Designed by former World Champion, Olympic silver medalist and G.O.A.T contender Sam Willoughby, the Siren Pro offers BMX racers unparalleled performance on any track. Lightweight and fast-rolling, the 120 TPI, tubeless-ready tire rails turns, smooths out technical straightaways, and provides insane grip on the gate and out of corners.Supple 120 TPI shaped casing. Center slick design for gaining maximum speed. Super-narrow gaps in the center tread grip the start gate without flexing. Wider gaps on the shoulder provide max grip when cornering. Item Specifications: Color, Black, Defined Color, Black, Intended Use, BMX, ISO Diameter, 406 / 20 BMX, Labeled Size, 20 x 1.75, Tire Bead, Folding, Tire Diameter, 20, Tire Type, Tubeless Ready Clincher, Weight, 340, Weight (oz), 12, TPI, 120, PSI, SHIPS TODAY! Order before 1:30PM EST, M - F, and this item ships the same day! HAVE A QUESTION?Expert customer service by bike experts! A Real Brick And Mortar Retail Bicycle Shop with people you can talk to! Contact Us! (9-5 Mon-Fri, 12-4 Sat & Sun EST) Chat With Us