Lazer G1 MIPS Road Bike Helmet Color:Black but a 3/8" to 1/2"

but a 3/8" to 1/2" adapter is included so you can use it with 3/8" drive torque wrenches

●Sizing: Small 20"-21

the Compact DLX helmet's in-mold construction also makes it a durable choice

The SM-RT800 rotor (optional) offers even greater heat management capability than Shimano's industry-leading ICE TECH Freeza rotors

The lock ring is aluminum but the cogs are steel

Lazer G1 MIPS Road Bike Helmet Color:Black but a 3/8" to 1/2"To Plot The Future, Lazer Tapped Into Its Past. Shaving both letters and grams, the G1 road helmet has been reborn from the ashes of its predecessor, the Genesis, as Lazer's lightest bike helmet ever. How did they do it? Start with the G1's hardshell construction, which is molded from rugged and durable EPS foam construction. Running through it are 22 internal channels that afford ample venting, which Lazer says is actually 8% more cooling efficienct