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15 axle spacers
39/53 Material Aluminum Position Outer Primary Color Grey Speed 11 Teeth 53
L: 19''-21'' (48-53cm)
50/37T chainring combinations
Vivid Air B1 (Needs Counter Measure tool)
HRM 600 Frame Pumps 15 axle spacersHRM 600, the premium heart rate monitor, is built for data driven performance athletes. It provides accurate heart rate and HRV data plus running dynamics with step speed loss which helps runners improve their form when paired to a compatible smartwatch. After pushing hard, easily remove the module, and throw the strap in the wash. Attributes Connectivity ANT+, BT
