Challenge Gravel Grinder Race Tire - Tubeless, Folding, Black Bike Accessories Brand_Shimano The Standard Bearing has ceramic

The Standard Bearing has ceramic CS balls and hardened-steel races

Even off road

Integrated

Shimano Deore

Challenge Gravel Grinder Race Tire - Tubeless, Folding, Black Bike Accessories Brand_Shimano The Standard Bearing has ceramicIntended for all around or dirt gravel roads, this tire comes equipped with a file tread center and a knobbier shoulder tread. File tread center pattern offers low rolling resistance on smoother terrain and increased grip when the road gets rough Shoulder tread is more aggressive for corner confidence and additional control The Gravel Grinder is ideal for hardpack, gravel, sand, loose, and rocky terrains