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Greetings! Proudly celebrating 9 years of cycling magic in the Laurel District. Enjoy new LOWER prices on Marin, SE, Fuji and Breezer in stock. Wait time for most repairs is 1-3 days. Flat fixes are same day if brought in by 12pm. Our December 2023 hours are: M-F 11-6, SAT 10-5. Closed 12/24-12/28. Questions? E-mail us at or text/call us at 510-328-1158.

BOX Four 8 Speed E-Bike Cassette

BOX Four 8 Speed E-Bike Cassette
  • Color: Black
12 – 42T
Please select options


The Box Four E-Bike Cassette offers high gears with more teeth to withstand the rigors of modern E-Bike riding. Adding an extra tooth to each of the three highest gears provides increased durability and decreased wear by distributing the load over a larger area! Box Four adapts our Prime 9 philosophy of durability, simplicity, and reliability at a great price point. All cogs are stamped from steel, given our durable black coating and then the larger cogs are pinned to each other with spacers for easy installation.

- Our 8 is Enough Cassette
- Steel Stamped Cogs
- No Spiders
- Wide Ratio & Consistent Progression

- Cogs: Stamped / Hardened Steel
- Spider: Stamped / Hardened Steel
- Lockring: CNC / Hardened Steel

- Finish: ED Black
- Speeds: 8
- Gear: 12 - 14 - 16 - 18 - 22 - 28 - 34 - 42
- Weight: 485g/17.1oz

- Platform
- Non-Ebike
- Driver: HG Freehub Body
- Chain: Box Four 8 Speed

Part Numbers

Option UPC MPN
Black / 12 – 42T 616043832876 BX-CS4-08A1242-BK