IRC Tire Siren Pro Tire - 20 x 1.9 Tubeless Folding Black 120tpi. 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
- TECH SPECS
| Color | Black |
| TPI | 120 |
| Weight | 385 |
| Weight (oz) | 13.5 |
| Defined Color | Black |
| ISO Width (mm) | 48 |
| ISO Diameter | 406 / 20" BMX |
| Tire Intended Use | BMX |
| Tire Diameter | 20" |
| Tire Bead | Folding |
| Labeled Size | 20 x 1.9 |
| Tire Type | Tubeless Ready Clincher |
| PSI | 100 |