Btwin Ultra Evo Vario aluminium frame, carbon fork, aluminium pivot.
Specially designed women's saddle for sport, designed by the women's design team
How to choose the right size Ultra AF Women's bike
Women from 1.50 - 1.64 m: Size XS
Women from 1.60 - 1.71 m: Size S
Women from 1.68 - 1.76 m: Size M
Frame / fork
Btwin Alur18 Alu6061 frame approved by the UCI.
Aluminium is an ideal choice for obtaining an excellent propulsion-to-comfort ratio. The variable thickness tubes considerably reduce the weight. The cables are built into the frame.
Frame weight: 1400g in size M.
Btwin carbon fork and aluminium pivot
The combined use of carbon and aluminium: an ideal combination to obtain homogeneous behaviour with the frame.
Fork weight: 550g.
Handlebar / stem
Compact Btwin handlebars in 6061 aluminum
Width from axle to axle adapted to women's shoulder width:
Bike size XS and S: 380 mm
Bike size M: 400 mm
Handlebars weight: 297g in size 380mm.
6061 aluminium stem
Bike size XS: 60mm stem - 109g
Bike size S and M: 80mm - 127g
Shimano Tiagra 4700 10-speed drivetrain with levers adapted for better grip by women's hands.
Shimano Tiagra 4700 double front derailleur.
Shimano Tiagra 4700 GS 10-speed rear derailleur.
Shimano Tiagra double compact bottom bracket.
Crankset / cassette
Shimano Tiagra 4700 50 X 34 bottom bracket.
Crank length varies according to the bike size:
XS / S: 165 mm
M: 170 mm.
Shimano Tiagra 4700 10S 11-32 cassette.
Saddle / Seat post
Btwin woman sport saddle, chosen for its comfort and efficiency.
Btwin Competition aluminium seat post.
Diameter: 31.6 mm
Length: 300 mm
Direct Mount Tektro T531 F front brake
Tektro R540 rear brake