smallet

I recently ordered Tubolito Road 18-28 tubes as spares for my tubeless Continental 5000s 30-622 tires. But I did not realize that the tube specification says 18-28 and my new tires are 30mm. Do you think it will stretch to 30mm OK? Did anyone have such experience? The link is below:

https://www.amazon.de/gp/product/B07C7MN62G

PeteHski

I was wondering about this too. I expect they will be fine for emergency use at the relatively low pressure involved. But would be useful if someone has tried them.

chaadster

Oh yeah, it’ll stretch to fill for sure. Check out YouTube for vids of guys blowing up Tubolitos huge.

The questions, then, are 1) will oversizing the Tubolito impact its performance characteristics, and if so, do those changes have a negative impact on what I want it to do?

Personally, I’d go with it without worry. First, it’s pretty unlikely you’ll even need it, and if you do it’ll probably be to give to another needy rider.Also, though, I think that with the kind of tire volume variation we see just based on rim inner width, that a couple of millimeters isn”t a big deal. Maybe— worst case— tube wall thickness goes down when oversizing and maybe some durability and puncture resilience is lost in so doing, but if it’s just a temp solution to get you through a day or two, I don’t think that’s a significant problem.

Germany_chris

I run them in my 38mm tires

chaadster

Why do you do that?

Germany_chris

I don’t like valve extenders, Tubolitos are light and available with 80mm valves

smallet

I use the Tubolito 18-28mm for my older 24mm GP5000 TL (NOT sTR). The tire has a small cut that was not fixed by sealant. I decided not to mess with the plugs because from past experience they are not reliable on road tires. So I used Tubolito. It works great and keeps air well. If I decided to use tubes again, I would most definitely use Tubolito. They are lighter and feel almost like tubeless, definitely better than butyl tubes.

Interesting... I tried, but was not able to find a video like this. There are some Tubolito reviews, but I did not find a stretch resistance test.

smallet

Do you mean you use road tubes on 38 mm tires? There are Tubolito for gravel, which fit 38 mm.

chaadster

This is the one I was thinking of, as it clearly shows Tubolito is extremely stretchy, suggesting getting a couple of millimeters more girth out of them should not be a problem:
https://youtu.be/bt4eQDdvcis

youtu.be/bt4eQDdvcis

chaadster

Yes, but not with 80mm valves which they want, only the narrower, road spec Tubolito tubes have the 80mm stems.

PeteHski

The more I think about it, the more I think it will be fine. The tube can clearly stretch out and the pressure will be lower. I only intend to get one as an ultra-compact emergency spare. I've had zero use for a tube in the last 3 years of running tubeless road tyres. I don't even carry a spare tube at the moment, but would be nice to have one of these as a back-up. I find normal tubes a bit too bulky to carry in a jersey and I prefer not to run even a small saddle bag.

smallet

Believe it or not I carry all tools including all keys, chain breaker, chain pliers, tyre levers, and a tube with a patch kit in my back pocket. With a Tubolito tube total weight is 235 gram.

PeteHski

I carry a multi-tool in my pocket, along with a Dynaplug kit and I used to carry a standard tube, patch kit and levers in a small saddle pack. But I eventually got rid of the saddle pack as it was a dirt magnet and I never used it.

A much smaller Tubolito in a pocket seems like a better solution to the saddle pack.

Germany_chris

I use the same tubes whether gravel or road tires