I think I'd suffer the weight penalty of regular butyl tubes if latex is off the cards. I've yet to hear anyone give positive impressions of tpu tubes and have seen a lot of bad ones including blowouts
I've been running them for ~2k km with no issues, admittedly i don't ride in London anymore. The streets round here aren't so mean
@dominijk started
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I think I'd suffer the weight penalty of regular butyl tubes if latex is off the cards. I've yet to hear anyone give positive impressions of tpu tubes and have seen a lot of bad ones including blowouts