RMD Bike Co. 22&2 sprocket 3pc BMX MTB Dirt | 23T 25T 28T | Black or Red | Made in Poland | Classic RMD Bike Co. Style for BMX MTB Dirt bikes. MADE BY US IN POLAND. available with 23T(60g), 25T(62g), 28T(77g). Colors: Black and Red material: AL7075-T6, CNC'ed, compatible with 1/21/8" chains Two axle adapters (19mm and 22mm) included Fits standard gear bolt that comes with 2-pc and 3-pc cranks