No lightweight tube for continental GP 5000?
Moderator: robbosmans

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Ridenow and gp5000s. no issues. Supersonic tubes (<50g) before that, no issues.
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Blame lawyers.buddyguy wrote: ↑Fri Mar 24, 2023 7:17 amInstalling a new set of continental GP 5000 tires and noticed the instructions include a diagram where it shows a checkmark next to an inner tube that lists " Race > 70g and a big X over a lightweight tube. Does this mean I shouldn't use lightweight tubes like tubolitos? See photo.
The context for that warning, at least from the Continental tyre mounting instructions I've seen, is '...for rim brake bikes'.buddyguy wrote: ↑Fri Mar 24, 2023 7:17 amInstalling a new set of continental GP 5000 tires and noticed the instructions include a diagram where it shows a checkmark next to an inner tube that lists " Race > 70g and a big X over a lightweight tube. Does this mean I shouldn't use lightweight tubes like tubolitos? See photo.
Mounting Instructions
The concern behind the warning is about overheating of lightweight tubes caused by continual, prolonged braking during a descent. The linked document gives some good, and some very bad - a rim strip doesn't protect an innertube from rim sidewall heating - additional advice on reducing that risk.
I've used 'Continental Race Light' butyl tubes for 10,000km plus in a hilly area on a rim brake bike perfectly safely, so far. I'm still plucking up courage to use lighter weight tpu innertubes because of this risk. You'll find plenty of advice within the 'Ridenow tpu' thread.
Yeah, doesn't look good.


I used latex the last two years with one flat I believe. I'm riding with rim brakes in a hilly area, but no mountain descents. I'm use RideNow TPU currently since my latex tube valves were too short and I need to get some extenders.

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