The Endless 90 inline skating frame is a precision-machined, multi-setup frame designed specifically for the Seba/FR Skates FR series of freeride skates. Endless 90 Frame Introducing the Endless 90 Frame. This frame is a precision-machined, multi-setup frame designed specifically for the Seba/FR Skates FR series of freeride skates and other 165 mm compatible skates. NOTE: This frame requires a 165 raised heel boot. It IS NOT compatible with UFS or Powerslide Trinity boots. Features Features Endless 90 Frame features: Multiple setups: 4 x 90, 3 x 110 Balanced Rocker for 4-wheel setups Flat configuration for 3x110 setup Wheel Compatibility: Bullet profile only for 3x110 setup. Please ensure the wheel profile is listed as "bullet"; other profiles such as "round," "race," or others may not be compatible. Recommended for all skill levels Recommended for boot sizes 40 (260 mm foot length) and above Mounting: 150, 165, 180 mm Boot compatibility: Some boots may require modification or a washer between the frame and boot to allow clearance for new 110 mm wheels in the 3x110 setup: size 47 (US 13) Twister Edge (we recommend the Endless 100 instead for this size boot), Adapt GT/GTS/GTO Note: on Adapt skates our frames are not optimally centered Not compatible with UFS boots (including FR Skates UFR) Wheelbase: 276 mm Brake compatibility: 4x90: Powerslide Urban Brake Size M (908058/2)—may require modification to fit 3x110: Powerslide Megacruiser 125 (907029), FR Skates 3W Brake (FRBRK-3W) One frame set includes 2 frames and 8 axles CNC-machined from 6061-T6 aluminum Weight = 292 grams, without spacers and axles Technical Specifications Technical Specification