Wheels Manufacturing Angled Spacer Single Speed Conversion Kit is a Shimano- and SRAM-compatible single speed conversion kit with ramped spacers. Additional spacers are included to dial-in chainline. Includes: - (2) - 9mm angled spacers - (6) - 3mm spacers - (2) - 1mm shims - (1) - lockring - (1) - 16t cog Compatible with: - Any 1/2 x 1/8 pitch chain, this includes BMX and Track chains - Any 8 or 9-speed chain * Does not work acceptably with 10 or 11-speed chains