RockShox Pike DJ Solo Air ForksThis mountain bike (MTB) suspension fork features 35mm tapered wall aluminium upper tubes, which offer a fantastic balance of strength, durability and control as you hit the trails. This is Pike DJ. It's a cousin to the award-winning Pike, which makes it look a lot like a trail fork, until you ride it. Pike DJ is built on a stout 35mm chassis and includes a custom-tuned Charger damper and specific Solo Air system designed for more bottom-out progression than you'll ever need because your trails eventually require some landings.- New graphic package for a fresh, premium look.- Proven Charger damper with specific Dirt Jumping/Slopestyle tune.- Specific Solo Air top cap for extra bottom-out progression.- Accepts Bottomless Tokens to easily custom tune the air spring performance to best match your own riding style and suspension preference.Bottomless TokensBottomless Tokens allow you to easily custom tune your air-spring performance to best match your riding style and suspension preference. Adding the easy-to-install Bottomless Tokens changes the air-spring curve to resist bottom-out after a big hit, giving aggressive riders the power to attack the trail harder. Removing Bottomless Tokens makes the air-spring curve more linear, enhancing suspension feel for certain types of terrain or trail condition and ensuring riders who are less front-end aggressive benefit from 100% of their fork's travel. Bottomless tokens available separately.Solo AirSolo Air gives you a plush, predictable ride you can set up in seconds.Features: Upper Tubes Material: 35mm tapered wall Aluminium Use: Mountain Bike (MTB) Axle Size: 15x100mm Steerer Diameter: 1 1/8-1.5" tapered Air Spring: Solo Air Damper: Charger Wheel Size: 26" Fork Offset: 40mm Rotor Size: Maximum: 220mm; Minimum: 160mm Max Tyre Width: 66mmManufacturer's Part Numbers: RSF905004 Black Gloss 26" 40mm 140mm RSF905003 Black Gloss 26" 40mm 100mmBuy RockShox Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
RockShox Rudy Ultimate XPLR Race Day ForkEngineered for modern gravel and E-gravel bike riding, this versatile suspension fork features 30mm straight wall aluminium upper tubes for maximum strength and durability on every mile. RockShox has also equipped this model with magnesium lower legs for additional stiffness, while also keeping its overall weight reduced. This means that riders will enjoy its superior strength to weight ratio wherever their next adventure takes them.Solo Air Spring and Charger Race Day DamperWhether you're wanting to explore the countryside back roads further or planning an epic weekend gravel adventure, this fork is kitted out with some of RockShox's finest technologies to make the ride comfortable, smoother and more rider-tuned. Its Solo Air spring is tuned for short travel, which makes it ideal for handling mixed terrains and mountain gravel road climbs. Another benefit is its adjustable Charger Race Day damper that provides a rock-solid lockout and a full range of rebound adjust. As a result, riders can use its external rebound and two-position (open/lock) compression to dial in their preferred settings to match their riding style as well as the terrain conditions.Versatile Gravel Bike Suspension ForkThe Rudy delivers more control, more confidence, and more fun to the emerging breed of lycra loving, or baggy wearing, gravel free spirits. This isn't a "shrink it" development story, Rudy was built from the ground up to match today's most capable gravel bikes. Going Ultimate means every detail is considered. Rudy Ultimate XPLR features the ultra-lightweight Charger Race Day damper paired with a chiselled machined and anodised crown. Versatility and style are key. That's why Rudy Ultimate XPLR features full fender compatibility, plenty of tyre clearance, and the choice of a "Kwiqsand" Signature colourway or black gloss lower leg finish available to select.- Maxima Lower Leg Performance lube reduces friction and enhances fork performance ride after ride- High performance suspension fork laser-focused on gravel/e-gravel bike- Charger Race Day damper with rock-solid lockout and full range of rebound adjust- Solo Air spring tuned for short travel- Machined and anodised crown- Black Gloss or "Kwiqsand" Signature colourway options- Full fender compatibility using custom stealth stay bosses- 2-bolt mounts to fit a short fender (RockShox fender sold separately)- Maxima Plush damping fluid reduces friction and silences damper noise- Fits up to 700x50 tyres- 30mm and 40mm travel options (available to select separately)Features: Upper Tube Material: 30mm Straight Wall Aluminium with Fast Black finish Lower Leg Material: Magnesium Lower Leg Finish: Black Gloss or Kwiqsand signature colourway options available to select separately Crown Material: Forged, machined and anodised Hollow Aluminium Use: Gravel, E-Gravel bike riding Air Spring: Solo Air Damper Type: Charger Race Day Axle: 12x100mm Steerer Diameter: 1 1/8-1.5" tapered Fork Offset: 45mm Crown OD: 50mm Axle to Crown: 435mm Damper Adjust: Crown Damping Adjustments: External rebound, 2-position compression (open/lock) Volume Reducer: 0/3 Tokens Max Tyre Diameter: 716mm Max Tyre Width: 50mm Brake Type: Direct Flat Mount Disc Maximum Rotor Size: 180mm Minimum Rotor Size: 160mm Fender Compatibility: Full or Short, 3 point and 2 point mounts Maxle Included: Maxle Stealth E-MTB Decal: No Included: Fender, Star nut, Maxle Stealth Wheel Size: 700cManufacturer's Part Numbers: 00.4020.817.000 Black Gloss 700c 40mm 00.4020.817.001 Black Gloss 700c 30mm 00.4020.817.002 Brown Kwiqsand 700c 40mm 00.4020.817.003 Brown Kwiqsand 700c 30mmBuy RockShox Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
RockShox Rudy Ultimate XPLR Race Day ForkEngineered for modern gravel and E-gravel bike riding, this versatile suspension fork features 30mm straight wall aluminium upper tubes for maximum strength and durability on every mile. RockShox has also equipped this model with magnesium lower legs for additional stiffness, while also keeping its overall weight reduced. This means that riders will enjoy its superior strength to weight ratio wherever their next adventure takes them.Solo Air Spring and Charger Race Day DamperWhether you're wanting to explore the countryside back roads further or planning an epic weekend gravel adventure, this fork is kitted out with some of RockShox's finest technologies to make the ride comfortable, smoother and more rider-tuned. Its Solo Air spring is tuned for short travel, which makes it ideal for handling mixed terrains and mountain gravel road climbs. Another benefit is its adjustable Charger Race Day damper that provides a rock-solid lockout and a full range of rebound adjust. As a result, riders can use its external rebound and two-position (open/lock) compression to dial in their preferred settings to match their riding style as well as the terrain conditions.Versatile Gravel Bike Suspension ForkThe Rudy delivers more control, more confidence, and more fun to the emerging breed of lycra loving, or baggy wearing, gravel free spirits. This isn't a "shrink it" development story, Rudy was built from the ground up to match today's most capable gravel bikes. Going Ultimate means every detail is considered. Rudy Ultimate XPLR features the ultra-lightweight Charger Race Day damper paired with a chiselled machined and anodised crown. Versatility and style are key. That's why Rudy Ultimate XPLR features full fender compatibility, plenty of tyre clearance, and the choice of a "Kwiqsand" Signature colourway or black gloss lower leg finish available to select.- Maxima Lower Leg Performance lube reduces friction and enhances fork performance ride after ride- High performance suspension fork laser-focused on gravel/e-gravel bike- Charger Race Day damper with rock-solid lockout and full range of rebound adjust- Solo Air spring tuned for short travel- Machined and anodised crown- Black Gloss or "Kwiqsand" Signature colourway options- Full fender compatibility using custom stealth stay bosses- 2-bolt mounts to fit a short fender (RockShox fender sold separately)- Maxima Plush damping fluid reduces friction and silences damper noise- Fits up to 700x50 tyres- 30mm and 40mm travel options (available to select separately)Features: Upper Tube Material: 30mm Straight Wall Aluminium with Fast Black finish Lower Leg Material: Magnesium Lower Leg Finish: Black Gloss or Kwiqsand signature colourway options available to select separately Crown Material: Forged, machined and anodised Hollow Aluminium Use: Gravel, E-Gravel bike riding Air Spring: Solo Air Damper Type: Charger Race Day Axle: 12x100mm Steerer Diameter: 1 1/8-1.5" tapered Fork Offset: 45mm Crown OD: 50mm Axle to Crown: 435mm Damper Adjust: Crown Damping Adjustments: External rebound, 2-position compression (open/lock) Volume Reducer: 0/3 Tokens Max Tyre Diameter: 716mm Max Tyre Width: 50mm Brake Type: Direct Flat Mount Disc Maximum Rotor Size: 180mm Minimum Rotor Size: 160mm Fender Compatibility: Full or Short, 3 point and 2 point mounts Maxle Included: Maxle Stealth E-MTB Decal: No Included: Fender, Star nut, Maxle Stealth Wheel Size: 700cManufacturer's Part Numbers: 00.4020.817.000 Black Gloss 700c 40mm 00.4020.817.001 Black Gloss 700c 30mm 00.4020.817.002 Brown Kwiqsand 700c 40mm 00.4020.817.003 Brown Kwiqsand 700c 30mmBuy RockShox Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
RockShox Pike Ultimate Charger 3 RC2 ForkCombining high-level damping, control and adjustability, this mountain bike (MTB) fork gives you a smoother and more refined experience as you hit the trails. Developed to be at home on any trail, this model is equipped with a 35mm chassis that's satisfyingly stiff, playful, and lightweight. Thanks to its high-quality tapered wall aluminium upper tubes and its forged, hollow aluminium crown, it provides the best balance of strength and durability, while also keeping the overall weight reduced to a minimum.Built for riders not looking to compromise on features or performance. Pike Ultimate has an updated 35mm chassis designed to be ultra-light in weight and playful in nature. Featuring the new Charger 3 RC2 damper with vibration killing ButterCup technology and all the support from the revised DebonAir+ air spring. With a new look and a long list of performance-enhancing technologies, the Pike Ultimate is here to revolutionise the trail game, again.Charger 3 RC2 Damper with ButterCupsCharger 3 features a completely new Internal Floating Piston (IFP) design with better fidelity, performance and truly independent adjustments without any "cross talk". Featuring High Speed Compression, Low Speed Compression, and a revamped Low Speed Rebound, every click is meaningful and exact. This dead silent design allows the rider to truly tune to perfection with every click. This version also has ButterCups that block 20% of high frequency “trail chatter”. Limiting these vibrations massively reduces hand and arm fatigue leaving you feeling fresh with more control.DebonAir+ Air Spring and Boost Axle SpacingDebonAir+ is built to strike the perfect balance of what riders really want: butter-like small bump feel, increased air volume to add support throughout the travel and higher overall ride height for more confidence when things get steep. This combined with this model's Boost axle spacing, makes the RockShox Pike Ultimate Charger 3 RC2 Fork fully prepared for day-long adventures on the trails.Features: Upper Tube Type Material: 35mm tapered wall Aluminium Crown Material: Forged, hollow Aluminium Use: Mountain Bike (MTB) Axle Size: 15x110mm, Boost Steerer Diameter: 1.5" tapered Fork Travel: 140mm Air Spring: DebonAir+ with ButterCups Damper Type: Charger 3 RC2 with ButterCups Damper Adjust: Crown Damping Adjustments: External begin stroke rebound, low speed compression, high speed compression Crown OD: 58mm Axle to Crown: 551mm Brake Type: Disc E-Bike Approved: Yes with E-MTB decal Lower Leg Type: Pressure Relief Valve Volume Reducer: 0/5 tokens Max Tyre Diameter: 770mm Max Tyre Width: 81mm Maximum Rotor Size: 220mm Minimum Rotor Size: 180mm Fender Compatibility: Short, 3 point mount Included: Bolt-on Fender, x2 bottom tokens, Star nut and Maxle StealthTechnologies: 35mm chassis at home on the trail - satisfyingly stiff, playful, and light, really light. ButterCups block 20% of high frequency “trail chatter”. Limiting these vibrations massively reduces hand and arm fatigue leaving you feeling fresh with more control. Charger 3 features a completely new Internal Floating Piston (IFP) design with better fidelity, performance and truly independent adjustments without any "cross talk". Featuring High Speed Compression, Low Speed Compression, and a revamped Low Speed Rebound, every click is meaningful and exact. This dead silent design allows the rider to truly tune to perfection with every click. DebonAir+ is built to strike the perfect balance of what riders really want: butter-like small bump feel, increased air volume to add support throughout the travel and higher overall ride height for more confidence when things get steep. Ultimate Bushing Package maximizes the fork's bushing overlap, reducing friction and creating the smoothest ride possible. Pressure Relief Valves eliminate unwanted air pressure build-up in the lower leg caused by variations in altitude or temperature. With the press of a button or two, Pressure Relief Valves restore premium fork feel. Maxima Plush Dynamic Suspension Lube reduces friction and enhances fork performance ride after ride. Bolt-in torque cap adapters are now included for use with standard hub end caps. Lightweight machined and anodized crown for premium looks and durability. Signature Series graphics package. RockShox premium short fender compatibility (RockShox bolt-on fender sold separately). Ultra-low friction SKF wiper seals provide long lasting fork performance and improve overall suspension feel. Maxima Plush damping fluid reduces friction and silences damper noise.Manufacturer's Part Numbers: 00.4020.697.012 Silver 29" 140mm 00.4020.697.015 Black Gloss 29" 140mmBuy RockShox Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
RockShox Lyrik UltimateCharger 3 RC2 ForkEngineered for powerful and dependable front-end suspension performance wherever the trail leads you, this mountain bike (MTB) fork combines a robust construction with industry-leading technologies. Coming equipped with 35mm tapered wall aluminium upper tubes, this model has an all mountain (AM) focused profile that's stiff, efficient and designed to eliminate as much weight as possible. RockShox has also kitted out this version with a hard-wearing aluminium crown for additional strength and durability as you charge from trail to trail.Faster. Stronger. Ruthlessly efficient. The Lyrik is up for anything and down for it all. The most versatile fork in RockShox's lineup features a hyper-focused new chassis that's lighter, while still critically stiff for Lyrik's legendary performance and party attitude. Lyrik Ultimate features the updated Charger 3 RC2 damper with vibration-killing ButterCup technology and the DebonAir+ air spring. Equipped with the ultimate package of new technologies and a fresh new signature colourway that RockShox call "Heavy Meadow", inspired by its favourite alpine suffer-fests, the Lyrik Ultimate is here.Charger 3 RC2 DamperCharger 3 features a completely new Internal Floating Piston (IFP) design with better fidelity, performance and truly independent adjustments without any "cross-talk". Featuring High Speed Compression, Low Speed Compression, and a revamped Low Speed Rebound, every click is meaningful and exact. This dead silent design allows you to truly tune to perfection with every click.DebonAir+ Air SpringDebonAir+ is built to strike the perfect balance of what riders really want: butter-like small bump feel, increased air volume to add support throughout the travel and higher overall ride height for more confidence when things get steep. This combined with this model's Boost axle spacing, makes the RockShox Lyrik UltimateCharger 3 RC2 Fork well-equipped for the most demanding of rides.Features: Upper Tube Material: 35mm tapered wall Aluminium Crown Material: Aluminium Use: Mountain Bike (MTB) E-Bike Approved: Yes Air Spring: DebonAir+ Damper Type: Charger 3 RC2 Damper Adjust: Crown Damping Adjustments: External begin stroke rebound, low speed compression and high speed compression Steerer Diameter: 1.5" tapered Axle Size: 15x110mm, Boost; Maxle Included: Maxle Stealth Fork Travel: 160mm Fork Offset: 44mm Crown OD: 59mm Axle to Crown: 571mm Brake Type: Disc Lower Leg Type: Pressure Relief Valve Volume Reducer: 0/5 Tokens Max Tyre Diameter: 770mm Max Tyre Width: 81mm Maximum Rotor Size: 220mm Minimum Rotor Size: 180mm Fender Compatibility: Short, 3 point mount Included: Bolt-On Fender, x2 bottom tokens, Star nut and Maxle StealthTechnologies: 35mm chassis with a focused all-mountain mindset - satisfyingly stiff, efficient and designed to eliminate as much weight as possible. ButterCups block 20% of high frequency “trail chatter”. Limiting these vibrations massively reduces hand and arm fatigue leaving you feeling fresh with more control. Charger 3 features a completely new Internal Floating Piston (IFP) design with better fidelity, performance and truly independent adjustments without any ""cross talk"". Featuring High Speed Compression, Low Speed Compression, and a revamped Low Speed Rebound, every click is meaningful and exact. This dead silent design allows the rider to truly tune to perfection with every click. DebonAir+ is built to strike the perfect balance of what riders really want: butter-like small bump feel, increased air volume to add support throughout the travel and higher overall ride height for more confidence when things get steep. Ultimate Bushing Package maximizes the fork's bushing overlap, reducing friction and creating the smoothest ride possible. Pressure Relief Valves eliminate unwanted air pressure build-up in the lower leg caused by variations in altitude or temperature. With the press of a button or two, Pressure Relief Valves restore premium fork feel. Maxima Plush Dynamic Suspension Lube reduces friction and enhances fork performance ride after ride. Bolt-in torque cap adapters are now included for use with standard hub end caps. Lightweight machined and anodized crown for premium looks and durability. Signature Series graphics package. RockShox premium short fender compatibility (RockShox bolt-on fender sold separately). Ultra-low friction SKF wiper seals provide long-lasting fork performance and improve overall suspension feel. Maxima Plush damping fluid reduces friction and silences damper noise.Manufacturer's Part Numbers: 00.4020.694.012 Black Gloss 29" 160mm 00.4020.694.015 Green 29" 160mmBuy RockShox Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
RockShox Reba RL Solo Air QR ForkDesigned for MTB trail-riding, this suspension fork comes kitted out with strong 32mm straight wall aluminium upper stanchions for an excellent balance of stiffness and durability. RockShox has also equipped this model with magnesium lower legs and a forged hollow aluminium crown, which ensure maximum strength while keeping weight to a minimum.Solo AirSolo Air's enlightened design lets you add air to your forks through a single Schrader valve, filling both the positive and negative air spring chambers simultaneously. So, they're always in perfect equilibrium, like Yin and Yang. Giving you a plush, predictable ride, you can set up in seconds, with the lightest weight air spring on the market.RL DamperReady for hitting the trails, this model features an RL Damper that includes Rebound and Lockout. This makes it easy to dial in your favourite settings for a more rider-tuned feel as you carve your way around the mountain.Features: Upper Tubes Material: 32mm Straight Wall Aluminium Lower Legs Material: Magnesium Crown Material: Forged Hollow Aluminium Use: Mountain Bike (MTB) Steerer Diameter: 1 1/8-1.5" tapered Axle Size: 9mm Quick Release (QR) Air Spring: Solo Air Damper: RL (Rebound, Lockout) Brake Type: Disc BrakeBuy RockShox Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
RockShox Reba RL Solo Air ForkAll set for hitting the trails, this MTB suspension fork comes equipped with durable 32mm straight wall aluminium upper tubes with magnesium lower legs for fantastic strength without any unnecessary weight. Another highlight is its lightweight Solo Air air spring, which ensures maximum smoothness and responsiveness on every ride. Coming complete with disc brake compatibility, this fork provides powerful front-end suspension performance with the ability to mount your favourite hydraulic disc brakes.Solo AirSolo Air's enlightened design lets you add air to your forks through a single Schrader valve, filling both the positive and negative air spring chambers simultaneously. So they're always in perfect equilibrium, like Yin and Yang. Giving you a plush, predictable ride you can set up in seconds, with the lightest weight air spring on the market.RL DamperReady for hitting the trails, this model features an RL Damper that includes Rebound and Lockout. This makes it easy to dial in your favourite settings for a more rider-tuned feel as you carve your way around the mountain.Features: Upper Tubes Material: 32mm Straight Wall Aluminium Lower Legs Material: Magnesium Crown Material: Forged Hollow Aluminium Use: Mountain Bike (MTB) Axle Size: 15x100mm Steerer Diameter: 1 1/8-1.5" tapered Air Spring: Solo Air Damper: RL (Rebound, Lockout) Brake Type: Disc BrakeBuy RockShox Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Seal BMX 10" Switch BMX HandlebarsConstructed from super-strong 1020 hi-ten steel, these Switch Bars from Seal BMX utilise a classic two-piece design for stiffness and support through the most daring of rides and jumps. With a comfortable 10" rise, 10 ° backsweep and 2 ° upsweep, swooping through the streets with superb manoeuvrability is easily achieved and encouraged.Features: Material: 1020 hi-ten Steel Rise: 10" Backsweep: 10 ° Upsweep: 2 ° Extra strong two-piece handlebarsBuy Seal BMX Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Developed at their Prolab facility on Vancouver Island, the Project Line is the result of endless hours spent designing, developing, and testing in some of the harshest and most demanding riding spots on the planet. Seven iDP's Team have tested the Project 23 to destruction and are confident that they'll provide you with the reassurance that when you do have a big spill you'll be completely protected. With its 23 full-bore vents, hardshell construction for added protection and weighing in at just 860 grams (size Large), the Project 23 ABS will keep you comfortable super safe and ventilated. Size guide: X-Small: 20.75" - 21.25" (53 - 54cm) Small: 21.5" - 22" (55 - 56cm) Medium: 22.5" - 22.75" (57 - 58cm) Large: 23.5" - 23.75" (59 - 60cm) X-Large: 24" - 24.5" (61 - 62cm) XX-Large: 24.8" - 25.1" (63 - 64cm)
The Project 23 Carbon Full Face Helmet features a whole host of materials and technologies to ensure your head gets the finest protection possible while offering an incredibly low weight for a hard-shell lid. Seven iDP chose a Carbon Fibre hardshell construction over the EPS foam core rather than in-moulding a light outer to a foam core, as can be found on most trail helmets. This makes it superb at absorbing impacts, prevents penetration from ground objects and, thanks to the carbon outer, weight is kept low without compromising safety. The CRV (Crash Release Visor) is also designed to snap away in the event of a crash, reducing forces on the neck and head. It simply snaps back into place too, rather than using bolts. The Project 23 Carbon also features the S.E.R.T. system, this acts as a slip-plane system to manage the rotational forces on your head and brain. By minimising and managing the transmission of impact forces to your brain, some 20% greater absorption than standard systems, you're less likely to suffer chronic brain injuries. The 23 vents make this the most ventilated hard-shell full-face helmet currently available. The TF (Through Flow) Goggle ventilation ensures you always have a clear view too, keeping fogging at bay. Size guide: X-Small: 20.75" - 21.25" (53 - 54cm) Small: 21.5" - 22" (55 - 56cm) Medium: 22.5" - 22.75" (57 - 58cm) Large: 23.5" - 23.75" (59 - 60cm) X-Large: 24" - 24.25" (61 - 62cm) XX-Large: 24.8" - 25.1" (63 - 64cm)
The Project 23 Carbon Full Face Helmet features a whole host of materials and technologies to ensure your head gets the finest protection possible while offering an incredibly low weight for a hard-shell lid. Seven iDP chose a Carbon Fibre hardshell construction over the EPS foam core rather than in-moulding a light outer to a foam core, as can be found on most trail helmets. This makes it superb at absorbing impacts, prevents penetration from ground objects and, thanks to the carbon outer, weight is kept low without compromising safety. The CRV (Crash Release Visor) is also designed to snap away in the event of a crash, reducing forces on the neck and head. It simply snaps back into place too, rather than using bolts. The Project 23 Carbon also features the S.E.R.T. system, this acts as a slip-plane system to manage the rotational forces on your head and brain. By minimising and managing the transmission of impact forces to your brain, some 20% greater absorption than standard systems, you're less likely to suffer chronic brain injuries. The 23 vents make this the most ventilated hard-shell full-face helmet currently available. The TF (Through Flow) Goggle ventilation ensures you always have a clear view too, keeping fogging at bay. Size guide: X-Small: 20.75" - 21.25" (53 - 54cm) Small: 21.5" - 22" (55 - 56cm) Medium: 22.5" - 22.75" (57 - 58cm) Large: 23.5" - 23.75" (59 - 60cm) X-Large: 24" - 24.25" (61 - 62cm) XX-Large: 24.8" - 25.1" (63 - 64cm)
Developed at their Prolab facility on Vancouver Island, the Project Line is the result of endless hours spent designing, developing, and testing in some of the harshest and most demanding riding spots on the planet. Seven iDP's Team have tested the Project 23 to destruction and are confident that they'll provide you with the reassurance that when you do have a big spill you'll be completely protected. With its 23 full-bore vents, hardshell construction for added protection and weighing in at just 860 grams (size Large), the Project 23 ABS will keep you comfortable super safe and ventilated. Size guide: X-Small: 20.75" - 21.25" (53 - 54cm) Small: 21.5" - 22" (55 - 56cm) Medium: 22.5" - 22.75" (57 - 58cm) Large: 23.5" - 23.75" (59 - 60cm) X-Large: 24" - 24.5" (61 - 62cm) XX-Large: 24.8" - 25.1" (63 - 64cm)