cyclingdeal conversion kit fixie bike single speed compatible with shimano sram cassette freewheel hub adaptor - for mountain and road bike gear cog spacers 18 teeth cyclingdeal compatibility: convert a multi speed hub to single speed wheel. compatible with all shimano or sram 7 to 11 speed cassette type hub body, mountain and road. note: it will not covert the hub into fixie, so the hub is still a freewheel hub.<br/>chain size: the sprocket is compatible with the chain width from 1/2" x 3/32" to 1/2" x 11/128". ( 7 speed to 11 speed chains). you can use your original chain! with a choice of different sprocket teeth selections, you can always get the perfect pedaling ratio.<br/>perfect chain line: the kit includes a set of single speed spacers, lockring and sprocket.comes in a range of spacer size's allowing to get a perfect chain line. please watch the video in the listing for more details.<br/>package: spacers: 2x 10mm, 1x 5mm, 4x 3mm. hub ring nut (lock ring): quality alloy 6061. sprocket: cro-mo steel construction ensures reliability.<br/>