rim it is like having an extra shield of armour protecting it from the biggest of hits on your mountain bike adventures.Redefining Carbon WheelsRide without fear - thanks to the addition of TeXtreme Innegra into the layup of Sector's rims, they've developed a rim that has 75% higher impact resistance than standard Carbon Rims of the same profile. The 7i Rims are significantly more resistant to wear and tear and less prone to catastrophic failure.Sector's Innegra equipped 7i Rims also have 50% more vertical compliance than standard Carbon Rim. As a result they exhibit high energy absorption and superior vibration damping, with none of harsh stiffness associated with Carbon. These are Carbon Rims that have the sought-after ride characteristic of a premium alloy Wheelset.Durable Doesn't Have to Mean HeavyAt just 398g each, 7i is a lightweight, reactive and durable 650b Rim that can handle a beating. Now you can forget about protecting your rims and concentrate on finding your flow in challenging trail conditions. Please Note: These Rims are front and rear specific. Due to different spoke bracing angles of front and rear wheels, the drilling angle differs between front and rear rims. If buying a set please order one front and one rear rim. Features: Rim Material: T-700 Unidirectional Carbon Fibre, Outer layer: TeXtreme Plain Weave Spread Tow Carbon Fibre and Innegra S Hybrid Use: MTB Rim Size: 27.5" Holes: 32h Rim Width: (Internal) 29mm; (External) 35mm Rim Depth: 25mm ERD: 559mm Tubeless: Yes Single or Pair: Single Weight: 398gBuy Sector Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
Sector 9i Carbon Front Mountain Bike RimReady for shredding the trails with your friends as well as exploring new off-road routes on your own, this carbon MTB rim is engineered for maximum performance. It features a hard-wearing unidirectional carbon fibre rim construction, which allows you to benefit from its fantastic strength without adding any unnecessary weight to your ride. Sector has taken this model's design a step further by also integrating TeXtreme Innegra into the layup of the rims. This gives it 75% more impact resistance than standard carbon rims of the same profile. The 9i MTB rim is significantly more resistant to wear and tear and less prone to catastrophic failure.So what is Innegra?Innegra is a fibre derived from polypropylene that exhibits some highly beneficial properties, including high strength-to-weight ratio, resistance to damage, vibration damping and energy dissipation. The TexTreme fabric used in the layup of 9i rim is a Spread Tow fabric built from a hybrid of Innegra and T700 carbon fibres.The Spread Tow layout is significant because it also contributes some positive attributes - the fibres are straighter (reduced crimp therefore higher strength) and it facilitates the use of less resin (lower weight). In the 9i rim the Spread Tow fabric is used on the outer layer of the rim, giving it the unique checkerboard pattern.Sounds good, but what does that mean for a rim? Significantly more compliance... Under a lab test the 9i rim was 50% more vertically compliant than a unidirectional T700 carbon rim of the same profile. This test involves loading the rim with a 100kg weight, in which the 9i rim exhibited a deflection of 15.74mm compared to 10.55mm on the standard T700 rim. It is widely acknowledged that vertical compliance is important for damage reduction (less likely to crack), a reduction of fatigue and to improve traction. Such an improvement in vertical compliance also brings a radically improved ride quality to the 9i wheelset.The Innegra equipped rims do not have the associated harsh stiffness of regular carbon wheels. Significantly more impact resistance... In the lab the 9i rim was able to handle impacts of almost double the standard required for MTB wheels by the UCI. The 9i rim withstood an impact of 140J compared the UCI stipulated requirement of an 80J impact, making it 75% stronger than the UCI requirements.In real world terms, the 9i rim can handle the equivalent of dropping a 15kg weight from a height of up to 1.08 metres onto the bare rim, thus making it 18% stronger than a recognised leading competitor who has published their data. Much less weight... Despite offering strength and compliance advantages, the use of Innegra also allows the construction of an extremely lightweight rim. The Innegra equipped 9i rim weighs just 428g (29”).Features: Rim Material: T-700 Unidirectional Carbon Fibre; Outer layer: TeXtreme Plain Weave Spread Tow Carbon Fibre and Innegra S Hybrid Use: MTB Rim Size: 29" Holes: 28h or 32h options Rim Width: (Internal) 29mm; (External) 35mm Rim Depth: 25mm ERD: 591mm Tubeless: Yes Single or Pair: Single Weight: 428gBuy Sector Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
Spank OOZY Trail 395+ Mountain Bike Disc RimFinally, an ultra-wide alloy rim with Trail weight and true All Mountain strength! Spank Industries' Oozy Trail 395+ rims were designed to optimise the performance of both plus-size and modern "high volume" standard tyres. The Oozy Trail 395+ rim's 35mm internal width is the perfect solution for riders seeking an ultra-wide aggressive Trail rim that doesn't tip the scales. Combining Spank's proprietary Dynamal alloy, patented Oohbah profile, and Bead Bite tubeless rim hooks, The Oozy Trail 395+ offers the perfect blend of strength and stiffness with unparalleled tubeless performance. You don't have to go fat to go ultra-wide with the OOZY Trail 395+ rim.Features:Material: MGR Dynamal Alloy ERD: 27.5": 554mm; 29": 591mm ETRTO: 27.5": 584x35mm; 29": 622x35mm Hole Count: 32h Inner Width: 35mm Outer Width: 39.5mm Valve: Presta Tubeless: Tubeless ready Finish: Shotpeen anodised with laser etched logos Discipline: Trail Weight: 27.5": 560g; 29": 590g Technologies:Bead Bite (Anti Burp Technology): Running tubeless? No stress! At an incredible range of pressures, Bead Bite is the solution to keeping those tyres burp free and fixed in place. Bead Bite rim technology, paired with Spank‘s patented OohBah profile, enhances tubeless use with tyres of all types and with a greater range of air pressures.Bead Bite rims have 6 rows of tiny ridges that run along the vertical and horizontal faces of the bead seats. These tiny teeth create air seals between the rim and tyre as the bead conforms into them under air pressure. They dramatically increase frictional forces on the tyre bead, reducing the bead‘s ability to move vertically or horizontally (thus improving tyre stability and reducing burps). The bead literally becomes trapped between the vertical and horizontal ridges, even at very low air pressures. Even in tubed applications, Bead Bite rims tend to allow much lower air pressures with a reduced risk of pinch flats.OohBah (Reverse Well Design): The unique OohBah profile allows Spank to manufacture thinner walled, wider profiled, lighter rims without sacrificing strength or rigidity. Wider rims mean stiffer wheels and more tyre spread, leading to greater traction and improved comfort, and tyre performance. The “wave” shape of the OohBah inner tube adds strength and support to the vertical rim flange walls and prevents buckling. Normal straight or curved tube wells must be much thicker, and by default heavier, to offer the same support.BeadNip (Improved Tyre Fit): Another secret of Spank’s patented OohBah profile is our double BeadNip technology. The OohBah patent includes the addition of a second set of “nips” on the inner tube well, which ensures that the tyre always remains in the bead-seat, even when riding at minimal air pressures. With Spank’s OohBah patented rims, you can ride the tyres you want, at the pressure you want, on any terrain with far less fear of flats!Dynamal Alloy: Utilising the endless lifecycle of aluminion, Spank's proprietary alloy blends offer superior mechanical properties resulting in stronger rims and reduced weight through optimised design. Spank Industries has made a concerted effort to develop safe and affordable alternatives to the excessive use of carbon fibre in the bicycle manufacturing industry. Its WC DH Race Teams and most hardcore Big Mountain Freeriders are running Spank’s Dynamal Alloy rims in the choice against carbon fibre. Unlike standard recycled alloy mixes, Dynamal is a dynamically aged, highly magnesium-silicon enriched, pure alloy, which is blended with a special “secret” hardening metal. Compared to statically aged traditional alloy types, Dynamal shows a significant further increase in ultimate tensile strength and yield, without the normal reductions in fatigue life.MGR (Micro Grain Refinement Processed Alloys): Micro Grain Refinement Processes such as extrusion, forging and tube drawing can increase the strength of alloy materials by reducing the grain size. Spank uses state of the art proprietary metal forming methods, which further improve grain size, consistency and orientation, beyond that of our competitors. No other bars or rims are subjected to the number of drawing steps or level of refinement as those offered by Spank. This leads to greater ultimate strength, toughness, and ductility meaning confidence, comfort and safety.Buy Spank Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
Spank OOZY Trail 395+ Mountain Bike Disc RimFinally, an ultra-wide alloy rim with Trail weight and true All Mountain strength! Spank Industries' Oozy Trail 395+ rims were designed to optimise the performance of both plus-size and modern "high volume" standard tyres. The Oozy Trail 395+ rim's 35mm internal width is the perfect solution for riders seeking an ultra-wide aggressive Trail rim that doesn't tip the scales. Combining Spank's proprietary Dynamal alloy, patented Oohbah profile, and Bead Bite tubeless rim hooks, The Oozy Trail 395+ offers the perfect blend of strength and stiffness with unparalleled tubeless performance. You don't have to go fat to go ultra-wide with the OOZY Trail 395+ rim.Features:Material: MGR Dynamal Alloy ERD: 27.5": 554mm; 29": 591mm ETRTO: 27.5": 584x35mm; 29": 622x35mm Hole Count: 32h Inner Width: 35mm Outer Width: 39.5mm Valve: Presta Tubeless: Tubeless ready Finish: Shotpeen anodised with laser etched logos Discipline: Trail Weight: 27.5": 560g; 29": 590g Technologies:Bead Bite (Anti Burp Technology): Running tubeless? No stress! At an incredible range of pressures, Bead Bite is the solution to keeping those tyres burp free and fixed in place. Bead Bite rim technology, paired with Spank‘s patented OohBah profile, enhances tubeless use with tyres of all types and with a greater range of air pressures.Bead Bite rims have 6 rows of tiny ridges that run along the vertical and horizontal faces of the bead seats. These tiny teeth create air seals between the rim and tyre as the bead conforms into them under air pressure. They dramatically increase frictional forces on the tyre bead, reducing the bead‘s ability to move vertically or horizontally (thus improving tyre stability and reducing burps). The bead literally becomes trapped between the vertical and horizontal ridges, even at very low air pressures. Even in tubed applications, Bead Bite rims tend to allow much lower air pressures with a reduced risk of pinch flats.OohBah (Reverse Well Design): The unique OohBah profile allows Spank to manufacture thinner walled, wider profiled, lighter rims without sacrificing strength or rigidity. Wider rims mean stiffer wheels and more tyre spread, leading to greater traction and improved comfort, and tyre performance. The “wave” shape of the OohBah inner tube adds strength and support to the vertical rim flange walls and prevents buckling. Normal straight or curved tube wells must be much thicker, and by default heavier, to offer the same support.BeadNip (Improved Tyre Fit): Another secret of Spank’s patented OohBah profile is our double BeadNip technology. The OohBah patent includes the addition of a second set of “nips” on the inner tube well, which ensures that the tyre always remains in the bead-seat, even when riding at minimal air pressures. With Spank’s OohBah patented rims, you can ride the tyres you want, at the pressure you want, on any terrain with far less fear of flats!Dynamal Alloy: Utilising the endless lifecycle of aluminion, Spank's proprietary alloy blends offer superior mechanical properties resulting in stronger rims and reduced weight through optimised design. Spank Industries has made a concerted effort to develop safe and affordable alternatives to the excessive use of carbon fibre in the bicycle manufacturing industry. Its WC DH Race Teams and most hardcore Big Mountain Freeriders are running Spank’s Dynamal Alloy rims in the choice against carbon fibre. Unlike standard recycled alloy mixes, Dynamal is a dynamically aged, highly magnesium-silicon enriched, pure alloy, which is blended with a special “secret” hardening metal. Compared to statically aged traditional alloy types, Dynamal shows a significant further increase in ultimate tensile strength and yield, without the normal reductions in fatigue life.MGR (Micro Grain Refinement Processed Alloys): Micro Grain Refinement Processes such as extrusion, forging and tube drawing can increase the strength of alloy materials by reducing the grain size. Spank uses state of the art proprietary metal forming methods, which further improve grain size, consistency and orientation, beyond that of our competitors. No other bars or rims are subjected to the number of drawing steps or level of refinement as those offered by Spank. This leads to greater ultimate strength, toughness, and ductility meaning confidence, comfort and safety.Buy Spank Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
Spank Spike Race 33 Bead Bite MTB RimOne of the strongest but also lightest downhill (DH) models on the market, the Spike Race 33 Bead Bite mountain bike (MTB) Rim benefits from Spank’s OohBah inverted inner wall technology. This means you can enjoy bombproof durability as you’re landing huge jumps and drops, plus reliable air retention as you dive into the trail’s berms and blast over the roughest sections. This stiff and responsive rim is ideal for both DH and enduro riding, making it the ideal choice for your race-ready custom wheel build.Features: Material: MGR Dynamal Alloy Inner Width: 28mm Outer Width: 34.5mm Brake Compatibility: Disc brake only Spoke Hole Count: 32H Effective Rim Diameter (ERD): 528mm (26"), 553mm (27.5") ETRTO: 26": 559x28mm; 27.5" (650b): 584x28mm Tubeless Compatible: No Use: Enduro, Downhill (DH) Valve Compatibility: Presta Valve Technologies: Bead Bite anti-burp, OohBah Inverted Inner Wall, Dynamal Alloy, Enduro and DH Race optimised Micro-peen anodised finish Bead bite rim hook system Sold individually Weight: 26": 480g; 27.5" (650b): 500gTechnologies: Oohbah: The Oohbah technology is a unique feature found on Spank rims and wheels. The central section of the rim is traditionally slightly curved or flat on most rims, but the Oohbah design features a wave-like pattern in the centre. The Oohbah feature in the centre of the rim adds exceptional strength and makes it more rigid, traits commonly only found much heavier wheels. This structural benefit also allows Spank to make wider rims without having to add extra material, which would add weight to them BeadBite: The BeadBite technology has a serrated surface on the inside of the rim bead. This gives the tyre bead something to bite into, creating a tighter seal and reducing the chances of tyre burp.Buy Spank Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
Spank Spike Race 33 Bead Bite MTB RimOne of the strongest but also lightest downhill (DH) models on the market, the Spike Race 33 Bead Bite mountain bike (MTB) Rim benefits from Spank’s OohBah inverted inner wall technology. This means you can enjoy bombproof durability as you’re landing huge jumps and drops, plus reliable air retention as you dive into the trail’s berms and blast over the roughest sections. This stiff and responsive rim is ideal for both DH and enduro riding, making it the ideal choice for your race-ready custom wheel build.Features: Material: MGR Dynamal Alloy Inner Width: 28mm Outer Width: 34.5mm Brake Compatibility: Disc brake only Spoke Hole Count: 32H Effective Rim Diameter (ERD): 528mm (26"), 553mm (27.5") ETRTO: 26": 559x28mm; 27.5" (650b): 584x28mm Tubeless Compatible: No Use: Enduro, Downhill (DH) Valve Compatibility: Presta Valve Technologies: Bead Bite anti-burp, OohBah Inverted Inner Wall, Dynamal Alloy, Enduro and DH Race optimised Micro-peen anodised finish Bead bite rim hook system Sold individually Weight: 26": 480g; 27.5" (650b): 500gTechnologies: Oohbah: The Oohbah technology is a unique feature found on Spank rims and wheels. The central section of the rim is traditionally slightly curved or flat on most rims, but the Oohbah design features a wave-like pattern in the centre. The Oohbah feature in the centre of the rim adds exceptional strength and makes it more rigid, traits commonly only found much heavier wheels. This structural benefit also allows Spank to make wider rims without having to add extra material, which would add weight to them BeadBite: The BeadBite technology has a serrated surface on the inside of the rim bead. This gives the tyre bead something to bite into, creating a tighter seal and reducing the chances of tyre burp.Buy Spank Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
Spank 350 Mountain Bike RimThis sturdy and durable rim has been designed to tackle rough MTB (mountain bike) and Enduro trails. It features a wide profile for incredible lightweight when zipping around the corners and offers a solid, hard-wearing construction that is ready for whatever challenge you meet on the trail. Lightweight and Adaptable Tubeless Ready RimA brilliant tubeless ready rim that can cope with a variety of riding styles and under-wheel conditions, the Spank 350 Mountain Bike Rim is built to be ridden hard. Featuring a 30.5mm inner width, tyres from 2.0"-2.6" and + sized tyres can be fitted to it, making it suitable for whatever type of ride you want to undertake. Being a wider rim, it doesn't suffer from the additional weight that many larger rims have, keeping it light for ultimate speed on the descent and for making your climbs that little bit easier. The width also combines with the low sectional profile height to give radial compliance and top-notch lateral stiffness, giving you precise control and confidence as you fight to the finish line.Features:Material: Top-Performance AlloyInner Width: 30.5mmOuter Width: 35mmHole Count: 32Valve: F/V PrestaTubeless: Tubeless ReadyTechnologies: Radial Compliance, BeadBite, OohBah Inverted Inner WallWeight: 27.5": 465g (approx); 29." 495g (approx)Technologies: Bead Bite: At an incredible range of pressures, Bead Bite is the solution to keeping your tires burp free and fixed in place. Bead Bite rim technology enhances tubeless use with tires of all types and with a greater range of air pressures. Bead Bite rims have 6 rows of tiny ridges that run along with the vertical and horizontal faces of the bead seats. These tiny teeth create air seals between the rim and tire as the bead conforms into them under air pressure. They dramatically increase frictional forces on the tire bead, reducing the beads' ability to move vertically or horizontally (thus improving tire stability and reducing burps). The bead literally becomes trapped between the vertical and horizontal ridges, even at very low air pressures. Even in tubed applications, Bead Bite rims tend to allow much lower air pressures with reduced risk of pinch flats. Oohbah: The unique OohBah profile allows Spank to manufacture thinner walled, wider profiled, lighter rims without sacrificing strength or rigidity. Wider rims mean stiffer wheels and more tire spread, leading to greater traction and improved comfort, and tire performance. The "wave" shape of the OohBah inner tube adds strength and support to the vertical rim flange walls and prevent buckling. Normal straight or curved tube wells must be much thicker, and by default heavier, to offer the same support.Buy Spank Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
Spank 350 Mountain Bike RimThis sturdy and durable rim has been designed to tackle rough MTB (mountain bike) and Enduro trails. It features a wide profile for incredible lightweight when zipping around the corners and offers a solid, hard-wearing construction that is ready for whatever challenge you meet on the trail. Lightweight and Adaptable Tubeless Ready RimA brilliant tubeless ready rim that can cope with a variety of riding styles and under-wheel conditions, the Spank 350 Mountain Bike Rim is built to be ridden hard. Featuring a 30.5mm inner width, tyres from 2.0"-2.6" and + sized tyres can be fitted to it, making it suitable for whatever type of ride you want to undertake. Being a wider rim, it doesn't suffer from the additional weight that many larger rims have, keeping it light for ultimate speed on the descent and for making your climbs that little bit easier. The width also combines with the low sectional profile height to give radial compliance and top-notch lateral stiffness, giving you precise control and confidence as you fight to the finish line.Features:Material: Top-Performance AlloyInner Width: 30.5mmOuter Width: 35mmHole Count: 32Valve: F/V PrestaTubeless: Tubeless ReadyTechnologies: Radial Compliance, BeadBite, OohBah Inverted Inner WallWeight: 27.5": 465g (approx); 29." 495g (approx)Technologies: Bead Bite: At an incredible range of pressures, Bead Bite is the solution to keeping your tires burp free and fixed in place. Bead Bite rim technology enhances tubeless use with tires of all types and with a greater range of air pressures. Bead Bite rims have 6 rows of tiny ridges that run along with the vertical and horizontal faces of the bead seats. These tiny teeth create air seals between the rim and tire as the bead conforms into them under air pressure. They dramatically increase frictional forces on the tire bead, reducing the beads' ability to move vertically or horizontally (thus improving tire stability and reducing burps). The bead literally becomes trapped between the vertical and horizontal ridges, even at very low air pressures. Even in tubed applications, Bead Bite rims tend to allow much lower air pressures with reduced risk of pinch flats. Oohbah: The unique OohBah profile allows Spank to manufacture thinner walled, wider profiled, lighter rims without sacrificing strength or rigidity. Wider rims mean stiffer wheels and more tire spread, leading to greater traction and improved comfort, and tire performance. The "wave" shape of the OohBah inner tube adds strength and support to the vertical rim flange walls and prevent buckling. Normal straight or curved tube wells must be much thicker, and by default heavier, to offer the same support.Buy Spank Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.