Tubeless tires on tube rims?

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(09-04-2013 12:44 AM)Lapchik Wrote:  I know I have a second hole in my rims that currently has a rubber plug in it. I am guessing that is for a rim lock, but why/where/how would I use rim locks?

Rim locks are used on most off road bikes because the tire pressure is low enough to allow the tire to spin on the rim, causing the air valve to be sheared off of the tube.

Typical off road pressures are 10-14psi, and it's just not enough pressure inside the tire to keep enough friction on the rim.. Crank on the throttle, or hit the brakes hard, and the tire can slip on the rim.. The tire will try to take the tube with it, and the valve can't spin.. Then you're sitting in the middle of nowhere, with a tube that can't be repaired.

If you're running higher tire pressure, the chance of the tire slipping is minimal.. 20psi or more, the rim lock isn't needed, and worse, if you're dual sporting and are riding at highway speed, that rim lock is a lot of weight to screw up balance.