e*thirteen Helix R 107 BCD 4-Bolt Chainring - 42t 11/12-Speed 107BCD Black MFPN=00.4318.005.012 and Rock Steady) for up

and Rock Steady) for up to 50 hours of run time using 2xAAA batteries

Clearance to run 700c x 45mm tires

Safety is the key with integrated reflectors and a LED taillight at the back ensuring high visibility of the cyclist during the day and night

3'' (135mm) Roller Diameter: 100-110mm Suitable Bikes: When distance between front and rear axle is 980mm and 1100mm

A good shape that is suitable for all

e*thirteen Helix R 107 BCD 4-Bolt Chainring - 42t 11/12-Speed 107BCD Black MFPN=00.4318.005.012 and Rock Steady) for upThe e*thirteen Helix Race 107 BCD Chainring designed for 4 bolt 107 BCD cranks like SRAM Red or Force including power meter equipped cranks offers a performance upgrade for Gravel and Road cyclists. The 38 40 and 42 tooth rings pair perfectly with e*thirteens cassettes for more overall range and higher top speeds. Made from durable premium 7075 alloy they're CNC sculpted for a high stiffness to weight ratio. Compatible with both SRAM and Shimano 11