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A few answers to questions posed in this super-interesting discussion:
- Rim brakes are no problem. The melt point of TPU is about where butyl tubes fail (145°C or 295°F)—higher than latex, which also works fine with rim brakes.
- CO2 is OK for topping up, but initial inflation with CO2 is not recommended. The high pressure and cold temperature (as the CO2 expands) can split the tubes.
- The Rene Herse TPU tubes are made in Germany. They are not just some rebranded product you can get from other sources. (None of our products are.)
Cheers,
Jan Heine
Rene Herse Cycles
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