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Challenge Gravel Grinder Race Tire

SALE: $50.99ea.
MSRP:$59.99
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With an eye towards long demanding gravel rides like the Dirty Kanza, Trans Iowa, and others, Challenge presents the Gravel Grinder Race Tire.

While many of Challenge's previous tires are right at home on gravel, they wanted this one to be specially tailored for longer, more demanding rides where tire width and flat protection are at a premium. To this end, they gave the Gravel Grinder Race their Double Puncture Protection System (PPS2) and spec'ed it with a generous 38mm width, resulting in great durability and dependability with comfort and stability on uneven and loose terrain. With file tread in the center, the Gravel Grinder roles smoothly, but still grips turns thanks to its more aggressive shoulder knobs.

The Gravel Grinder Race Tire is available in 700c x 38mm (38-622 ISO). Inflation range 45-80 PSI. 120 TPI casing. Claimed weight of 408 grams.

ISO (ETRTO) Size: 38-622 

Max Pressure: 80 PSI

Threads Per Inch: 120 TPI

Made in: Thailand 

Black - 700 x 33mm

Weight: 408 grams

Black/Brown - 700 x 38mm (Tube only)

Weight: 408 grams

Black - 700 x 38mm (Tube only)

Weight: 408 grams

Black - 700 x 42mm (Tube Only)

Weight: 425 grams

Black - 700 x 38mm Tubeless Ready

Weight: 355 grams

Black - 700 x 42mm Tubeless Ready

Weight: 355 grams

Ordered by Most Relevant First
5 stars
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(33)
(6)
(1)
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(83%)
(15%)
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Reviewed 8/8/2018
by Anonymous
Central Indiana
Overall Rating
1 of 1 customers found this review helpful.
Excellent budget tires

I've got a few hundred miles on these tires now-a pretty even mix of good aged chip & seal, fresh loose chip & seal, crappy patched and potholed chip & seal, and plush marble-sized river-rock gravel. I don't notice any real rolling resistance on pavement, and they stick like Velcro even in the really deep gravel. I haven't climbed much, but the bit of climbing I've done was fine and more importantly I had full control on the descent. I am running them with tubes at 55ish psi, haven't had any flats (punctures aren't likely here, no thorns or sharp rocks) and they do a pretty good job at smoothing out all but the worst bone-shakers. I'd definitely recommend these as a good all-around tire.

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Reviewed 8/23/2018
by Viva velo
Cycling Enthusiast
Grand Junction.Co
Value Rating
Overall Rating
On road off road perfect

Not slow on pavement and very stable and quick on dirt roads and tracks. This is the one tire for everything on my Specialized Crux.

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Reviewed 5/16/2017
by Kahola Kahuna
Cycling Enthusiast
Flint Hills KS
Value Rating
Overall Rating
15 of 15 customers found this review helpful.
Go To Gravel Tire

I live in Kansas and am from Emporia, the heart of Dirty Kanza and Flint Hills territory. I have used these tires thru 3 Dirty Kanzas, 2 Almanzos, 1 epic fail at Landrun(mud and weather, tires were fine) and countless other rides and races through Flint Hills Gravel. Two flats, both were pinch flats and totally my fault for running too low of pressure under my 190 lbs. About 53-55 PSI rear and 48 PSI front seems to keep me out of pinch flat trouble even in the Flint Hills Gravel. Rolling resistance is minimal on hard pack, yet traction remains great in the loose stuff. They do tend to wear a little fast, but at the price and weight well worth it. As a side note, on the two flats I did have, they go on and off the rims using no levers for a quick change under the stress of race conditions. In gravel cycling the tire of the moment always seems be in every conversation, but I have found no need to experiment or go tubeless with these tires around and will continue to run the Gravel Grinders.

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Reviewed 1/11/2017
by TK
Ohio
Overall Rating
1 of 1 customers found this review helpful.
Worked well for me

Got these for my CX bike and a gravel race. Running them with latex tubes. Race had some single track with hills and some mud. Surprised how well the gripped. Have now been running them on pavement and see that my average speed is not much slower than on my road bike. No flats. Very pleased.

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Reviewed 6/24/2018
by Slade
Cycling Enthusiast
Fort Collins, CO
Value Rating
Overall Rating
Bites hard in corners

I've ridden these for 2 seasons and, overall, I like them. They roll fast on pavement and dirt, they wear well (still plenty of life left on mine - I rotate FR each season), I have yet to get a flat, and they're a good value on sale thru BTD. My one con is that they bite hard in corners, especially in loose gravel and dirt. My go-to loop is a mixture of pavement, graveldirt roads and some fast stretches of singletrack. I find that when I take a loose corner at speed, these will start to slide at first and then bite hard as the outer lugs grip. For that reason, I'd say they're best suited to dirtgravel roads (as the name implies) than high-speed singletrack. It's not a deal-breaker for me, but you do need good bike handling skills so as not to over-correct.

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Reviewed 10/4/2014
by Bnystrom
Cycling Enthusiast
Nashua, NH
Value Rating
Overall Rating
20 of 20 customers found this review helpful.
Lives up to it's name admirably!

I needed tires for a dirt road event in Vermont and after reading a lot of reviews, I settled on the Gravel Grinders. I wanted something wide, with reasonable rolling resistance on paved roads and hard-packed dirt, but aggressive edge lugs for cornering in looser conditions. This tire has all of that and excellent durability, too. I couldn't be happier with their performance.

FYI, at 174, I ran these at 50/55, frontrear and that was perfect on a hard-packed course. My 110 girlfriend ran them at 30/35.

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Reviewed 7/18/2014
by Chicago J
Cycling Enthusiast
Chicago IL
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15 of 17 customers found this review helpful.
Perfection for commuter-training or Outright Gravel Road Racing!!

Prior to this I have been racing on Challenges high end open tubular Grifo XS in 33mm and soon its high end open tubular Gravel Grinder in 700x36mm tire. For training and commuting I do not want to burn through [$] high end tires when I can burn through the same tread for less than half the money and have an even tougher casing than the open tubular design saving them for race day! For training I have been riding every type of nail file tread pattern I could buy, My favorite up until this tire was released was in this order, Clement Las 33mm (actually a 36mm)for fast gravel country roads and finer gravel, or for rougher gravel Clement USH 35mm, Vittoria Pro XN 32mm(actually 30mm), Schwalbe Sammy Slick 35mm (actually a 31mm), and for rougher gravel and dirt Kenda Happy Mediums in 35mm or 40mm (both slightly undersized as well. I hope that Challenge continue to make Vulcanized Versions of its already top OT tires like The Grifo Pro now, as I wish they would make a Grifo XS 32mm vulcanized soon for my wife as this is her favorite tire! Do your self a favor and get this tire, it is the best!

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Reviewed 4/21/2018
by jamisjockey
Cycling Enthusiast
Virgina
Value Rating
Overall Rating
Wow! Maybe a little narrower than advertised

I've only got one ride on these but I'm super happy with them! My clement tires aren't very confident cornering, even on the road. These challenge tires transition real well in corners and lock up nicely on gravel. Reasonably fast on road or dry hardpack as well. Corner well in gravel.

I mounted them on a pretty narrow pair of road rims (vuelta) and my micrometer says they're more like 32's on these rims.

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Reviewed 4/2/2018
by John
Cycling Enthusiast
Maryland
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0 of 1 customers found this review helpful.
BTD is an awesome place to shop

Great product, especially on sale

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Reviewed 7/20/2017
by runningisfree
Cycling Enthusiast
Wayne, PA
Value Rating
Overall Rating
Durable, versatile tire for all season use

I use on my cross frame which doubles as a commuter. I pump up tire to 65 psi and it gives a comfortable ride.

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Reviewed 6/24/2017
by Anonymous
Cycling Enthusiast
Louisville ky
Value Rating
Overall Rating
1 of 1 customers found this review helpful.
Sweet, tough tire for Hoosier gravel

Originally went w the 33s for tackling the (awesome!) Hoosier National Forest roads. Loved the tires but found them too narrow for some of the loose gravel. Bumped up to the 38s and they are perfect. Expertly manage the slime of sloppy lime dust but also do a better job of floating over loose gravel. Excellent on dry hard packed gravel and tough enough for the occasional bit of singletrack. Roll nicely over paved sections. About 1000 miles without a flat. Have tried them tubeless but the sidewalls leak too much - not sold as tubeless so that's fair. Great tire!

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Reviewed 6/6/2017
by Aaron
Cycling Enthusiast
Lincoln, ThereIsNoPlaceLikeNebraska
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1 of 1 customers found this review helpful.
Near perfect for use with my CX bike on gravel & mixed surface rides.

I live in the city with streets and paved bike paths, but I'm at the edge of town with gravel section roads stretching to the horizons through farmland. These tires have been a welcome upgrade over the stock 33mm tires that came on my Specialized CruX. Smoother rolling center tread, knobby on the edges to bite in the loose and chunky gravel, and enough volume to lower my pressures for a smoother ride. Near perfect.

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Reviewed 1/6/2017
by Anonymous
Cycling Enthusiast
Lawrence, KS
Value Rating
Overall Rating
Excellent tire for fast gravel riding in all but muddy conditions

Great, light gravel tire, rolls fast, stable in corners.

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Reviewed 12/26/2016
by Anonymous
Cycling Enthusiast
iowa
Value Rating
Overall Rating
tis is a fast gravel tire

many 100 mile rides no problems yet

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Reviewed 12/4/2016
by Gravel T
Seattle
Overall Rating
4 of 4 customers found this review helpful.
Solid Gravel Tire

I purchased these after experiencing reliability issues with another tire. I found myself riding hard-core gravel and wanted a tire that could withstand the punishment, but still provide good rolling resistance on pavement. For me, it was between these and the MSOs. I ran the Gravel Grinder Race for 8 months with acceptable results.

A few notes Tubeless performance was unsatisfactory. This was disappointing, but they were not sold as tubeless ready, so what can you do? This is the main reason I don't run these anymore, and why i gave only 4 stars. Another observation is those larger side knobbies. To me, they seemed like a distraction. I did not like the way they felt underneath when they engaged. It felt like the tire changed its characteristics whenever in a hard cornering situation (which is where I want it to be the most consistent). Get rid of the side knobbies, they're dumb.

The tire looks good, rolls well, and is reasonably tough. It's a good alternative to Clement MSO or even USH. Do not expect to run these tubeless. I found they wore a little faster than I'd hoped for.

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Reviewed 12/14/2017
by Anonymous
Cycling Enthusiast
upstate New York
Value Rating
Overall Rating
just what I wanted

Just what I was looking for. The larger size fits and will be usable for both paved and dirt roads. Plan to buy a 33 for my wife's bike once they are in stock.

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Reviewed 11/9/2017
by Anonymous
Cycling Enthusiast
Value Rating
Overall Rating
Super fast tires

These tires are very fast, they roll well, but still have good traction when needed.

They have good grip in gravel and the side knobs have enough grip to keep you from losing the front wheel if you hit an unexpected patch of deep sand. As expected they provide virtually no forward traction in deep lose sand.

The only downside is the 38mm tires measure out to 35mm on my wheels, but so far their performance has more than made up for being skinnier than advertised. I'll probably get about 800 miles out of the rear which is on par with other tires I've used.

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Reviewed 11/4/2017
by Jake Oakley
Cycling Enthusiast
Lehigh Valley Pennsylvania
Value Rating
Overall Rating
Purchased for FallWinter trail, road and gravel riding

I have been riding with the 700x32 tires that came with my bike - worked well in spring and summer riding. Wanted to go to 38s for fall and winter. I have been riding more canal trails and plan on continuing through the fall and winter months. Have about 250 canal trail miles on these tires - they are holding up perfectly, have PSI 55 front and 65psi rear. No flats and a very comfortable and stable ride.

Great price and quick shipping.

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Reviewed 5/3/2016
by Carl
Cycling Enthusiast
Rochester, MN
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1 of 2 customers found this review helpful.
Running this Tubeless - so far so good - DK will be the ultimate test

I set these up tubeless with Stan's no-tube cyclocross kit on standard rims (Mavic Front, Powertap alloy rear), and have been playing with various pressures between 20 and 40 psi. Have done one long race (107 miles) in Minnesota, and lots of training. Will be riding this in the Chino Grinder (Arizona) this weekend, the AlmonzoRoyal 162 next week, and the DK in June. Hoping the lower pressure will allow all of these to run a bit better than with tubes and higher pressure. So far so good. I'll update if I have any problems.

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Reviewed 9/21/2017
by Anonymous
Overall Rating
Great Gravel Tire

Bought these for Rasputitsa and they delivered. The wider version of the Chicane, these puppies hook right up in packed snow in Cyberia and the side lugs hold when it gets a bit sketchy. Bought a second set after riding these.

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