Our new B'Twin Ultra frame is derived from Evo Vario technology. Aluminium is an ideal choice for obtaining an excellent propulsion-to-comfort ratio. The variable thickness tubes considerably reduce the weight and ensure excellent performance on all surfaces, even very rough terrain. The design is aerodynamic, the cabling is integrated into the frame, and the rear brake is positioned under the chainstays.
This frame is UCI-approved.
Total weight: 1400 g in size M.
Fork / suspension
Our new B'TWIN ULTRA Evo Vario fork is mounted exclusively on the B'TWIN ULTRA Evo Vario frame. The combination of carbon and aluminium offers perfect synergy between the B'TWIN ULTRA Evo Vario frame and fork.
We have achieved a damping effect on very uneven and bumpy terrain such as cobblestones. Aerodynamic design with brake located as close to the fork as possible.
Total weight: 550 g in size L.
Shimano 105 direct mount brakes (fork and chainstay): their double pivot technology provides precision and power, the centring is still perfect with the DPB technology, and they are made from cast aluminium and covered with powder paint that withstands frequent washing.
Crankset / cassette
Shimano RS 500 50x34 chainset.
Crank length varies according to size of bike: XS, S: 170 mm / M: 172.5 mm / L, XL: 175 mm.
Shimano 105 11S 11 x 28.
The compact Btwin handlebar is sized to the bike.
It compact shape is now common in the peloton, allowing you to place your hands at the bottom of the handlebar without any discomfort.
The handlebar weighs 320 g in size 420 mm
The 6061-T6 aluminium stem is also specifically designed for the size of the bike, and weighs 140 g in size 110 mm.
The steering uses long-life, sealed bearings, with a 1⅛" diameter at the top and 1¼" at the bottom.
The wheels were developed by the B'Twin R&D department. This pair of wheels is designed for all-terrain use, with 20 spokes at the front and 24 at the rear. The rim is 28 mm high .
Very versatile profile: the hubs are fitted with long-life cartridge bearings.
The wheels weigh only 1790 g per pair.
This wheel is used by the B'Twin U19 RACING team in training and competition.
Hutchinson Equinox 25 C for higher performance and added comfort.
Saddle / Seat post
B'TWIN Comp Ergo Chromo saddle.
This saddle has been chosen for its comfort and efficiency.
B'TWIN Competition aluminium seat post.
Diameter: 31.6 mm. Length: 350 mm.
8.9 kg in size M, without pedals.
Store your bike in a dry, cool place. If riding or storing your bike in a salty environment, be sure to wash your bike after each use.