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Description
Super tough. Mud ready.
EXT stands for Extreme Conditions and it's for good reason. When you want the strength and puncture resistance of the GravelKing and the ability to confidently ride through the muddiest conditions and most aggressive gravel, the GravelKing EXT is your answer.
The EXT has sides reinforced with Protite Shield technology, a bead-to-bead nylon puncture belt, resulting in a 4ply, super-tough casing. Unique to this tire is the aggresive tread pattern, designed for the most extreme of conditions; on the roads less traveled.
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.
Specifications
Wheel Size: 700C/29" (ISO 622) | |
Tire Type: Tubeless Ready | |
Threads Per Inch: 127 | |
Application: Gravel and Mud | |
700 x 33mm - Black | Mfg PartNum: RF733-GKEXT-P-B |
Tire Width: 33mm (1.3in) | |
700 x 38mm - Black | Tire Width: 38mm (1.5in) |
Mfg PartNum: RF738-GKEXT-P-B | |
700 x 38mm - Brown Sidewall | Mfg PartNum: RF738-GKEXT-P-D |
Tire Width: 38mm (1.5in) | |
Reviews
These replaced a pair of Challenge Gravel Grinder Race tires for gravel, dirt road and mixed terrain rides, so comparing to those. I got the 700x38 mm with tan sidewalls
Pros - Running these tubeless on Stan Grails and hooked up well, even after multiple moves (tried to put them on tubeless Mercury wheelset, but nothing runs tubeless on those wheels). After about 500 miles, they are wearing well with little tread wear. They provide good grip and don't collect mud in the tread. They have also been tough on rocky, rooty New England trails. They also look nice with the tan
Cons - higher rolling resistance than the Challenges so being on pavement more of a chore. Also, just a quibble, sidewall markings are hard to read
I ran these for Landrun 2020 and they were an essential part of the kit that got me across the finish line. They cut through the Oklahoma mud, gripped well when I needed them too and didnt build up too much. Extremely happy that I ran those tires for the race and happy with the way theyve worked on non-muddy gravel roads
I ran these for about 1K miles in size 38mm in a variety of conditions in the PNW, primarily Forest Service gravel and dirt roads of varying quality, plus some local dirt and root singletrack. I used them tubeless with Stan's sealant. While they provide good traction in nearly all conditions, I found the sidewalls to be pretty fragile. I had to retire them after the rear tire would no longer reliably hold air pressure after suffering many cuts that the Stan's sealant could not effectively seal. I tried gluing the worst of the cuts, but that did not help much.
If you are riding on primarily loose gravel and dirt doubletrack without rough granite or sharp shale, these may work well.
I bought these tires for my wife's Topstone gravel bike. I found that they mounted easily and sealed up well with Stan's sealant. She reports that they hook up well on the rockier sections of the fire roads on the lower part of Mt. Tamalpais in Marin County, CA. We are pleased with them and would buy them again!
Mechanic's Corner
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