Giro Quarter Helmet - L - Matte Black - AS-NZS 2063-2008 Standard eBay It will only fit 46mm

It will only fit 46mm ID (internal diameter) press fit frames

spindle and bottom bracket relationship

or you dislike bulky tools

surfaces and materials

Giro Quarter Helmet - L - Matte Black - AS-NZS 2063-2008 Standard eBay It will only fit 46mmGiro's lowest profile helmet, ever! The Quarter is optimized for street, skate park, and dirt jump riding. Capable of taking multiple impacts, the external shell is abrasion resistant, so no matter what you hit your head on, this helmet will keep functioning and keep looking good while doing so. Multiple sized, replaceable, sweat absorbent foam pads help keep your head cool and provide that perfect fit.