G.I.G. said:
I voted for Spidertrax. I just put a set on a week ago and there has been no difference in the way my 4R drives and it looks WAY better with them on!
Technically, no wheel spacers are "best" because the more you mod your truck (different tires, suspensions, wheel spacers, etc.) the further away it is from the way it was engineered at Toyota. As far as long term reliability goes, no spacers are best. Wheel spacers can add additional stress to wheel bearings which means that the bearings might wear out slightly prematurely, but IMO, that is a small price to pay. Also, running wheel spacers is no worse on your wheel bearings then running wider or larger offset wheels. One other potential negative to running spacers is that some tire shops won't touch your car if it has wheel spacers because they are worried about liability. Just call around and you'll find a place that will still balance and rotate your tires for you.
I did a TON of research on wheel spacers on the net, called 4-wheel drive shops, and even called Spidertrax themselves to talk to them about spacers. I determined Spidertrax to be the best and I think most would agree on here as well.
I would jump on the Spidertrax FAST if you haven't ordered already. No one had them a month ago and I had Slee Off Road set some aside for me when they got them in. Apparently Spidertrax will do a big run of them, ship them all, then almost immediately go on back order again, meaning that you would need to wait another couple of months to get them. If Burtman is out of them, try Slee Off Road in Golden, CO.