surly old man
Join Date: Sep 2006
Location: Carlisle, PA
Bikes: IRO Mark V, Karate Monkey half fat, Trek 620 IGH, Cannondale 26/24 MTB, Amp Research B3, and more.
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Others will have specific advice for you on this, but why do you think you need tires that can carry heavier loads. Being fairly beefy tires (at least by modern standards), I would think those tires could lift quite a load off the ground. Are you airing them up as much as you can? After all, its air, not rubber that keeps your rim off the road.
Cross Check Nexus7, IRO Mark V, Trek 620 Nexus7, Karate Monkey half fat, IRO Model 19 fixed, Amp Research B3, Surly 1x1 half fat fixed, and more...