Compatibility: ONLY for Sram cranks that have 1 hidden chainring bolt behind the crank arm: Sram Red, Red eTap, Red22, Force1, Force22, Rival, Rival1. Compatible with Quarq. For Apex cranks - please navigate to our standard 110/5 rings.
Material: CNC machined 7075 Txxx Aluminum. Long-lasting construction
Mounting: 110 BCD x 5
Bolts: Reuse original Sram bolts except the hidden bolt. AB Outer chainring comes with the hidden bolt in the package. If changing inner chainring only - reuse all original bolts.
Ovality: Optimized to each size separately. 34T- 6.5% ; 36T- 11.4%, 50/52 - 10.3% ; Timing of 108 -109.5° after TDC (top dead center) - Ideal for road climbing. Patent Pending.
Advantages of Absolute Black Oval chainrings:
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Thank you for your ongoing support into 2021 - we hope your bikes are bringing you some enjoyment! :)