Funn Solo Chain Ring - 34T, 104mm BCD BlackFUNN SOLO CHAIN RING 34T, 104MM BCD A narrow wide chainring for 104mm BCD (4 bolt) setups. The Funn Solo Narrow Wide is designed for single chainring setups with 104mm BCD interface cranksets. The narrow wide tooth profile helps to lock your chain in place, doing away with the need to run a chainguide. CNCd from high quality aluminium, the Solo is both tough and light. FEATURES For 104mm BCD interface Full CNC 7075 high tensile aerospace alloy Narrow