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To All of Our Amazing Customers: 
We would like to clear up some confusion about the future of our shopping center. 7 Mile Cycles is not being torn down, moving or closing its doors anytime soon! Our shopping center is going to be redeveloped and we will be moving into an all new space sometime in 2024!
We are very excited to see this project come together and look forward to our ALL NEW store!
Click here to see the proposed development!

BOX One Chain Tensioner 10mm x 2 Axle Hole

BOX One Chain Tensioner 10mm x 2 Axle Hole
  • Color: Black
  • Color: Red
  • Color: Silver
Please select options


Box One Chain Tensioners are extruded then CNC-machined from 7075 aluminum for an optimal balance of strength and weight. A minimalist design adds style while reducing their overall mass. Laser-etched graphics include wheel position guides and two 10mm mounting holes with 15mm of adjustment to ensure perfect adjustability. Fits most frames every time you remove and replace your wheel.

When used correctly, Box One tensioners will protect your frame dropouts and hold your rear wheel in place. Keep in mind. However, they aren’t indestructible (neither are your dropouts). Install these lightweight chain tensioners with care and leave the 15-inch breaker bar in your toolbox.

- New and Improved
- 45mm of Adjustment
- XO Skeleton Design
- Dual-Sided Adjustment Grid
- Dual-Color Adjustment Block

- Axle Size: 10mm (3/8") only
- Material: 7075-T6 Aluminum
- Hardware: Stainless Steel

Part Numbers

Option UPC MPN
Black 616043831985 BX-CT1-2X10M-BK
Red 616043832005 BX-CT1-2X10M-RD
Silver 616043832012 BX-CT1-2X10M-SL