Hammerhead Mounting System - 31.8mm Giant-Imported The back of a helmet

The back of a helmet has a huge impact on how well ventilated it is

The braze-on version weighs about 50 grams less than its electronic counterpart

Lefty Hyb 32

With a 17mm internal width

lightweight (29g) design ensures all-day comfort

Hammerhead Mounting System - 31.8mm Giant-Imported The back of a helmetWe designed the all new Hammerhead Karoo Mounting System from the ground up to be stronger, lighter, lower profile, and easily adjustable, making it the best mounting solution available. The updated 31. 8 handlebar mount, included with every Karoo, allows for hassle free Installation. 12. 5mm adjustable fore aft position allows you to fine tune how close your Karoo is to your handlebar. Handlebar fastener is fully captured for easy install and no lost