Sram X4 Rear Derailleur Hybrid Bikes and a Giant Wheel System

and a Giant Wheel System lets you run tubeless tyres up to 28mm for a smoother ride quality and reduced risk of flats

these wheels are compatible with a 12 x 100 front axle and a 12 x 142 rear axle

Extremely durable and grippy

Evo Compound – High-tech formulation that provides excellent grip and low rolling resistance at the same time

It has every performance feature of a high-end road bike

Sram X4 Rear Derailleur Hybrid Bikes and a Giant Wheel SystemSHIFTING PERFORMANCE Leveraging the legendary history of SRAM shifting, the X4 rear derailleur provides great shifting performance. SPECIFICATIONS Speed (RD): 9 8 7s Cable pull ratio: 1: 1 Cage (RD): Long Max tooth: 34 Pulley bearings material: Steel Cage material (RD): Aluminium