Conversions

The Box One 31.8 shifter clamp is an accessory that converts any Box shifter to be compatible with modern drop-handlebars found on gravel, cyclocross, and commuter bikes
Hinged clamp design is easy to install without having to remove grips or tape
Compatible with all Box shifters as well as some other brands
31.8mm clamp only, shifter or brake not included

Perfect for mounting downtube shifters on bikes with no braze-ons
Machined alloy construction
Fits frame tubes 28.6 (1-1/8`) to 31.8 (1-1/4`) (w/ shim)
Black anodized finish