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Challenge Almanzo PRO Tire 700 x 33mm - Black/Tan
Challenge Almanzo PRO Tire 700 x 33mm - Black/Tan
700 x 33mm - Black/Tan
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Challenge Almanzo PRO Tire 5
Challenge Almanzo PRO Tire 6

Challenge Almanzo PRO Tire

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The Gravel Go-Getter

The Challenge Almanzo Pro Tire is named after the Almanzo 100 gravel race in Minnesota, making this a heavyweight all-terrain tire for use with road bikes. The Almanzo was designed specifically for gravel racing, featuring a file tread pattern that provides excellent grip with a wider, more forgiving profile for those bumpy roads. Each Almanzo Pro tire features Challenge's double puncture protection, offering the highest level of protection from slashes, tears, or other types of punctures.


  • ISO diameter: 622.
  • ISO width: 33mm.
  • SuperPoly casing.
  • Double PPS Protection.
  • 260 TPI
  • Claimed weight: 385 grams.

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

The product weight specified is an approximate weight based on the manufacturer's specifications (if available) or our measurement of one or two examples. For most products, the weight will typically vary by 5% to 10%.



Weight: 385 grams


Wheel Size: 700C/29" (ISO 622) 


Tire Width: 33mm (1.3in) 


Tire Type: Clincher-Folding 


Threads Per Inch: 320 

700 x 33mm - Black/Tan

Mfg PartNum: 00524 


Ordered by Most Relevant First
5 stars
4 stars
3 stars
2 stars
1 stars
One of my favorites so far, but extremely hard to mount.
by Colorado cyclist
Cycling Enthusiast
1 of 1 customers found this review helpful.

Predominately road surface and chip and seal.

Reviewed 7/25/2019
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Nightmare to mount
by NorCal Biker
Competitive Racer
Santa Rosa, CA

Mounted tires for 30 years without major problems. These tires however are a total nightmare to mount.

Pre-Stretching, heating up, Talcum powder....still unmountable on DT Swiss rims. Gave up after hours of trying.

All 4 tires went straight in the garbage. Even if I could have mounted them at home, on the trail in cold weather there is no way you can fix a flat.

Reviewed 8/7/2020
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No issues
by derekhski
Competitive Racer
Portland, OR

Picked up a set of the Tan wall Pro Series version, Fun mixed surface and supple tire, 260 TPI

Rides really well for a great dry dirt, gravel, even cross legal at 33C Have larger tires for rough days.

No issues mounting, put them on some older American Classic 420's,, they are tight, all Challenge are.

Reviewed 9/25/2020
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Do not buy
by Anonymous
Cycling Enthusiast
0 of 1 customers found this review helpful.

Im issuing a rare DO NOT BUY. I have changed many tires before but These are the first I that could not get mounted (Zipp 303 rims). After an hour of struggling to get one tire on I gave up, just way too tight. Figured if one flats on the trailroad I could never change.

Reviewed 4/18/2020
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Excellent Gravel Tire
by John McBurney
1 of 1 customers found this review helpful.

Beautifully made open tubular. Very fast tools well. Grippy but sheds mud well.

Reviewed 11/19/2018
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