Bike Forums - Inner tube

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nickg01

09-03-17 04:07 PM

Inner tube

I have a 28 x 2.125 or 700 x 45c tire. Will I be okay to run a 27.5 by 2.125 inner tube until I can get the proper inner tube?

Bill Kapaun

09-03-17 04:24 PM

The ID is about 1-1/2" less.
I wouldn't.

http://sheldonbrown.com/harris/tires/index.html

Berg417448

09-03-17 06:20 PM

Quote:

Originally Posted by nickg01 (Post 19838097)

I have a 28 x 2.125 or 700 x 45c tire. Will I be okay to run a 27.5 by 2.125 inner tube until I can get the proper inner tube?

It will probably be fine. I've run 26" tubes in 29" tires in the past with no issues other than being a little more difficult to install.

Hoopdriver

09-04-17 07:37 AM

You might have a slight issue with pinching when mounting as the tube will hug the rim tighter. Once installed, it should be ok if you are in a hurry to get going. Instead of going to the trouble to mount and then change later, why not just get the proper sized tubes now?

fietsbob

09-04-17 10:26 AM

You have my permission to try it. Is that what you needed?

chong67

09-05-17 08:59 AM

I need help.

Outside of my bike says 700x30mm tire.

My inner tube got a hole and I want to replace it. It says 700x28/38C

Yes, I measure the stem and it is 42mm.

Can I get this: 700c x 18-25c 42mm Stem Presta Valve

Hoopdriver

09-05-17 11:02 AM

Quote:

Originally Posted by chong67 (Post 19841627)

I'd recommend a bit wider tube. Something like a 28/32 or 28/35. I don't think I have ever seen a 28/38

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