Originally Posted by timmer
Most lifts on tacos run in the 2.5 to 3" range Many coil overs and coil jobs come preset or measured out to give you a 2.5" lift. adjustable coil overs can give you up to 3.5" in some cases and coils such as the OME 885's can be shimmed up the extra 10mm to get you to 3". the difference between 2.5 and 3 although noticeable really amounts to no big deal performance wise. Personally mine is set at 2.75"
its really not the lift size that provides the "either or" line to running 285/75r16's but rather rub issues. Potential areas of offense are the flaps, pinchweld, fender flairs, plastic inner fender skirts, UCA's, Spindles, body mounts, ect. you can correct many of these issues by switching to a wheel with a lesser backspace. 4.5 is common 4.75 is likely better but MUCH more expensive. you also want to make sure you buy wheels that dont rub the brake calipers. Many more issues can be solved by judicious pounding, grinding and trimming of offending areas. the body mounts are the least affected but are the hardest to correct. Going to a lesser backspace in not without ramifications as well but these are minimal and many only exaserbate existing issues by a small amount.
as an aside there are not many trails where 32's vs 33's will make a difference that driving skills can not overcome
other issues have to do with being on the edge or your stock gearing ratios esp with manuals which essentially have a 3.73 geared diffs (IF I'm Not mistaked the Autos run a bit higher but Im not sure how much higher)
all this is a bunch to work through just to gain another 3/8 of minimum ground clearance over a tall 265/75r16 (ie 32") and another 3/4" of width.
the upside of doing these corrective measures (including regearing) is that if it is done in totality you can run up to a 34.5" tire with out MANY further issues provided you have a full 3" lift compatability. But be aware the upper tire size realm has a complete different set of issues which center mostly around the drivelines
IF you have your heart set on slapping some 33" meaties under your taco by all means do so and enjoy them. My intention is to give you an idea of what the issues that you will have to deal with are in exchange for another inch of tire .
Great post!!! Lots of good info!