Just changed tires and I can't get the beads to set properly. Are there any tricks? I rolled them at low pressure, tubes are in straight without kinks? Aired them up real high and rode them? Thanks for the help

You say you put high pressure in them and they're still not seated? Do they seem unseated near the tube? If so let most (not all, you want the tube to keep its shape) of the air out, unscrew the nut on the valve stem (the one that screws down to the rim) push the valve stem up pushing the tube into the tire (carefully look at the bead to make sure the tube isn't caught underneath) then inflate the tire to it's proper pressure.

Of course I'm assuming a 700 sized tire with a presta valve. If you have an MTB tire, you have a Schraeder valve. Deflate the tire, push the valve stem up to push the tube up into the tire, making sure the tube isn't caught under the tire bead, then re-inflate the tire.

Let know if that works or not.

I hate to sound stupid, but what size is the tire and the rim? Maybe it just doesn't fit or the tube's too large?

what are you talking about?

my mountain bike has presta valves, as do most of the mountain bikes at my shop.

This is quite the easy answer.

The key of having the bead seat properly is to deflate the tire, then push the stem into the rim some to allow the bead to set in properly, then bring tube back down tow where it was and reinflate the tire. It works every time, and it will cut down pinch flats.

I like to inflate a little, just enough to get pressure, then deflate. I then push the bead from side-to-side as I go all thw way aroudn the wheel.

I then repeat going to a little more pressure. Second time around, when I push the tire over, I look to make sure the innertube isn't visible.

I also give the valve a push into the tire.

Great, thanks for the help. What I was talking about was "flat" spots where the bead didn't come "up/out" the meet the rim. I deflated, as above, and sqeazed the tire and rocked it back and forth. Aired up and everything is back to normal. Thanks for the time and help!

Deflate the tire, put soapy water around the bead on each side and inflate the tire until you see it take the bead. This will sometimes take quite a bit of over inflation, but it usually works. One thing I wouldn't do is ride it with the flat spots for too long. Tires develope memories and if you don't address this while the tire is still new, it may never seat properly.