All I can think of at this point is you might have a slow leak somewhere. Put a little spit on the valve stem and see if it bubbles. If it does your valve stem core is loose.

Take you wheel off the bike. Fill up a big tub with water and rotate your wheel slowly while holding part of it underwater. Look for air bubbles. Rotate it all the way around so that your check the whole tire and rim. If you have a leak, you should see air bubbles. It helps to over inflate the tube some so that you have plenty of air pressure to work with.

The proper way to do this is just dunk the tube, not the whole tire and rim. If I was you, I'd pull the tube out, pump it up, then dunk it.

Or you could alway take it back to the dealer and wait three or four days for him to get around to it...

Willum
TC
Wichita Falls, TX

 

Damn! Now that's a thorn! Collect a few of those and use them for chop sticks or shishkabob skewers.

 

Have you made sure the valve core is in nice and snug? You may even want to replace that since they they're probably less than a dollar. Also, you might want to wiggle the valve stem around while listening for a leak. Further, inspect the tire to see if you've taken on any sharp objects. Sometimes just the force of rolling down the road will cause air to leak past screws, nails, pieces of glass or whatever even though it won't leak much at all setting still.

This isn't rocket science or some deep mystery. If you can't resolve the problem with a new valve core, you have to pull the tube and either patch or replace. Just make sure you've inspected for and removed any sharp objects.

 

so you dont need rim lock on the front?

 

Maybe someone that's ridden in more dirt than me can answer that. I would think rim locks would be more critical on the rear tire since thats where the power delivery is at, but dunno for sure.

 

Don't forget about braking though - hard braking up front can decelerate you just as much as the rear wheel will accelerate the bike so the forces on the wheel would be similar. So I think you need both.

 

Nobrakes you are right, Both of my flats were in the front tire when I was running with very low air pressure. I ripped the valve stem both times. I tend to brake very hard with the front brake and that is why I keep ripping the valve stem. I am going to install a rim lock and that should fix the problem...

 

You're making too much sense, man! Ummm... like he said. [&:] I spend all my time on the pavement with tire's pumped-up.

 

Just a word of advice after getting 2 flats in 2 rides (back tyre) I loosened off my valve lock nut and let it sit up under the valve cap. I found that with both my flats (1 with and 1 without rim lock) the tube had spun a little in the tyre and ripped out the valve stem. Since I leave them loose I haven't had another flat

cheers

 

That seems to be consistent with what that guy was saying in the video as sell. He said to leave them a little bit loose to allow the tube to shift around.