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Happy Spring! *New* Spring hours: M-F 11-6, SAT 10-6. (Closed Sunday). Check out our 2022 stock of Breezer, Marin, Fuji and SE for commuters, gravel crunchers, BMX and recreational riders. Do we have the Marin DSX Flatbar Adventure bikes in stock? Yes! To schedule bike repair, click thru to our online appointment system below. As of April 1, we offer repair priority to folks who set up appointments. We ask that clients be masked and vaccinated when they enter our store. We commit to returning that favor. Questions? E-mail us at or text/call us at 510-328-1158.

Black Ops Micro Drive Dual Core UL

Black Ops Micro Drive Dual Core UL
  • Color | Size | Speeds: Black | 25T | Single
  • Color | Size | Speeds: Green/Gray | 25T | Single
  • Color | Size | Speeds: Purple/Black | 25T | Single
  • Color | Size | Speeds: White/Gray | 25T | Single
Please select options


- Fits 3-piece 22mm BMX cranks
- 2mm 6061 aluminum core
- Includes adapter for 19mm spindles
- Teeth: 25T
- Chain Compatibility: Singlespeed
- Tooth Type: Standard

Part Numbers

Option UPC MPN
Black / 25T / Single 072774222438 22243