The quadrum is designed for street its 52 132 mm wide which makes lacing 50s a snap and gives you more control when developing the deck we dug out features from our early days like the square tail from our sigma and extra wide grind rails from our 2012 epsilon deck the boxed shape eliminates the need for pegs and rugged welds prevent bending of the dropouts 1 wide grind rails 45 mm give you more control on rails and ledges and prevent catching we also increased the headtube angle to 8