Magicshine Garmin-GoPro Helmet Mount for Monteer Back in Stock Other 104 BCD sizes -

Other 104 BCD sizes - you will need 8mm bolts (stock size that comes on 3x cranksets holding the middle and big rings on)

Rotor - 6 bolt brake rotor standard

The only diameter offered is 27

This layup also ensures you have one of the strongest carbon bars on the track

Magicshine Garmin-GoPro Helmet Mount for Monteer Back in Stock Other 104 BCD sizes -The Magicshine MJ 6276 headlamp and helmet mount kit gives you the ability to mount any Garmin or Go Pro mount device to your helmet or you can use the mount to wear your Monteer bike light as a headlamp. The kit provides you with a hard plastic 3 prong GoPro mounting plate that has three strap loops, a pair of non stretch velcro straps for securing the mounting plate to your helmet, a pair of stretchy elastic straps for use as a headband and a GoPro