Tempish Chassis Schell 3 frame, with three 90/100/110mm wheels, mounting hole spacing: 150-165mm. SCHELL frames are very strong and easy to control. Made of AL 7000 alloy. Key features: Intended use: Speed, inline skating for advanced, experienced skaters. Lite monolith frame, 3D construction, special duralumin alloy, fixed center position with adjustable screws, HI-POLISH ALUX surface finish.