AB Premium 1 X 104BCD Oval traction chainrings are designed for any cranks that use 104BCD mounting interface. Specification Size (Weight +/-1g): 32T (41g), 34T (44g), 36T (53g). Material: CNC machined 7075 Txxx Aluminum. Long-lasting construction. Type II anodizing. Chainline: 32T - 48.5mm ; 34&36T - 50mm. Mounting Holes: 4 x 104mm BCD (for 32T ring, bolts should be min 6mm long). Ovality: Optimized to each size separately. Range: 10.2-14.4% and Timing of 110.5-116.3° after TDC (top dead center) Patent Pending. Compatibility All cranks with 4 x 104BCD interface. That means all 104BCD power meter spiders, Shimano XT / Zee / Deore / SLX / XTR, Race Face Sixc, RF Ride, RF Chester,...
Best Price: £49.95 from Merlin Cycles