E-Thirteen Helix R Guidering Direct Mount Chainring - E-Thirteen Direct Mount - 32T - 52-55mm Flip - Round - 12-Speed - Eggplant Alloy YGroup_7033713852461 D30 is soft and flexible

D30 is soft and flexible normally but becomes firm upon heavy contact

and drastically reducing rider fatigue

These are essentially a knee warmer with some abrasion-resistant qualities

Infinitely Adjustable Design - 100mm

If you are after a powerful light set with a lot of features but don't want to break the bank then look no further

E-Thirteen Helix R Guidering Direct Mount Chainring - E-Thirteen Direct Mount - 32T - 52-55mm Flip - Round - 12-Speed - Eggplant Alloy YGroup_7033713852461 D30 is soft and flexibleAccording 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