NEW SRAM Rival Crank Arm Assembly - 12/13-Speed, 8-Bolt Direct Mount, DUB Spindle, Black, E1 Crank Length:160mm Surly Ultra New Disc Rear

Surly Ultra New Disc Rear Hubs

Rear Derailleur: Shimano TY-300

The reinforced

the Tacx Training app and other apps

which measures how smoothly you descend a trail so you have a score to beat next time

NEW SRAM Rival Crank Arm Assembly - 12/13-Speed, 8-Bolt Direct Mount, DUB Spindle, Black, E1 Crank Length:160mm Surly Ultra New Disc RearSRAM has taken aluminum to another level. Careful engineering has resulted in crankarms that optimize stiffness to weight ratio, with material only where its needed 8 bolt interface compatible with power and non power AXS spiders and integrated chainrings (Chainring and spider sold separately) DUB bottom bracket adds durability and simplicity (Bottom bracket sold separately) Aluminum arms optimized for stiffness and light weight 2x Standard: 145mm Q