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*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. If you are new to us, please know that we extend repair priority to folks who set up appointments. To schedule a repair appointment, click thru to our online appointment system below. COVID-19 is still a risk. 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

Black Ops Micro Drive
  • Color | Size | Speeds: Black | 25T | Single
  • Color | Size | Speeds: Black | 28T | Single
  • Color | Size | Speeds: Black | 30T | Single
Please select options


- CNC machined 6061-T6 alloy
- Fits 1-piece and 3-piece BMX cranks - 23.8mm hole for 1-piece cranks with shims for 19/22mm 3-piece cranks included
- Hard anodized coating
- Unique, 1/8" quiet drive technology
- Mount Compatibility: 1-piece/3-piece
- Chain Compatibility: 1/2" x 1/8"

Part Numbers

Option UPC MPN Store SKU
Black / 25T / Single 072774218561 21856
Black / 28T / Single 072774217915 21791
Black / 30T / Single 072774219032 21903 210000008332