DT Swiss ERC 1100 Opinions?

Everything about building wheels, glueing tubs, etc.
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Alexbn921
Posts: 230
Joined: Wed Apr 10, 2019 6:39 pm

by Alexbn921

I was able to get the GP5000 TL 28mm on the rims without too much trouble. About as bad as any new tire. Had zero problems airing them up. They simply slow slipped up onto the bead. When I deflated them to add sealant they slowly slipped back down into the center channel. They did this without letting any air out. I really wish that they where captured at the rim shoulder. Seems like the lip around the bottom of the tire is loading up and bending towards the center of the rim. This keeps it from staying on the rim bead shoulder. This seems like a tire design issue more than a rim problem.
I’m going to reduce pressure to 10psi and try to push them off the rim tonight.
Overall, they are solidly seated, but I defiantly do not want to be able to burp them.

by Weenie


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Alexbn921
Posts: 230
Joined: Wed Apr 10, 2019 6:39 pm

by Alexbn921

I was able to air down my gp5000 lt tires last night and test them for burping.
At 10psi the bead stayed in place and resisted moving into the center channel. I was able to push the tire into the center be hand with zero air loose. The bead did not recover. Pushing it into the ground also unseated the bead with full collapse of tire with zero air loose. Even aggressive pealing of the tire all the way over resulted in zero air loose.
At 20psi I was unable to push the bead fully off and it would recover with zero air loose. I was still able to collapse the tire completely off the bead pushing it into the ground sideways with zero air loose. Each time the bead would fully recover.
At 30psi the tire would only semi fold over and would not full collapse, no matter how hard I tried.
Overall, I feel much better about running this combo as burping is extremely unlikely. In the case that you are running severely under inflated (sub 40psi), then a complete collapse of the tire in a big G out is possible but would most likely affect a tubed tire in a negative way as well.
Mountain bike rims have a much larger shoulder that supports the tire and the bead is not nearly as strong. Even if the DT rims had a retention ridge it would not be able to keep the tire on the small shoulder area with a full sideways tire collapse. Most mountain rims burp once the tire is moved into the center channel. The extra rubber on the bead of the GP5000 seems to prevent this.

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Alexbn921
Posts: 230
Joined: Wed Apr 10, 2019 6:39 pm

by Alexbn921

I love gold!
Front.JPG

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TonyM
Posts: 3263
Joined: Thu Jan 22, 2015 4:11 pm

by TonyM

Wow that looks indeed fantastic !

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