http://www.bestscooterstore,com/products/Tilt-Theorem-Pro-Scooter.html Product Description Description The stunt scooter Tilt Theorem is basically a kick scooter on steroids made for tricks in the streets. Having a lightweight aluminum 6061 bar is advantageous for reaching new heights with your scooter. In addition, the SCS compression system gives you a very smooth spin experience with easy maintenance. Street-oriented Tilt pro scooter with a wide deck that is comfortable to ride and ideal for grinding all over the place Box-cut deck, bringing you full deck-length grindability with ample foot-space, making it perfect for street riding Specifications Model Total height Wheel diameter Weight Bar width Deck length Deck width Bar height Wheel hub width S 85cm 110mm 123.18oz 508mm 20" (50.8cm) 5" (12.7cm) 584mm 24mm M 88.5cm 110mm 129.6oz 533mm 21" (53.3cm) 5.5" (14cm) 635mm 24mm L 93cm 120mm 142.4oz 559mm 22" (55.9cm) 6" (15.2cm) 673mm 30mm Compression type: SCS Headset type: Integrated 1 1/8" Fork type: Threadless Material: Aluminum 6061 Dropout Shape: Box-cut Headtube angle: 83° Concave: Yes Fork design: One-piece Bar Shape: T-shaped Bar material: Aluminum 6061 Bar outer diameter: 35mm (Oversized) Bar inner diameter: 32mm Backsweep: No Clamp size: Quad Wheel profile: Round Wheel hardness: 88A Core material: Aluminum 6061 T6 Core design: Spoked Axle diameter: 8mm Bearing precision: Not specified Brake type: Flex Fender Assembly: Partly assembled