Challenge Tires Gravel Grinder

- File tread pattern center with large side knobs for optimized rolling speeds and cornering confidence
- Double Puncture Protection system helps to prevent flats
- Use: All Around Gravel
- Size: 700
- Tire Width: 42 mm
- Internal Rim Width: 17-23 mm
- Weight: 375 gr
- TPI: 120
- Bead: Aramid
- Casing: Nylon
- Flat protection: PPS
- BAR: 2.5-4
- PSI: 35-60
- Color: Black-Black