2004 2500 Diesel 4.10’s Swap to Tall 255/85R17?

[3rdgen]

I’m sorry if this is an old topic on here. I’ve got a sweet 2004 (305/555) 4wd stock suspension with 4.10’s. Swapping from stock 265/70R17 to 255/85R17 would get me pretty close to 3.73 highway cruising rpm. My question: will I have any clearance problems with this taller, narrower tire? Thank you!

 

[AH64ID]

I ran that size tire for many miles on my 2005 and it fit just fine, even with tire chains installed.

 

[Darkbloodmon]

Here is a link to a nifty tire size calculator. It's close to a 35" but not as wide, you should clear no issue.

 

[Ozymandias]

Only problem from my point is to get the torque to the ground with these wieners.

285/75-17 is the better choice and also easier available in case as the exotic size 255/75-17.

 

[Regcabguy]

You'll sink like a rock in soft dirt or sand.

 

[slowmover]

Taller tires won’t actually improve MPG.

1,725-rpm or 60-MPH is max potential.
Higher rpm’s and speed (aero drag) kill it.

A pickup is a 55-65/mph vehicle.

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