Tire Coupling Element Angular Misalignment 4 Degrees Coupling Size WE4 Horsepower @ 100 RPM 0.88 hp Maximum Speed 7 500 RPM Maximum Torque 550 in-lb Maximum Hub Spacing 0.25 in Tire Outside Diameter 4.52 in Element Overall Length 4.68 in Parallel Misalignment 0.0625 in Element Type Standard Center Element Weight 1.2 lb Application Blowers Compressors Fans Generators Numerous Industrial Applications Including Pumps Motors Element Flex Material Polyether Urethane