20x1.90 IRC Siren Pro Tubeless Ready BMX Race Tire - 100psi - Black 1.60 The MCS spider is made

The MCS spider is made from aluminum and works with 5-bolt

it squeaks

Back sweep: 8 degreesUp sweep: 3 degreesRise: 6" Width: approx 28 inches

This is a pair of tubeless Schrader valves made from lightweight alloy with removable cores

20x1.90 IRC Siren Pro Tubeless Ready BMX Race Tire - 100psi - Black 1.60 The MCS spider is madeDesigned 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. You may want to bump up your gearing because youre going to be cruising quicker than ever with the Siren Pro. Sam