Check the listing for details. MOJO Fixed Gear Chainring 52T - 144 BCD Track Fixie single speed 1/8" - BLACK. Color: Black, Condition: New. Listed at 23.99 USD. * High quality Alloy Chainring 52T * 144mm BCD* CNC Machined, not stamped* 1/8" width (3.18mm +/- .15mm) * For use with 1/8" chains only* Manufactured to JIS standards.* COLOR: Black finish GET THE RIGHT CHAINRING * What is your BCD? - Most cranks come in 3 common BCD (bolt circle diameter) sizes: 110mm, 130mm, and 144mm. MEASURE FIRST BEFORE YOU BUY!* 1/8" CHAINS ONLY - Will NOT work with multi-gear derailleur systems. For single-speed use with 1/8" chains. CHECK FIRST BEFORE YOU BUYWe will exchange a chainring for the correct size, if available, provided the item is still new and has not been used or mounted. Buyer pays exchange shipping. USA SELLER - DELIVERED IN DAYS, NOT WEEKS!Shipping: USPS 1st. Class $4.00 / $2.00 (All 50 states, territories, Puerto Rico, APO FPO, Palau)* High quality Alloy Chainring 52T * 144mm BCD* CNC Machined, not stamped* 1/8" width (3.18mm +/- .15mm) * For use with 1/8" chains only* Manufactured to JIS standards.* COLOR: Black finish GET THE RIGHT CHAINRING * What is your BCD? - Most cranks come in 3 common BCD (bolt circle diameter) sizes: 110mm, 130mm, and 144mm. MEASURE FIRST BEFORE YOU BUY!* 1/8" CHAINS ONLY - Will NOT work with multi-gear derailleur systems. For single-speed use with 1/8" chains. CHECK FIRST BEFORE YOU BUYWe will exchange a chainring for the correct size, if available, provided the item is still new and has not been used or mounted. Buyer pays exchange shipping. USA SELLER - DELIVERED IN DAYS, NOT WEEKS!Shipping: USPS 1st. Class $4.00 / $2.00 (All 50 states, territories, Puerto Rico, APO FPO, Palau)