E-Thirteen Helix R Guidering Direct Mount Chainring - E-Thirteen Direct Mount - 30T - 52-55mm Flip - Round - 12-Speed - Grey Alloy YGroup_7033810714669 If you suffer from hand

If you suffer from hand fatigue

Flash 0~2000lm 8hrs

Compatible with PC 1170 and PC 1130 chains

60mm to suit rims between 30mm and 45mm in depth

No tools are required

E-Thirteen Helix R Guidering Direct Mount Chainring - E-Thirteen Direct Mount - 30T - 52-55mm Flip - Round - 12-Speed - Grey Alloy YGroup_7033810714669 If you suffer from handAccording to E*Thirteen, the Helix R Direct Mount Chainring is a game changer. With proven Sram and Shimano 11 or 12 speed cross compatibility applied to an ultra lightweight, durable AL 7075 t6 Chainring and a highly CNCD technical finish. Combine with the chain, derailleur shifter of choice without a change in chain retention quality. Build a dream rig with more freedom and spec creatively. One of the strongest and most durable alloys available, AL