I have finally located a place that does "tire truing" and made an appointment for tomorrow. Supposedly, they are able to put the truck up in the air (while the tires are still warm so they don't flatspot while they're working) and then do the actual cutting process with the wheel/tire still mounted to the hub. Once the tire is ROUND, they do a high-speed balance (also on the truck) so that everything should be perfect. I know I have at least one REALLY bad tire (non-Round) and maybe more....it will be interesting to see how much tread they'll need to cut off to get them fixed. Anyway. It's about a 30 minute drive to the shop, and probably 45 minutes from the shop to my work....so I'll have plenty of time to evaluate the BEFORE and AFTER effects. I'll keep you posted. UPDATE: ___________________________________________________________ IT'S REAAAALLLLLLLY NICE !!!! I just drove a stretch of highway one-handed at 75MPH! I've never driven those kinds of speeds before, and certainly NOT with only one hand on the wheel. I'd say the difference is night-and-day. That's not an exaggeration...... Overall I was pleasantly surprised at how little rubber was removed to achieve "trueness". I've got all the shavings in a shoebox-sized box, and the pile is only about 3" thick. Not bad. The runout on the worst tires was about 1/4"....(the high spots) the other two were maybe 1/8"....but those apparently small variations are magnified a LOT at highway speeds. I took pics....the shop is really clean and the owner is great. He spent a lot of time doing all the truing and balancing on the vehicle (which takes longer but turns out better) PICS: Here's is what a $6200 truing machine looks like.... They just got this one in their shop....it still had that "new car smell" Here's what it does when you let it work..... A little scary at first: (the cuttings are paper thin! Weird.) An interesting action shot.... ....and the end result: The last picture is somewhat deceiving....it's not as butchered as the picture makes it appear. The process does not produce a "super smooth" finish like when you turn metal in a lathe....the rubber is trying to squirm and shift as the blade cuts it. The final finish is a slightly textured-looking tread, but that texture will probably disappear in less than 100 miles of regular street driving.