Ultegra 8170 Groupset 12spd Semi-Wireless, 50-34T, 172.5mm, 11-30T, 116L, Centerlock, 160mm kids They are reasonably priced and

They are reasonably priced and good quality and they also come in cool colours to match your bike

it expands into an easy to use

Safe to use for cleaning most metal

Charge - 2 hrs (full cycle)

Ultegra 8170 Groupset 12spd Semi-Wireless, 50-34T, 172.5mm, 11-30T, 116L, Centerlock, 160mm kids They are reasonably priced andThe new groupset from Shimano offers superior shifting performance with more gears, higher torque shifting, and more. Say bye bye to your disc brakes rubbing with their new brakes with greater clearance. More aerodynamic than ever before! The fastest shifting we've seen from Shimano! FC R8100 2x12s Crankset In this package: 50 34T, 172. 5mm, FCR8100DX04 ULTEGRA's new FC R8100 crank maintains the same quick, precise front shifting and efficient power