Endless 90 Frame - Trinity MountMultiple setups: 4x90 or 3x110 Endless 90 Frames are precision made, with the Endless 90 being great for urban and freestyle skaters. This one frame can accommodate 4x90 & 3x110 wheel setups to suit your mood on any given day. Precision machined to skate a balanced rocker setup when skating 4-wheel setups, and flat for 3x110. Suitable for any skill level. Endless 90 Frames accommodates both 4x90mm & 3x110mm wheel setups. Recommended for all skill levels, it skates a balanced rocker for the 4-wheel setup and flat for the 3x110. Endless Frames have become quickly popular due to their response and feel. Features:Mounting: Trinity 3 PointMultiple setups: 4x90; 3x110Balanced Rocker for 4-wheel setupsFlat configuration for 3x110 setup (bullet profile wheels only recommended)Recommended for all skill levelsBoot compatibility: Some of the Powerslide fitness skates may have very small clearances when using brand new 110 mm wheelsWheelbase: 276 mmIncludes: 2 frames and 8 axlesCNC-machined from 6061-T6 aluminumWeight = 289 grams, without spacers and axlesBrake compatibility:4x90: Powerslide Urban Brake Size M (may requires modification) 3x110 Powerslide Urban Brake Size L / FR Skates 3W Brake 165, UFS, and Trinity Frame Comparison What's the difference between 165/180, UFS, and Trinity frames? There are three primary mounting standards when it comes to inline skate boots used for all types of skating other than speed skating. It's important to know which mounting interface your boot has so that you can choose the correct Endless frame. These three mounting types are not interchangeable with one another. In other words you cannot fit a Trinity frame to a UFS boot, nor can you fit a UFS frame to a 165 raised heel boot.