From the Manufacturer: The FR1 310 are equipped with a 230mm frame

1oz Thinsulate on palm side

measure the circumference of your head starting in the middle of your forehead and match it with the sizes below: XS/S 20 – 21

They are higher

Superfeet CARBON Pro Hockey is a genuine game changer

Proto-Full-Knuckle SCS V2 Oversized 4" (Gold) Fasen From the Manufacturer: The FR1The PROTO Full Knuckle SCS is the original and first Standard Compression System. It fundamentally changed the way a freestyle scooter was built and effectively revolutionized the freestyle scooter after market parts industry. The Full Knuckle SCS is still the strongest and most universally compatible SCS ever created. The Full Knuckle SCS is built to perform and last and carries a lifetime warranty on cracking. Made of High Grade 6061 T6 Aluminum.