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ChallengeGravel Grinder TLR Tubeless Tire


Item # CNG000T

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  • Black, 42mm ($67.99)
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Item # CNG000T

Gravel Grinder TLR Tire

Challenge is already quite well known among the cyclocross community offering supple casings and treads to tackle various conditions on courses across the globe, so it only makes sense for the company to focus this attention into the burgeoning gravel world as well. The Italian firm has come out swinging with some excellent options and the Gravel Grinder TLR Tire is one were very excited to try off the beaten path. Developed for harder packed dirt roads or stringing up and an all road adventure with just enough tarmac between the fun bits, the tread is very similar to its 'cross-going Chicane model, however, the widths are optimized for riding and racing outside the course tape offering better grip and traction over looser surfaces. That higher volume, along with the ability to run lower pressures thanks to its tubeless construction, contributes to a smoother ride, letting you save energy and gain confidence while providing the durability needed while exploring uncharted territory.

The Gravel Grinder TLR has a fast rolling center file tread pattern with aggressive side knobs so you're fast on the pavement and hardpack while still offering impressive traction over looser terrain and while cornering hard. We're most excited about the ability to run some sealant and enjoy the security of riding and racing over sharp flits and goatheads without losing time or DNFing because of an excessive amount of flats. The tires are offered in 33, 38, 42, and 46mm options so you can find the right speed/comfort/grip combination for your local gravel and riding style.

  • Challenge's fast rolling gravel tire now tubeless ready
  • Aramid folding bead is lightweight and durable
  • 120tpi keeps the tire supple over the bumps
  • Various widths allow for maximum course and bike compatibility
  • Center file tread lowers rolling resistance while the aggressive side knobs dig in

Tech Specs
Size700c x 33mm, 700c x 38mm, 700c x 42mm, 700c x 46mm,
Recommended Usegravel
Manufacturer Warrantylimited

Actual Weight

Black, 42mm

Actual weights are measured in-house by the Competitive Cyclist team.

Have questions? Chat with a Gearhead

What do you think about this product?


>Rating: 1

Trash Product

Sidewall tore after 70 miles. Total rides on tire: 1. Clearly a defective product and Competitive Cyclist refused a return. Disappointed in both manufacturer and retailer. Total failure. Buyer beware.

>Rating: 4

Bought again

I've put it through the wringer
True to size
Size Bought
6` 3"
168 lbs

Fast on pavement. Great for NE gravel. Never had a problem. Good tire all around, got a full year (3-4k miles) without a puncture.

>Rating: 1


I have only ever had two tires break a bead. First time was a Challenge Grifo during a cross race. Second, mounting this tire for the first time. My ears are still ringing. Would love a refund CC. Won't be buying Challenge products anymore.


You must be doing something wrong here to be breaking beads. For example you may simply be damaging your tire when you mount it. I have never seen someone “break” a bead. I see a lot of user error reviews on backcountry and I’m not saying that’s the case but you may want to ask someone else to look at this instead of just blaming the equipment.

>Rating: 5

worked great on White Rim

I've put it through the wringer

I used the 700x42 as a rear on my Pinarello gravel bike and rode the White Rim trail and had no issues with the tire. It rolled fast, gripped well, and has not suffered any damage despite being subject to many rocky, ledgy drops and some rockier mountain bike trails. It was pretty easy to mount on a FSA Vision Trimax 30 rim with a compressor to seat the bead. I don't know what this other person was talking about as far as sandy jeep roads go the White Rim consists largely of sandy jeep roads and this tire worked great in areas other than super deep sand and climbs too steep and sandy to ride anyway. I did not notice any issues with grip on the climbs. The center tread is pretty "slick" but I wouldn't say they slip on climbs anymore than any other knobby mountain bike tire would slip on a steeper climb.


If you buy this does it come in pairs?

>Rating: 5

Great Versatile Tire

I've put it through the wringer

I have used these tires for gravel races as well as my weekend road training rides-- typically around 40 miles long. I think they roll really well on the pavement, especially for how durable they are. Off road, I find they have good volume for comfort and surprising grip on fast fire road descents. I am most pleased with their durability. I had a road tubeless tires on before (pavement only of course) that punctured on seemingly every long ride. I have had these on for about 1,200 miles without a single puncture. I will definitely buy again.

>Rating: 3

kind of meager

Not a great tread for loose dirt/sandy jeep roads. Not enough bite on them even though it looks like the outside knobbies may have some heft, they're actually pretty tame. Installed for a rear tire so even more meager when you need some grip when climbing. Nice looking though!

>Rating: 5


I've put it through the wringer

This is a great gravel tire. The 700Cx38mm is a good choice for many types of gravel, dirt and sandy tracks. It also feels fast on pavement. They were quick to setup tubeless. I recommend flattening out the tires (pushing the tire beads toward the rim walls) before attempting to fill them with air. I did use a compressor, which made the job easier. The wear has been quite good, having done two 100K and two 100-mile events on moderate-to-heavy gravel with acceptable wear. They corner well with the bigger lugs along the outside of the tire. I am 175 pounds and I run these tires on Stan’s Avion Team tubeless wheels between 32-34F and 35-37R. I run the lower pressures on courses with more/gnarlier gravel and the higher pressures on courses with more pavement/less gnarlier gravel. The Avions have an internal width of approximately 22mm. The tires went on the rim with relative ease. I did soap the beads before attempting to mount them.

>Rating: 3

Very Hard to Mount!

I've used it once or twice and have initial impressions

Had to stretch these at 75 psi @ 125 degF to have any chance to get them onto 23mm wide Roval wheels. Most difficult tires I've ever mounted by far.