I'm still looking at options to replace my 31" BFG MT's, and am interested in the Super Swamper M16's. After comparing the specs, I'm confused....



My 31x10.50R15 BFG's show an actual diameter of 30.8", and 675 revs/mile.
The 31x10.50R16 M16's show an actual diameter of 31.3", and 722 revs/mile.

Shouldn't a larger diameter make LESS revs/mile?

The M16 33" show 668 revs/mile, and is very close to the 675 of the 31" BFG?

Why don't the numbers add up? Do Interco tires run small?

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2004 Black Renegade, manual transmission, Frankenlifted, JBA 4.5 A-arms, 31" Super Swamper M16's on Pro Comp 8128 wheels, MagnaFlow exhaust, Volant cold air intake, and clear front signals.

Interco is one of the few tire companies whose diameter comes close ( and even exceeds) the advertised diameter in most cases. It doesn't help your revs question, though.

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LOST # 633
'05 KJ 3.7L/6spd/241 245/75/16 MT's
'88 MJ 4.0L/AW4/231 SWB HPD30 & trac-loc D44 w/3.73's
A dirty Jeep is a happy Jeep

Nobody knows why the revs/mile don't match up?

If Interco tires run close to (or more than) the advertised size, than I guess I should trust the 31.3" measurement for the 31" tire. Maybe manufacturers calculate revs/mile differently?

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2004 Black Renegade, manual transmission, Frankenlifted, JBA 4.5 A-arms, 31" Super Swamper M16's on Pro Comp 8128 wheels, MagnaFlow exhaust, Volant cold air intake, and clear front signals.