TheBBB BCR-31 Compactgear Chainring. A 5 armroad chainring designed for compact cranksets BBB BCR-31 Compactgear Chainring Features 5-arm road chainrings designed for compact cranksets. CNC machined 7075 T6 aluminum. Compatible with: Shimano up to 2009 and SRAM- 9/10 speed compact cranksets. BCD: 110 mm.
