Challenge Gravel Grinder Pro Tire


Challenge Gravel Grinder Pro Tire


The ultimate gravel tire.

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There are a few ways to approach making a gravel tire. For hard packed dirt to small crushed limestone, a wide soft slick will get the job done. But when the going gets wet and soft the rocks get bigger, you need something a little more capable. Enter the Gravel Grinder. Like any good gravel tire, it's got the width and volume to roll smoothly on rough roads. The center section of the tread is a fine diamond pattern to provide additional traction under acceleration and braking without sacrificing too much rolling resistance, while the side knobs keep everything tidy in the corners. Though the trend in tire design is ever greater width, it is my belief that a supple tire with a sensible tread design maintains all the performance without sacrificing clearance for mud, ice, and snow that would otherwise accumulate and slow you down.

What is a Handmade Clincher?

Most tires are molded and pressed to vulcanize (bind) the rubber. Though it's a very efficient manufacturing method, the heat toughens the rubber and casing, which in turn compromises ride quality. Handmade tires are not vulcanized - instead the tread is glued directly to the casing, which is then folded and glued over aramid fibers to create a bead. The resulting tire is much more supple, and though more difficult to mount on the rim initially it stretches over the tube and gives unparalleled ride quality. Additionally, challenge tires use natural rubber for the treads, which is much softer for better and more predictable traction.


  • Diameter: 700c (ISO 622)
    • Width: 36mm
  • Casing: Superpoly, Tan
  • TPI: 260
  • Weight: 355g
  • Recommended Pressure: 45-90psi