These are for use with 104 BCD chainrings or 64 BCD chainrings on 104 BCD cranksets

Smooth centerline for efficiency with diamond-shaped outer knobs for grip in the dirt

Bulletproof Lens impact tested to: ANSI Z87

17mm and 18mm

Note: Unfortunately this is not for use with dropper posts

DHaRCO Men's Long Sleeve Tech Tee - M - Pipe Dream eBay These are for use withGiving you the comfy feeling of cotton with the technical features of DriRelease fabric, the DHaRCO Men's Long Sleeve Tech Tee is perfect for both riding and casual wear in cooler conditions. The great thing about DriRelease is that the tech that keeps you cool, dry, and fresh is built into the fibres themselves rather than just applied to the surface. This means that the effectiveness of the material won't reduce over time as the treatment won't wash