What were some of the OEM sizes available for trucks with 3.55 gears?

I've got a 2011 XLT 4x2 with 3.55's, currently running a 29'' tall tire, curious if a 31'' will make a noticeable difference in power.

 

Slight decrease but not much. That is the change I made.

 

You'll barely notice it, I went from 29" to 35" with 3.55 gears and it's not even that bad.

 

Well I'm stupid...

I went and looked at my tires, they are actually 235/75/17...

On online tire calculators that's a 30.9'' tire, does that sound right?

 

My stock Pirelli's are 275x55x20 which is close to a 32" tire. Put on some 305x55x20 Nitto's 33" and the 3.55's handle them OK.

 

You had 32's stock with 3.55? Just confirming

 

Yes I did. I then went up to 33's. These are the 33's on stock 20's.

 

I had 3.55 gears on my '95 and ran a 35x12.50 with them and it still had plenty of power. My '06 has 30inch tall from the factory but you'll hardly notice a difference if anything at all going to a 31 or a 33..if anything your mpg will go down a bit, but not much

 

2007 FX4 with 3.55 gears and 275/55-20 factory fitted Perelli Scorpion ATR tires, 31.9" OD.

http://www.1010tires.com/TireSizeCal...bmit&reset=yes