The new Rene Herse TPU tubes are in this article. It&#8217s still shocking to me how tiny and mild these internal tubes are. There is much to like about them:

  • Lighter than butyl and latex tubes.
  • Lighter than tubeless sealant.
  • A lot quicker than butyl tubes or tubeless.
  • As rapidly as latex tubes.
  • Greater puncture- and pinch flat-resistance than butyl or latex tubes.
  • As airtight as butyl tubes. Don&#8217t leak like latex tubes.
  • Pack very small—ideal as backup for tubeless tires, too.

Quantities are nonetheless limited—these are made in Germany in tiny batches, which takes time. Additional tubes are in generation as we attempt to catch up with desire.

TPU tubes have been on the fringes of the cycling world right up until now, due to the fact past designs had issues with way too-thin and inconsistent partitions and mysterious leaks brought about by plastic valve stems. To solve these concerns, Rene Herse TPU tubes use a little thicker material—adding about 3-5 g to the body weight of each tube—and patented all-metal valves.

Like all Rene Herse products, we&#8217ve tested the new TPU tubes for 1000’s of miles before releasing them to our buyers. As with all new engineering, there are quite a few concerns. Right here is what you need to have to know about Rene Herse TPU tubes.

Can Rene Herse TPU tubes be employed on gravel bikes?

Rene Herse TPU tubes have slightly thicker partitions, so they are further-solid. They resist pinch flats considerably better than butyl tubes. We&#8217ve analyzed them about hundreds of miles on gravel, with out any difficulties.

Is there a utmost pressure or most rider fat for Rene Herse TPU tubes?

The utmost force is identified by your tire and rim. Rene Herse TPU tubes themselves have no rider fat limit.

Can I operate Rene Herse TPU tubes on aero wheels?

Of course. Rene Herse TPU tubes are out there with 50 mm (polished) and 70 mm (black) valves.

Why don&#8217t Rene Herse TPU tubes have valve nuts?

The smooth valve stems make it less complicated to inflate the tubes with slip-on pump heads. With tubes, the nuts don&#8217t really serve a purpose—it&#8217s actually greater if the valve can realign alone if the tube isn&#8217t set up beautifully centered.

I&#8217ve heard that for European metropolis bikes, the nut stops the valve from staying pulled inside the tire if you journey on rigid tires and overlook to re-inflate until eventually the tire strain is practically zero. Certainly, that&#8217s not something you&#8217ll at any time do on a performance bike.

Can TPU tubes be inflated with CO2 cartridges?

Inflating with CO2 cartridges is not advisable. The unexpected pressure can split the tube, particularly as the expanding CO2 is extremely chilly, which can make the TPU materials brittle. Nevertheless, TPU tubes are harmless to use in sub-freezing temperatures.

Can TPU tubes be patched?

Patching TPU tubes is uncomplicated: Wipe the tube with alcoholic beverages, then apply a self-adhesive Rene Herse patch. That&#8217s substantially a lot easier than patching a butyl tube, wherever you have to roughen the floor with sandpaper and deal with messy vulcanizing fluid.

Can I run tubeless sealant in TPU tubes to seal modest punctures?

Latex-dependent sealant will not react with TPU tubes, so it will not seal punctures. There are TPU-certain sealants—we are tests them proper now to make absolutely sure they get the job done in the true earth.

Is there everything distinctive to take into account about inflating TPU tubes?

Apart from not employing CO2, there are just the typical things to consider that utilize to all lightweight tubes. With tubeless-all set rims, the tire often seats at comparatively substantial pressures, so the tube is pressed firmly towards the sidewall. When the tire pops into spot, the sudden motion can overstretch the tube and lead to unexpected failures—with all forms of tubes. The solution is to inflate the tire in 10 psi (.7 bar) steps—especially crucial if you use an air compressor. After the tire pops into location, promptly deflate the tube so it can &#8216chill out&#8217 its condition, then inflate it yet again to the wanted pressure.

Are TPU tubes heat-resistant? Can they be made use of with rim brakes?

TPU stands for thermoplastic polyurethane, which means they are produced by melting and extruding polyurethane. Does this imply that the warmth from rim brakes can bring about the substance to soften yet again? In fact, that&#8217s not a challenge: TPU tubes have a greater melting issue than butyl tubes. They are safe and sound with rim brakes.

There are numerous effectiveness claims about bike elements. How did you exam the efficiency?

We analyzed Rene Herse TPU tubes versus ultralight butyl tubes in thoroughly managed roll-down assessments, on a actual street with a rider on the bike. So these check success translate straight to the true environment. In the previous, we&#8217ve examined latex tubes from butyl tubes, and the efficiency gain was the identical for latex as for TPU tubes.

We&#8217ve also tested tubeless set up versus normal butyl tubes, and the velocity was equivalent with each setups. That&#8217s how we can say with self esteem that TPU tubes roll as rapidly as latex tubes, and faster than butyl tubes or tubeless.

Far more information:

  • 700C TPU tubes
  • 650B / 26&#8243 TPU tubes