currently running 255/55/20 on my 2011 4.4 looking to change to AT3s (had 275/40/20 on my 07 3.6) anyone know what the biggest size i can fit is ?

id like a taller side wall AT3s available in various sizes - 255/60/20, approx 2" taller same width, 275/60/20 approx 3" taller 0.8" wider

anyone fitted anything in these sizes? or know the limits?

Andy 1972 Series 3 full of character
1985 90 pick up went anywhere
1992 90 Exported
2007 L322 that was an experience
2010 D4 more versatile than a Swiss army knife, now gone
2011 L322 4.4 VSE

I got some rubbing on the arch liner at the front on my 255/55 R20 when a height sensor failed and it dropped to the bumpstops so I'd worry about going any larger as it may become undrivable in such an instance. I was just able to drive a short distance to a safe place at a slow speed. 2012 TDV8 Vogue (L322)