Compare bikes: Compare Btwin Ultra 700 AF Road Bike - Grey/Green (2017) vs. Specialized Langster Langster Street (2017) - Findabike

KMC Z510HX, singlespeed

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. 11/12/13/14/15/17/19/21/23/25/28.

Alloy, square taper, 48T

Joytech, track cog, 17t

Our new B'Twin Ultra Evo Vario fork is used exclusively on the B'Twin Ultra Evo Vario frame.The combination of carbon and aluminium is the ideal choice for 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 paving and cobblestones. Aerodynamic design with brake located as close as possible to the fork. Weight: 550 g in size L.

Specialized FACT carbon, alloy crown/steerer

Our new B'TWIN ULTRA frame is derived from the Evo Vario concept. 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. Weight: 1400 g in size M.

Specialized A1 Premium Aluminium, Track Geometry, fully-manipulated tubing, compact design, integrated headset

1-1/8", integrated sealed Cr-Mo cartridge bearings, 20mm alloy cone spacer, w/ 20mm spacers

Specialized Comp Multi, 3D forged alloy, 4-bolt, 12-degree rise

Hutchinson Equinox 25 C for higher performance and added comfort.

Front: Specialized Espoir Sport, 60TPI, wire bead, double BlackBelt protection, 700x25mm - Rear: Specialized Threshold, 60TPI, wire bead, BlackBelt protection, 700x28mm

The wheels were developed by B'TWIN's engineering office. 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 and hubs fitted with long-life cartridge bearings. Weight: 1.790 kg per pair. This wheel is used by the B'TWIN U19 RACING team in training and competition.

Front: AXIS Classic Track - Rear: Axis Classic Track

Shimano 105 direct mount brakes (fork and chainstay): their double pivot technology offers precision and power. Centring is always perfect with DPB technology, and they are made from cast aluminium and covered with a powder coating that withstands frequent washing.

Front: Tektro, dual-pivot, long reach - Rear: Tektro, dual pivot, long reach - Levers: Tektro TL-720, aero TT

Compact B'Twin 6061-T6 aluminium handlebar is scaled to the bike size. The compact shape is becoming increasingly common in the peleton, as it allows you to keep your hands low on the handlebars without compromising comfort. The handlebar weighs 320 g in size 420 mm. The stem is also made out of 6061-T6 aluminium. Scaled to the size of the bike. 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.

Specialized Cowhorn, alloy

B'TWIN Comp Ergo Chromo saddle: chosen for its comfort and efficiency. Weight: 257 g. B'TWIN Competition aluminium seat post. Diameter: Length: 31.6 mm;: 350 mm.Weight: 240 g.

Body Geometry Toupé Sport, steel rails, 143mm

Specialized Sport, alloy, 2-bolt, 27.2mm

Specialized Comp Multi, 3D forged alloy, 4-bolt, 12-degree rise

B'TWIN Comp VPR76 clipless pedals (come with cleats).

Nylon, loose ball bearings, w/ reflectors