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Message started by TBeck2000 on 06/21/06 at 08:00:08

Title: Inner tube question
Post by TBeck2000 on 06/21/06 at 08:00:08

I snagged my rear tube when I was mounting a new Metzeler ME880. :-/ I want to go with a new tube rather than trying to patch it up.

I was looking for recommendations on a replacement tube. I am reading that a 140/80 tire needs a 5.50/6.00 tube. I am having a tough time finding this size at a cheap price.

I have been able to find 5.00/5.50 tubes for cheap and I was wondering if they would work in my application. The Metzeler's sidewalls are much thicker than the IRC tire, so I would think that there is less space inside the tire for the tube. Would this smaller size tube work?

If I have to stick with the 5.50/6.00 tube, anybody have any links on where to pick one up cheaply?

Title: Re: Inner tube question
Post by olscout99 on 06/21/06 at 08:11:25

Hopefully somebody with more experience can post an answer, but I had the same problem last week when I was ordering new tires and tubes for my Savage. I went by a recommendation I had seen that said that if the 'recommended' size was not available, to use the next smaller size and not larger, that the tube had to expand into the tire and the larger size would not be able to expand and work like it should. I ended up buying the 5.00-5.50 size tube for my new Dunlop K555 in 140/80-15. If you were putting a new tire on with the old tube, it's probably better that you snagged it anyway- from what I read, new tire means you need a new tube. Made sense to me anyway, why spend big bucks for a tire and cheap out on the part that holds the air?

Title: Re: Inner tube question
Post by slavy on 06/21/06 at 09:00:00

I don't know what is the recomended tube size, but it is better to put a smaller tube, than bigger. The reason is that if it is smaller, it will expand, but it will stil hold air and there is no problem. If it is just a little bigger- not a problem, but if it is significantly bigger, the tube will kink inside and You will end up with 2 parts of the tube rubbing. Eventually the tube will split on the line of the kink. And You can trust me on this - the tire goes down VERY fast.

Title: Re: Inner tube question
Post by Reelthing on 06/21/06 at 10:13:27

on my last tire change they used one on the back with the valve stem bent at a right angle - sure makes tire air checks and fills a lot easier

Title: Re: Inner tube question
Post by marty62253 on 06/21/06 at 14:19:43

O.K. you found the old tire guy....It is perfectly fine to use a 5.00/5.50-15 tube in a 140/80-15 tire.
DO NOT USE a 5.00/5.10-15 tube - that would be a bit of a stretch (please don't shoot me).