Foo - Presta in Schrader type rim

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Silverexpress
11-10-05, 07:39 PM
Hello,

Got a flat today. Didn't lose total air till I parked the bike in the garage. Lucky me! Anyhow, my rims on my commuter take schrader valved tubes, but since I did not have a replacement on hand, I replaced it with a presta valved tube. So I have a presta protruding out of a hole made for a schrader. Is this OK? Will I get a flat on my next commute because of this?

USAZorro
11-10-05, 07:42 PM
The situation is not ideal. While no guarantee you will flat, you're at higher risk.
eubi
11-10-05, 08:56 PM
At least try to put a duct tape boot around the presta stem. It will keep the tube from herniating through the schrader valve hole in the rim.

Erick L
11-10-05, 09:31 PM
I've been using presta tubes in a schrader-drilled rim for ~4000km. No problem.
Louis
11-10-05, 11:51 PM
If your using high pressure 100lbs ++ you are running a greater risk than, say, a mountain bike at 50lbs. If it were me, I'd yank it back out and fit a washer or a grommet just to be safe. Your LBS should carry a proper adapter for this.

Without re-starting the presta vs. schrader discussion, I think you are better off with presta.
af895
11-11-05, 01:29 AM
Ditto Erick L - about 800km so far, no incidents, 100psi.

Those inserts Louis speaks of are a good idea. Next time I'm at the LBS, I'm going to pick a couple up. They basically shim the Shrader hole down to Presta size. If nothing else, it means less slop which I take as a good thing. (less stress at the valve/tube seam)