The 24" Alpha Four features a new 9-speed Microshift drive train. The 11-36T wide range gearing is the real deal and gives growing riders truly usable gear range.Prevelo confidence inspiring low and narrow geometry. Prevelo geometry keeps the rider low, balanced and in controlLightweight 6061 aluminium frame with custom formed tubingLightweight aluminium alloy fork with chromoly steererTektro front and rear v-brakesLightweight Allen head front and rear wheel skewers for secure wheel installationThree piece crank with squared taper bottom cartridge bearing bottom bracket and ultra narrow Q factorCustom made cranks. All Prevelo cranks are sized specifically for each model bike, down to the millimetreNEW Microshift 9-speed drivetrain. Uses a shorter pulley cage without comprising gear ratio width. Because kids bikes have small wheel diameters, rear derailleurs on kids bikes hang low and close to the ground. The Prevelo Alpha bikes use smaller cage derailleurs to keep things high and away from the groundMicroshift Trigger Shifters. Small hands have a hard time using twist shifters. We use reliable silky smooth thumb shifters. They are easy for small hands to operate and operate just like shifters on high performance bikesReplaceable derailleur hanger. If the derailleur takes a hard hit, the hanger can be replaced without repair to the frame11-36T wide span gearing gives riders plenty of range to spin up tough hills95% assembled. Just install the handlebar, seatpost, front wheel and pedalsPLEASE NOTE: The specification of the bike may be subject to change at any time and may differ from the images or specification of the bike shown here. If you would like to know any specific details please contact our sales team at Tweeks Cycles.Kids Optimised Crank - Prevelo crank lengths are custom sized for each size bike to make sure little riders have optimum pedal ergonomics. And they have ultra-narrow Q-factors to match the narrow hips of young cyclists. If that sounds like technical mumbo jumbo, here's the point - Prevelo cranks will help make small riders more comfortable and efficient on their bike.Confidence Inspiring Geometry - The Alpha Four features Prevelo's signature confidence inspiring geometry. Prevelo geometry utilizes a low bottom bracket that lowers the centre of gravity of the bike and rider, making for a more agile and confident ride.9 Speed Microshift Drivetrain with Wide Span Gearing - 9-speed Microshift drive train and 11-36T wide range gearing is the real deal and gives growing riders truly usable and class leading, 327% gear range. Kids are going to be efficient on the flats and have the leverage of low gears available to help make it up tough hills.Kid Optimised Cockpit - This is where little riders command their steed. It's decked out with ultra thin grips and short reach brake levers that are optimized for small hands. The Microshift shifter is operated with two easy to operate thumb levers.Specifications:Weight (including pedals): 21.2lbs / 9.6kgMinimum Saddle Height: 25.8in / 655mmMaximum Saddle Height: 31.2in / 792mmBottom Bracket Height: 9.9in / 252mmGain Ratio: 1.9 - 6.8Stand over (ground to top of top tube): 22in / 558.8mmSize Chart:
The 14" Alpha One from Prevelo is the smallest pedal bike in the Prevelo line up and fits most 3 to 4.5 year olds. It's packed with features to get little riders off to the right start.Prevelo confidence inspiring low and narrow geometry. Prevelo geometry keeps the rider low, balanced and in controlLightweight 6061 aluminium frame with custom formed tubingLightweight aluminium alloy fork with chromoly steererTektro front and rear v-brakes with small reach brake leversFront hub with low profile rounded hex bolts and no harsh edged nuts for little legs to knock againstThree piece crank with squared taper cartridge bearing bottom bracket and ultra narrow Q factorDouble chain wheel guardCustom made cranks. All Prevelo cranks are sized specifically for each model bike, down to the millimetre95% assembled. Just install the handlebar, seatpost and pedalsPLEASE NOTE: The specification of the bike may be subject to change at any time and may differ from the images or specification of the bike shown here. If you would like to know any specific details please contact our sales team at Tweeks Cycles.Kid Optimised Crank - Prevelo crank lengths are custom sized for each size bike to make sure little riders have optimum pedal ergonomics. And they have ultra-narrow Q-factors to match the narrow hips of young cyclists. If that sounds like technical mumbo jumbo, here's the point - Prevelo cranks will help make small riders more comfortable and efficient on their bike.BOXT Rear Stays and Forged Dropouts - Kids are going to put their bikes through the ringer, so Prevelo bikes are built kid tough with robust BOXT rear chain stays and seat stays, and BMX track style forged dropouts that shroud the rear axle.Confidence Inspiring Geometry - The Alpha One features Prevelo's signature confidence inspiring geometry. Prevelo geometry utilizes a low bottom bracket that lowers the centre of gravity of the bike and rider, making for a more agile and confident ride.Kid Friendly Hubs - The hubs are equipped with rounded axle bolts that minimize hard edges. And because kids are going to run their bikes through muck, the hubs have rubber seals to keep out dirt and grime.Kid Optimised Cockpit - This is where little riders command these steed. It's decked out with ultra small diameter grips and short reach brake levers that are optimized for small hands.Low Stand Over Height - A low minimum seat height and dropped top tube help accommodate the smallest riders.Specifications:Weight (including pedals) - 14.4 lbs / 6.5 kg (13.45 lbs / 6.1 kg with freewheel kit installed)Minimum Saddle Height - 15.6 in / 397 mmMaximum Saddle Height - 17.5 in / 445 mmBottom Bracket Height - 6.7 in / 170 mmGain Ratio - 3.7Stand over (ground to top of top tube) - 14in / 355.6mmSize Chart:
The 20" Alpha Three from Prevelo is their smallest geared bike. The new 9-speed Microshift drive train and 11-36T wide range gearing is the real deal and gives growing riders a truly usable gear range.Prevelo confidence inspiring low and narrow geometry. Prevelo geometry keeps the rider low, balanced and in controlLightweight 6061 aluminium frame with custom formed tubingLightweight aluminium alloy fork with chromoly steererTektro front and rear v-brakesLightweight Allen head front and rear wheel skewers for secure wheel installationThree piece crank with squared taper cartridge bearing bottom bracket and ultra narrow Q factorCustom made cranks. All Prevelo cranks are sized specifically for each model bike, down to the millimetreNEW Microshift 9-speed drivetrain. Uses a shorter pulley cage without comprising gear ratio width. Because kids bikes have small wheel diameters, rear derailleurs on kids bikes hang low and close to the ground. The Prevelo Alpha bikes use smaller cage derailleurs to keep things high and away from the groundMicroshift Trigger Shifters. Small hands have a hard time using twist shifters. We use reliable silky smooth thumb shifters. They are easy for small hands to operate and operate just like shifters on high performance bikes95% assembled. Just install the handlebar, seatpost, front wheel and pedalsPLEASE NOTE: The specification of the bike may be subject to change at any time and may differ from the images or specification of the bike shown here. If you would like to know any specific details please contact our sales team at Tweeks Cycles.Kid Optimised Crank - Prevelo crank lengths are custom sized for each size bike to make sure little riders have optimum pedal ergonomics. And they have ultra-narrow Q-factors to match the narrow hips of young cyclists. If that sounds like technical mumbo jumbo, here's the point - Prevelo cranks will help make small riders more comfortable and efficient on their bike.Confidence Inspiring Geometry - The Alpha Two features Prevelo's signature confidence inspiring geometry. Prevelo geometry utilizes a low bottom bracket that lowers the centre of gravity of the bike and rider, making for a more agile and confident ride.9 Speed Microshift Drivetrain with Wide Span Gearing - 9-speed Microshift drive train and 11-36T wide range gearing is the real deal and gives growing riders truly usable and class leading, 327% gear range. Kids are going to be efficient on the flats and have the leverage of low gears available to help make it up tough hills.Kid Optimised Cockpit - This is where little riders command their steed. It's decked out with ultra-thin grips and short reach brake levers that are optimized for small hands. The Microshift shifter is operated with two easy to operate thumb levers.Specifications:Weight (including pedals): 18.9 lbs / 8.6kgMinimum Saddle Height : 20.7 in / 525mmMaximum Saddle Height: 25.5 in / 648mmBottom Bracket Height: 8.1 in / 205mmGain Ratio: 1.9 - 6.7Stand Over: (ground to top of top tube) 17.5 in / 444.5mmSize Chart:
The 16" Alpha Two is the perfect bike for 4 to 6 year olds whether they are just learning to ride or are mastering the trails.Ships with a bonus short seat post for additional height adjustment. A short seat post and the tool required to change seat post are included!Prevelo confidence inspiring low and narrow geometry. Prevelo geometry keeps the rider low, balanced and in controlLightweight 6061 aluminium frame with custom formed tubingLightweight aluminium alloy fork with chromoly steererTektro front and rear v-brakes with small reach brake leversFront and rear hubs with low profile rounded hex bolts and no harsh edged nuts for little legs to knock againstThree piece crank with squared taper cartridge bearing bottom bracket and ultra narrow Q factorDouble chain wheel guardCustom made cranks. All Prevelo cranks are sized specifically for each model bike, down to the millimetre95% assembled. Just install the handlebar, seatpost and pedalsKid Optimised Crank - Prevelo crank lengths are custom sized for each size bike to make sure little riders have optimum pedal ergonomics. And they have ultra-narrow Q-factors to match the narrow hips of young cyclists. If that sounds like technical mumbo jumbo, here's the point - Prevelo cranks will help make small riders more comfortable and efficient on their bike.BOXT Rear Stays and Forged Dropouts - Kids are going to put their bikes through the ringer, so Prevelo bikes are built kid tough with robust BOXT rear chain stays and seat stays, and BMX track style forged dropouts that completely shroud the rear axle bolts.Confidence Inspiring Geometry - The Alpha Two features Prevelo's signature confidence inspiring geometry. Prevelo geometry utilizes a low bottom bracket that lowers the centre of gravity of the bike and rider, making for a more agile and confident ride.Kid Friendly Hubs - The hubs are equipped with rounded axle bolts that minimize hard edges. And because kids are going to run their bikes through muck, the hubs have rubber seals to keep out dirt and grime.Kid Optimised Cockpit - This is where little riders command their steed. It's decked out with ultra small diameter grips and short reach brake levers that are optimized for small hands.Low Stand Over Height - A low minimum seat height and dropped top tube help accommodate the smallest riders.Specifications:Weight (including pedals): 14.5 lbs / 6.6 kgMinimum Saddle Height : 17.7 in / 450 mm*Maximum Saddle Height: 25.0 in / 635 mmBottom Bracket Height: 7.2 in / 182 mmGain Ratio: 3.8Stand over: (ground to top of top tube) 15 in / 381mm*The Alpha Two includes a bonus short seat post that allows the saddle height to be lowered to 17.7 inches. Standard 300mm seat post height range: 21 in (535 mm) to 25 in (640 mm). Short 200mm seat post height range: 17.7 in (450 mm) to 21 in (535 mm).PLEASE NOTE: The specification of the bike may be subject to change at any time and may differ from the images or specification of the bike shown here. If you would like to know any specific details please contact our sales team at Tweeks Cycles.Size Chart:
Alpha Fins are the only swim fins to be manufactured with injection moulded EVA foam. The ultra soft EVA foam make the Alpha Fins 70% lighter than traditional swim fins and provide unparalleled comfort. Due to the buoyancy of the material, these fins improve a swimmers body position while activating their kick.
Combining the luxurious quality, wicking, and naturally odourless qualities of merino wool with the superb insulation of PrimaLoft® yarns, the Castelli Alpha 18 Socks are ideal for your coldest adventures and when going out on the bike feels like a necessity more than anything else. Nylon heels and toes introduce durability and arch support bands hold the socks in place.Key FeaturesPrimaLoft®/merino wool blend,Arch support band,Nylon heel and toe,18cm ankle height.
Combining the luxurious quality, wicking, and naturally odourless qualities of merino wool with the superb insulation of PrimaLoft yarns, the Castelli Alpha 18 Socks are ideal for your coldest adventures and when going out on the bike feels like a necessity more than anything else. Nylon heels and toes introduce durability and arch support bands hold the socks in place. Key Features PrimaLoft/merino wool blend Arch support band Nylon heel and toe 18cm ankle height
Combining the luxurious quality, wicking, and naturally odourless qualities of merino wool with the superb insulation of PrimaLoft yarns, the Castelli Alpha 18 Socks are ideal for your coldest adventures and when going out on the bike feels like a necessity more than anything else. Nylon heels and toes introduce durability and arch support bands hold the socks in place. Key Features PrimaLoft/merino wool blend Arch support band Nylon heel and toe 18cm ankle height
The Alpha MC Studio Jacket takes Castelli’s favourite winter cycling jacket the Alpha RoS but transforms it into a casual version. Borrowing all the same technology and fabrics the Alpha MC provides the same deep winter protection as its on bike sibling.The exterior of the jacket is made from GORE-TEX INFINIUM™ WINDSTOPPER® fabric. The lightweight fabric has a unique membrane that delivers the triple crown of being completely windproof, highly breathable, and water repellent, while offering insulation. Minimal seaming and seam sealed shoulders eliminate points where moisture can enter the jacket.The signature Alpha double-layer construction provides superb insulation with PrimaLoft® synthetic down and a nylon liner that fits over other layers.Just like Castelli’s on-bike kit, all the details are there. A YKK® Vislon® zip makes for easy opening and closing. A raw-cut edge waist helps create a seal blocking out any wind, as does the new double-layer cuff design. The usual 3 rear pockets are traded for two front pockets as well as an inner chest pocket. A hood completes the jacket so you can be as warm as possible making your way to the start line, or kick starting your recovery. Key Features: Castelli’s deep winter Alpha RoS cycling jacket but in a casual design,GORE-TEX™ WINDSTOPPER® 150 fabric for wind protection with high breathability and effective rain protection,Minimal seams reduce chance of water entering the jacket,Double-layer construction with PrimaLoft® synthetic down insulation and nylon liner that slides easily over other layers,YKK® Vislon® zipper for easy regulation of airflow,Raw-edge waist with silicone gripper lies flat and seals out wind,Double-layer cuff integrates with glove to prevent cold wind or water from entering,2 front pockets and additional inner chest pocket,Integrated hood with draw-cord closure,.
The Alpha RoS 2 Jacket from Castelli is the ultimate winter jacket bringing warmth, high breathability, and protection against the rain along with a soft and comfortable fit.The exterior of the jacket is made from GORE-TEX INFINIUM™ WINDSTOPPER® fabric. The lightweight fabric has a unique membrane that delivers the triple crown of being completely windproof, highly breathable, and water repellent, while offering insulation.Minimal seaming and seam sealed shoulders eliminate points where moisture can enter the jacket when you are venturing through mist, wet roads, and even incessant light rain.The unique dual-layer construction of the Alpha is where its insulating qualities really excel. Underneath the exterior layer, the Alpha jacket has an internal vest that hugs close to your body. This offers insulation suitable down to -5°C, and it also means you can regulate your temperature with ease. You can open the external layer to allow airflow into the jacket and evacuate moisture without sacrificing insulation and exposing your body to wind chill.A double-layer cuff integrates with winter gloves and a lie-flat waist hugs close to the body to prevent cold from entering at the jacket’s openings.The stretch fabric is in an updated pattern with a narrower panel between the shoulders and a wider front that makes for a close-to-body fit that minimises flapping and better reflects the shape of your body on the bike. The new cut accommodates a wide range of body types and positions on the bike. Key Features: GORE-TEX INFINIUM™ WINDSTOPPER® 150 fabric. Highly breathable wind protection and effective rain protection,Minimal seaming with seam sealed shoulders reduces chances for water to enter through stitching,Double-layer Alpha construction separates insulating layer from the wind/water external barrier to let you better regulate ventilation,Water-resistant YKK® Vislon® zipper slides easily,Raw-edge waist with silicone gripper lies flat and seals out wind,Double-layer cuff integrates with glove to prevent cold wind and water entering,Stretch fabrics with advance patterning for excellent close to body fit,Back ventilation,3 rear pockets with reflective laser-cut drain holes,Zippered secure side pocket for valuables,-5° – 10°C / 23° – 50°F,Weight: 525g (Large),.
The Alpha ROS 2 is Castelli's ultimate jacket, bringing warmth, breathability and excellent level of rain protection teamed with a comfort, soft fit and feel. The Alpha ROS 2 sets the standard by which all others are measured.Gore Infinium Windstopper 150 fabric provides excellent protection from the elementsSeam sealing and double stitching on shoulders keep you mostly dryAlpha construction separates water/wind protection from insulation layerBetter ventilation and moisture evaporation thanks to separate insulation layerStretch fabrics and raw-edge waist and wrist cuffs improve comfort and fitThere was a time when your cycling wardrobe consisted of items for all occasions, as your wet weather gear was to clammy and flappy in the dry and your dry weather kit just didn't hack it in the rain. Castelli's Gabba and Perfetto ranges bridged the gap, but the Alpha ROS 2 takes all-weather performance to the next level. The Alpha ROS 2 features a clever two-layer construction to separate the insulation layer from the protective outer shell, giving better ventilation and moisture evaporation. Further boosting ventilation is the double front opening and the excellent breathability of the Gore Infinium Windstopper 150 fabric.Not only does the Infinium Windstopper 150 fabric offer excellent breathability and protection from the elements, it is also extremely soft to the touch and stretchy, allowing for a superb fit to provide excellent comfort. Raw-edge waist and wrist cuffs also improve fit and comfort. The excellent weather protection of the Windstopper fabric is improved even further by the addition of a DWR treatment as well as selective seam sealing, with addition seam sealing and double stitching on the shoulders. Along with a waterproof YKK Vislon Zipper, the jacket is essentially waterproof while not compromising it's excellent dry weather performance. An occasional drop may seep through the seams, but you'll still be warm and dry with the jacket letting any internal moisture evaporate with ease. The Alpha also features 3 rear pockets with reflective laser-cut drain holes to boost practicality and visibility. For riders looking for versatile jacket for all riding conditions, the Castelli Alpha ROS 2 is one of the best around.
Castelli Alpha ROS 2 JacketPart of their Rain or Shine range, the Castelli Alpha ROS 2 Jacket is an adaptable and protective cycling jacket suited to a wide range of weather conditions. Great in the cold and dry weather, protective in warmer and wetter weather, it lives up to the Rain or Shine moniker. This third generation of the Alpha ROS 2 Jacket is the best yet. Updates include improved fabrics to give a boost to performance in the wet as well as enhancing breathability while new double-layer cuffs work better with winter gloves. And it still retains the innovative double-layer construction that makes it so good in so many cycling conditions. Rain Out. Warmth in. Dressing for changeable weather is always tricky. Too warm. Not warm enough. Lots of layers. Rain jacket. It's all a bit much sometimes. However, the Alpha ROS 2 is best in class for your cold, dry days on the bike. And yet come rainy weather, you won't have to immediately reach for a hardshell rain jacket. This is all made possible by the high-performance Gore® INFINIUM™ Windstopper® 150 fabric and double-layer Alpha construction. Gore® INFINIUM™ Windstopper® 150 fabric is completely windproof, superbly breathable and fends off all but the heaviest of downpours. Meanwhile, the Alpha design keeps the outer weather-protective layer from the inner insulating layer. This allows you to keep your core protected while still ventilating the outer layers. The result is more control of body heat, better moisture evaporation and greater comfort across a wide range of conditions. Performance Fit and FeaturesStretch fabrics with advanced patterning make for an excellent close-to-body fit that still accommodates a wide range of body types. A raw-edge waist that lies flat and moves with you plus the Castelli silicone text gripper at your waist keeps the jacket from riding up. 3 rear pockets with reflective laser-cut drain holes plus an extra pocket with waterproof zip make for a very practical jacket with plenty of storage space.For those of you seeking the ultimate in versatile all-weather, multi-season cycling protection you really need not look any further. Think of this as taking all your winter kit options and distilling it into one incredible do-it-all garment. We think you'll find it's worth every penny.Features:Materials: 100% PolyesterGORE-TEX INFINIUM™ WINDSTOPPER® 150 fabric for wind protection, high breathability and effective rain protectionReduced seaming with seam sealing on shouldersDouble-layer Alpha construction separates the insulating layer from wind/water barrierRaw-edge waist with silicone gripperDouble-layer cuff integrates with glovesBack ventilation3 rear pockets with reflective laser-cut drain holes + zippered secure side pocket for valuablesWater-resistant YKK® Vislon®Stretch fabrics with advanced patterning make for excellent close-to-body fitSuggested temperature range: -5 to 10 degrees CBuy Castelli Clothing from Chain Reaction Cycles, the World's Largest Online Bike Store.