The bar is on my 95 SR. I don't have a micrometer to measure it with, so I was using a machinists ruler, looking down from the top of the radiator. To be absolutely certain, I'll need to pull the skid plate & get closer, but I was pretty confident that it was 28 & not 29mm. I'm not sure if I'll have time to do that today, but I'll give it a shot.

95 Montero SR
3.8 MIVEC, Advance headers, 2 1/2" exhaust, Magnaflow muffler, OME shocks & rear springs, 2" body lift, 3" tank lift, 4.90s, TRE front locker, factory rear locker, Roger Brown Rock Sliderz, 315/75r16 (35") tires, Sport big brakes