Originally Posted by
nitropowered
If you are talking about Michelin tires, they measure more like 32 than the listed size of 30
I think this depends on the tire pressure and rim width . My Mich Mud2's measure right at 30mm (at the sidewalls,the knobs don't protrude) at around 35 PSI on an Alex AT-450 rim. I haven't checked them higher than that, but I have noticed with other tires the higher pressure makes them bulge more.