Challenge Gravel Grinder Race Clincher Tire (Black) (700c) (38mm) (Folding) (Nylon)

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Expected Jun 4, 2024
Price: $44.99

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This is the Challenge Gravel Grinder Race Clincher Tire. This 700 x 38 CX tire is built for what it's name says, grinding gravel., but it is also quite a nice choice in the grass and dry courses of some North American Cyclocross races. That is, if you aren't limited to the UCI 33mm regulation, which most of us aren't. So if you are a fan of the road less traveled, or just want a tire that is at home on both hardpack and tarmac, this tire is a great addition to your machine.


  • Use: All Around Gravel
  • Size: 700c
  • Tire Width: 38mm
  • Rim Width: 17-23 mm

Tire Type: Clincher
Bead: Folding
Compound | Casing: Vulcanized | Nylon
TPI (Threads Per Inch): 120 TPI
Puncture Protection: Yes
Inflation: 45 - 80 PSI
Color: Black
Weight: 375g (700c | 33mm)

This product is expected to become available for purchase on Tuesday, June 4, 2024

Kirk Weaver
Thursday, Mar 2 2023 (about a year ago)
Challenge Gravel Grinder Race Clincher Tire (Black) (700c) (38mm)
On my third set of these on my Ridley X-Trail. Absolutely love their performance. Fast rolling on pavement and very stable on dusty hard pack and gravel. Not to curse myself, but I have yet to have a flat out on the trails. If you try them I hope you have the same luck.

Tire Size Chart

Inch SizingISO / ETRTO
16" BMX / Kids305
16" Recumbent349
18" BMX / Kids355
20" BMX / Kids406
20 x 1-3/4"419
20 x 1-3/8", 20 x 1-1/8"451
22" Wheel Chair501
24" BMX / Kids507
24" BMX Race (Fractional)
24" Road
24" Old Schwinn S-7 Size521
24" Wheel Chair540
24" Old Schwinn S-5 Size547
26" Mountain559
650c Small Road Bike571
27.5 / 650b584
26 x 1-3/8590
26" Old Schwinn S-6597
700c / 29" / 28"622
27" Road (Fractional)630
28" Track Tubular635
36" Big Bike787