It’s been raining for 4 days now, just when I got into riding my Nimbus Nightrider Pro 36” uni. Today I thought “F. The rain, I’m going anyways” unfortunately there is a tiny hole in the tube so I lose a bit of air, but so little that I can make a good distance with it every ride. Today as I pumped up the tire, the whole valve came off when removing the pump, so I need a new tube.
When looking on municycle.com there is only 1 Foss innertube for the 36”. My question therefore is if 36” uni’s have a universal innertube, so the same for each type?
Which valve do you use? You can screw the French valve back in. I use a lightweight Quax tube, or at least I ordered it from Quax, as well as the rim and tire. The rest are different parts. I use a Schrader valve and have never had any problems with the air or valves.
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There exists a few types of 36er tubes: the old Qu-ax tubes which weigh a lot (≈500g), the “light” Qu-ax tubes which weigh still a lot (≈300g), the Foss tubes which weigh less but are more prompt to lose air (be prepared to inflate it every week), @www.einradshop.ch’s TPU tubes (125g) and finally the 36polici TPU tubes which weigh very little (108g) and do not lose air as much as others. The only disadvantage of the 36polici is that there core sometimes come with the pump. You have to glue them with some sort of thread lock. Note this issue can happen with other sorts of Presta valves, too.
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And you can use the good old trick of using a 29" Michelin Butyl as they are lighter and they cope well with stretching to 36" - more than the other brands/models which don’t like this too much.
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um, so there are also my 36" TPU tubes with Schrader (car) valve
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Oh, I didn’t know that you had 36er TPU tubes! Sorry for the omission. Let me fix my message!
That’s good news for people who have alu rims with a hole for Schrader valves.
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Schwalbe SV19 (butyl) is also a nice high quality tube that works great when stretched to 36".
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I have a Foss valve. I tried putting it back in but as soon as the tire was pumped up it came off again. I wont take a 29” tube.
@www.einradshop.ch :
what is so special about a schrader valve? The current valve is also a car like Valve l ike with a pin in the middle that goes down when you pump it up
I just took the 32 for a spin which has the exact same valve. A picture is better than my silly description.
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Schrader and car valve are the same thing. There are different names for them. This is the valve you’ve pictured.
So mine is a Foss Schrader valve. What does TPU stand for?
Here you go:
TPU tubes are another kind of tubes. They aren’t made of butyl or latex. Theoretically, they are lighter and more puncture-proof than butyl tubes. However, as manufacturers try to go as light as possible, their puncture-proofness sometimes doesn’t work great.
I find the most problematic areas with TPU tubes are 1. the welded seam, and 2. the welded valve. In the second case, I received a series of 200 pcs. 20x 4.0 and 24x 4.0 tubes, all of which developed a leak at the tube/valve junction after the first inflation. Conversely, I was able to inflate a 24x 3.0 tube in a 24x 4.0 tire for half a year until it developed a leak.
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After having a hole in my first 36" TPU tube directly after mounting it, I mounted a Michelin Airstop Butyl 29" (227g) on my 36". It is there for 7 years now without any problems and without puncture at light “weekday daily use”. In case it has a puncture, I want to replace it with the 29" Schwalbe SV19A (143g), like the heavier SV19 was proposed by @Hammer.
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My 36" tube actually did get a puncture once for many years, but I just fixed it and it had been holding for those many years. Now it is just the valve that failed. Isn’t it hard to put a 29 on a wheel that is much bigger? I reckon the tire needs to stretch to fit on. One might think it will degrade the material faster than when putting a tube on in the right size. Even if you got it for 7 years now. Just trying to understand 
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I just pumped it up a bit before installation, so it had almost 36" and almost popped in without problems. I never tried 29" tubes before and had no problems installing it.
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You can also simply exchange your valve.
ok next question: WHERE (not why) did you buy these and what was the price?
I need a new tube period. Owning a 36" I can’t ride is no good.
I think the valve itself is good, but the part on the tube it connects to was worn out or something.
I proposed a SV19 not to be confused with the SV19A which is a lightweight tube. It might work but it’s not what I did. As it’s more lightweight it will have thinner walls so it might not stretch nicely and/or it may leak air faster.
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The original 36" tube was perfect too in terms of not having any problem or puncture. But it was really heavy. The expensive TPU tube broke immediately. I didn’t even try the specially ordered patches. So the only reasonable way for me was to try a 29" tube. Especially to get the knowledge to be able to buy a replacement tube everywhere, even in a supermarket.
Oops, I corrected my post 
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