A lot depends on the articulation you run into.
A 32 can stuff w/o a lift if you remove the well plastic.
A 33 sticks out another 1/2", and hits metal on full compression on an oem set-up.
If you are doing mud, or other terrain where you don't get full compression, or your suspension is too stiff to fully compress, you installed bumpstop extensions, etc...that last 1/2" can be kept at bay...but you lost uptravel, etc.
If you do rocks in terrain that you need all the travel, don't have bumpstop extensions or too stiff a suspension to compress fully, etc...then that last 1/2" of uptravel will hit just like w/o an SL.
Of course, every X is a bit different, so that 1/2" might be smaller or larger.
And - some 33's are 32.5", and some are 33", etc...so that also affects that last 1/2".
And - of course, the BS makes a big difference, when the wheel is turned, as the arc it swings through is different, and, on compression, as the tire is now sticking out under the fender more as well if there is less BS.
The section width makes a difference as well, some 33's are 285/75/16's for example, really 33x11.5's, etc...and nominal 33x12.5/15's are tpically less than 33" in diameter...shorter but fatter than the 285's....so they clear differently as well.
So that means you can run 33's w/o a BL under some circumstances, and you can have 31's rub like a bitch with a 3" SL, etc...and everything in between....depending upon the set-ups.
As a rule of thumb - figure the 2" BL to get 33's and full articulation...but there are other ways.
It all depends on the specifics.
_________________________
- TJ
2001 Xterra '03 VG33, SE 5 spd, 305/70/16's, Revolvers, UBSkidderz, Doubled AAL's, 3"SL/2"BL, winch/bumpers, skids, sliders, OBA, Snorkel, pine stripes....
Friends don't let friends drive stock.
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