###section### Product Specs MATERIAL: Aluminium TOP TUBE LENGTH: 18.5" HEAD TUBE ANGLE: 72.5 SEAT TUBE ANGLE: 70 CHAIN STAY LENGTH: 12.7" - 13.7" BB HEIGHT: 269.2mm WHEEL SIZE: 20 x 1 1/8" STANDOVER HEIGHT: DROPOUT SIZE: 10mm HEADSET TYPE: 1 1/8" BB TYPE: EURO SEAT TUBE DIAMETER: 22.2mm BRAKE MOUNTS: V-Brakes WEIGHT: 1159g / 2.55lb ###section### Product Highlights
###section### Product Specs MATERIAL: Aluminium TOP TUBE LENGTH: 17.5" HEAD TUBE ANGLE: 72 SEAT TUBE ANGLE: 69 CHAIN STAY LENGTH: 12.3" - 13.4" BB HEIGHT: 269.2mm WHEEL SIZE: 20 x 1 1/8" STANDOVER HEIGHT: DROPOUT SIZE: 10mm HEADSET TYPE: 1 1/8" BB TYPE: EURO SEAT TUBE DIAMETER: 22.2mm BRAKE MOUNTS: V-Brakes WEIGHT: 1188g / 2.61lb ###section### Product Highlights
Although the crank arms and spider arms are noticeably bigger, which increases stiffness, the overall weight has dropped by 7g over the previous edition of Dura-Ace. The crankset has been adapted to work with disc brake road bikes that generally have 135mm rear hub spacing and shorter chainstays without the need to increase Q-factor thanks to its wider chainring spacing. The Compact version offered here features a 50.34T chainring profile to offer an excellent rider tuned gear combination for varied conditions from flats to high mountains. Please note: Bottom bracket is NOT included.
Shimano Dura-Ace R9100 Compact 11 Speed ChainsetThe Dura-Ace R9100 chainset is the highest level of cranks produced within the Shimano road product range. Designed to be light weight and stiff, this compact chainset comes with a 50-34t chainring setup ensuring you have a wide range ratio for climbing and descending.The Shimano Dura-Ace R9100 Compact Chainset has been completely re-designed to offer the very best combination of light weight and stiffness. It features Shimano's iconic 4-arm hollow spider that is made from hollow-forged aluminium.Although the crank arms and spider arms are noticeably bigger, which increases stiffness, the overall weight has dropped by 7g over the previous edition of Dura-Ace.The chainset has been adapted to work with disc brake road bikes that generally have 135mm rear hub spacing and shorter chainstay without the need to increase Q-factor thanks to its wider chainring spacing.The Compact version offered here features a 50/34T chainring profile to offer an excellent rider tuned gear combination for varied conditions from flats to high mountains.Please note: Bottom bracket is NOT included.Features: Enhanced design saves 7g while maintaining rigidity Iconic 4-arm construction maintains high rigidity and reduces weight Optimised crank arm design strengthens key stress zones Chainring tooth profile is adapted for race bike specific disc brake systems Accommodates shorter chainstay (410mm) with 135mm/142mm rear hub spacing Hollowglide chainring construction maintains smooth shifting whilst reducing weight and increasing stiffness Axle Diameter: 24mm Bottom Bracket Included: No Weight: 609g (50/34T)Manufacturer Reference Codes:Black 110mm 50/34T 170mm: FCR9100C04 Black 110mm 50/34T 172.5mm: FCR9100D04 Black 110mm 50/34T 175mm: FCR9100E04Black 110mm 50/34T 165mm: FCR9100A04A 2-year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).Buy Shimano Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
The HollowTech II 12-speed Dura-Ace chainset offers the optimum balance of light weight and rigidity, making it the global choice for road racing's elite riders Hollow outer chainring, giving vast improvements in rigidity and increased weight savings The hollow outer chainring has essentially removed outer chainring flex, hugely improving shift performance making it precise even under high load These industry leading HollowTech II 4 arm cold forged hollow crank arms have been evolved to increase rigidity, reduce weight, and improve strength The teeth have been developed to work only in conjunction with the 12-speed chains for improved contact providing more efficiency and improved power transfer There is a wide range of chainring ratios and crank arm lengths available enabling customisation for all riders and racing disciplines HollowTech II integrated bottom bracket design uses a wider bearing placement and larger axle diameter for increased stiffness and efficiency Bottom bracket seal design has a minimal bearing interface gives superbly smooth rolling and increased durability
Tested on the track and designed in conjunction with a team with BMX race knowledge spanning 3 decades, Radio Helium frames are well thought out and powerful pure bred race machines. You’ll find no gimmicks, no “goofy” tubing shapes or unnecessary features. These frames have been built from the ground up with race proven geometry and technology combined with clean, functional aesthetics designed to give you the holeshot out of the gate. Radio Helium frames are designed to feel comfortable, stiff and fast, exactly how a race bike should. ###section### Product Specs MATERIAL: Hydroformed 6061-T6 alloy - 21.25" Top Tube TOP TUBE LENGTH: 21.25" HEAD TUBE ANGLE: 74° SEAT TUBE ANGLE: 71° CHAIN STAY LENGTH: 14.5" BB HEIGHT: 11.6" WHEEL SIZE: 20" STANDOVER HEIGHT: TBC DROPOUT SIZE: 10mm HEADSET TYPE: Integrated BB TYPE: Euro BRAKE MOUNTS: Welded WEIGHT: 1.840kg / 4.05lbs ###section### Product Highlights BMX Racing Specific Geometry Race Specific Frame Strong and lightweight Hydroformed tubing for increased strength Integrated seat post clamp
Tested on the track and designed in conjunction with a team with BMX race knowledge spanning 3 decades, Radio Helium frames are well thought out and powerful pure bred race machines. You’ll find no gimmicks, no “goofy” tubing shapes or unnecessary features. These frames have been built from the ground up with race proven geometry and technology combined with clean, functional aesthetics designed to give you the holeshot out of the gate. Radio Helium frames are designed to feel comfortable, stiff and fast, exactly how a race bike should. ###section### Product Specs MATERIAL: Hydroformed 6061-T6 alloy - 22.25" Top Tube TOP TUBE LENGTH: 22.25" HEAD TUBE ANGLE: 74° SEAT TUBE ANGLE: 71° CHAIN STAY LENGTH: 14.8" BB HEIGHT: 11.6" WHEEL SIZE: 20" STANDOVER HEIGHT: TBC DROPOUT SIZE: 10mm HEADSET TYPE: 1-1/8" - 1.5" tapered BB TYPE: Euro BRAKE MOUNTS: Welded WEIGHT: 1.905kg / 4.20lbs ###section### Product Highlights BMX Racing Specific Geometry Race Specific Frame Strong and lightweight Hydroformed tubing for increased strength Integrated seat post clamp
Tested on the track and designed in conjunction with a team with BMX race knowledge spanning 3 decades, Radio Helium frames are well thought out and powerful pure bred race machines. You’ll find no gimmicks, no “goofy” tubing shapes or unnecessary features. These frames have been built from the ground up with race proven geometry and technology combined with clean, functional aesthetics designed to give you the holeshot out of the gate. Radio Helium frames are designed to feel comfortable, stiff and fast, exactly how a race bike should. ###section### Product Specs MATERIAL: Hydroformed 6061-T6 alloy - 22.5" Top Tube TOP TUBE LENGTH: 22.5" HEAD TUBE ANGLE: 74° SEAT TUBE ANGLE: 71° CHAIN STAY LENGTH: 15.2" BB HEIGHT: 11.6" WHEEL SIZE: 20" STANDOVER HEIGHT: TBC DROPOUT SIZE: 10mm HEADSET TYPE: Integrated BB TYPE: Euro BRAKE MOUNTS: Welded WEIGHT: 1.905kg / 4.20lbs ###section### Product Highlights BMX Racing Specific Geometry Race Specific Frame Strong and lightweight Hydroformed tubing for increased strength Integrated seat post clamp
Tested on the track and designed in conjunction with a team with BMX race knowledge spanning 3 decades, Radio Helium frames are well thought out and powerful pure bred race machines. You’ll find no gimmicks, no “goofy” tubing shapes or unnecessary features. These frames have been built from the ground up with race proven geometry and technology combined with clean, functional aesthetics designed to give you the holeshot out of the gate. Radio Helium frames are designed to feel comfortable, stiff and fast, exactly how a race bike should. ###section### Product Specs MATERIAL: Hydroformed 6061-T6 alloy - 21.75" Top Tube TOP TUBE LENGTH: 21.75" HEAD TUBE ANGLE: 74° SEAT TUBE ANGLE: 71° CHAIN STAY LENGTH: 14.8" BB HEIGHT: 11.6" WHEEL SIZE: 20" STANDOVER HEIGHT: TBC DROPOUT SIZE: 10mm HEADSET TYPE: Integrated BB TYPE: Euro BRAKE MOUNTS: Welded WEIGHT: 1.870kg / 4.12lbs ###section### Product Highlights BMX Racing Specific Geometry Race Specific Frame Strong and lightweight Hydroformed tubing for increased strength Integrated seat post clamp
The Radio Helium frames took the race world by storm when originally . With multiple world championship wins, the Helium frame is now a common sight on tracks across the globe. Radio's flagship frame now uses their own unique forged dropout design which allows it to be fully disc-brake compatible when used with the Helium disc brake mount. ###section### Product Specs MATERIAL: Hydroformed 6061 alloy TOP TUBE LENGTH: 20.9” HEAD TUBE ANGLE: 74° SEAT TUBE ANGLE: 71° CHAIN STAY LENGTH: 13.9” BB HEIGHT: 11.6" WHEEL SIZE: 20" STANDOVER HEIGHT: TBC DROPOUT SIZE: 20mm HEADSET TYPE: Integrated tapered 1-1/8” – 1.5” BB TYPE: Euro SEAT TUBE DIAMETER: 27.2mm BRAKE MOUNTS: V-Brake WEIGHT: TBC ###section### Product Highlights BMX Racing Specific Geometry Race Specific Frame Hydroformed tubing for increased strength Built in chain tensioners Disc brake mounts
The Radio Helium frames took the race world by storm when originally . With multiple world championship wins, the Helium frame is now a common sight on tracks across the globe. Radio's flagship frame now uses their own unique forged dropout design which allows it to be fully disc-brake compatible when used with the Helium disc brake mount. ###section### Product Specs MATERIAL: Hydroformed 6061 alloy TOP TUBE LENGTH: 21.25” HEAD TUBE ANGLE: 74° SEAT TUBE ANGLE: 71° CHAIN STAY LENGTH: 14.5” BB HEIGHT: 11.6" WHEEL SIZE: 20" STANDOVER HEIGHT: TBC DROPOUT SIZE: 20mm HEADSET TYPE: Integrated tapered 1-1/8” – 1.5” BB TYPE: Euro SEAT TUBE DIAMETER: 27.2mm BRAKE MOUNTS: V-Brake WEIGHT: TBC ###section### Product Highlights BMX Racing Specific Geometry Race Specific Frame Hydroformed tubing for increased strength Built in chain tensioners Disc brake mounts
The Radio Helium frames took the race world by storm when originally . With multiple world championship wins, the Helium frame is now a common sight on tracks across the globe. Radio's flagship frame now uses their own unique forged dropout design which allows it to be fully disc-brake compatible when used with the Helium disc brake mount. ###section### Product Specs MATERIAL: Hydroformed 6061 alloy TOP TUBE LENGTH: 21.75” HEAD TUBE ANGLE: 74° SEAT TUBE ANGLE: 71° CHAIN STAY LENGTH: 14.8” BB HEIGHT: 11.6" WHEEL SIZE: 20" STANDOVER HEIGHT: TBC DROPOUT SIZE: 20mm HEADSET TYPE: Integrated tapered 1-1/8” – 1.5” BB TYPE: Euro SEAT TUBE DIAMETER: 27.2mm BRAKE MOUNTS: V-Brake WEIGHT: TBC ###section### Product Highlights BMX Racing Specific Geometry Race Specific Frame Hydroformed tubing for increased strength Built in chain tensioners Disc brake mounts