37s, 2.5 Ready Lift, Stock Wheels

Khellpap

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I know there has been a lot of talk about 37s, lifts, rubbing etc., so I thought I’d share my setup.

I purchased a 2021 7.3l tremor a few weeks ago. Went through dealer, who sub contracted the work out to a truck shop. Ended up buying the ready lift 2.5 leveling kit and Yokohama Geolander XATs 37x13.5x18 on my stock wheels. Went back and forth with both Ford and the truck shop, who said it would work. Two things worried me, the wheel width and rubbing. Went ahead and did it anyway, as I intended to buy new wheels soon anyways. I was ensured by both ford and the shop, I wouldnt have issues and everything is covered under warranty.

After 1,500 miles I have zero issues, other than some very minor rubbing only when turned all the way either direction. Other than that, the trucks runs great. I’m running 60 psi in the front and 55 psi in the rear. Forscan on the way so I can adjust the TPMS.

Anyone else have a similar set up or have any input on problems I may see later on? Thanks!
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Khellpap

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I’m very curious as well. I want to add 37x12.50 to my stock wheels but have heard very mixed feedback. Would love to hear more input.
I haven’t had any issues. IMO, it rides better than the stock tires. I’ll do a review after a couple thousand miles and after pulling my trailer.
 

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As you guys have probably seen, it's highly debatable whether you should put the stock wheels on a 12.5 width. Mine are pretty close, but still not 12.5's. A lot of shops wont mount these. How far have you aired down and checked for losing a bead? The of the benefits with the MT's is heavier sidewalls that help with this, i.e., less risk to lose a bead on a corner braking hard with lower PSI.
 

Robert357

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As you guys have probably seen, it's highly debatable whether you should put the stock wheels on a 12.5 width. Mine are pretty close, but still not 12.5's. A lot of shops wont mount these. How far have you aired down and checked for losing a bead? The of the benefits with the MT's is heavier sidewalls that help with this, i.e., less risk to lose a bead on a corner braking hard with lower PSI.
What size tires are you running?
 

Rich Pune

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For the risk averse, here is a list of popular tires that are approved for an 8" wide wheel.

Toyo Open Country M/T 315/70R18 (13" wide) approved rim width 8".

Toyo Open Country A/T III 37X12.50R18 approved rim width 8".

Nitto Trail Grappler M/T 37x12.50R18 approved rim width 8".

Nitto Ridge Grappler 37x12.50R18 approved rim width 8".

Mickey Thompson Baja Boss A/T 305/70R18 (12.5 wide) approved rim width 8".

Mickey Thompson Baja Boss M/T 305/70R18 (12.5 wide) approved rim width 8".

Yokohama Geolandar M/T 315/70R18 approved rim width 8"
 
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Khellpap

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Quick update. Got a very large screw in tire. Not repairable. Went to Discount, who said they wouldn’t put my size tire on rim. Called dealership and complained. Now getting new rims a little early.
 

Rich Pune

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Quick update. Got a very large screw in tire. Not repairable. Went to Discount, who said they wouldn’t put my size tire on rim. Called dealership and complained. Now getting new rims a little early.
Well that stinks. Tires were brand new.
 

Robert357

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For the risk averse, here is a list of popular tires that are approved for an 8" wide wheel.

Toyo Open Country M/T 315/70R18 (13" wide) approved rim width 8".

Toyo Open Country A/T III 37X12.50R18 approved rim width 8".

Nitto Trail Grappler M/T 37x12.50R18 approved rim width 8".

Nitto Ridge Grappler 37x12.50R18 approved rim width 8".

Mickey Thompson Baja Boss A/T 305/70R18 (12.5 wide) approved rim width 8".

Mickey Thompson Baja Boss M/T 305/70R18 (12.5 wide) approved rim width 8".

Yokohama Geolandar M/T 315/70R18 approved rim width 8"
Thank you very much for taking the time to put this together, it is greatly appreciated.
 

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For the risk averse, here is a list of popular tires that are approved for an 8" wide wheel.

Toyo Open Country M/T 315/70R18 (13" wide) approved rim width 8".

Toyo Open Country A/T III 37X12.50R18 approved rim width 8".

Nitto Trail Grappler M/T 37x12.50R18 approved rim width 8".

Nitto Ridge Grappler 37x12.50R18 approved rim width 8".

Mickey Thompson Baja Boss A/T 305/70R18 (12.5 wide) approved rim width 8".

Mickey Thompson Baja Boss M/T 305/70R18 (12.5 wide) approved rim width 8".

Yokohama Geolandar M/T 315/70R18 approved rim width 8"
Where are you finding that the 305/70r18 Mickey Thompson’s are approved for an 8” wheel???
Mickey Thompson’s Website shows 9.08-10”
 

Rich Pune

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Where are you finding that the 305/70r18 Mickey Thompson’s are approved for an 8” wheel???
Mickey Thompson’s Website shows 9.08-10”
The way MT displays it is wonky. The number on top is the size they used to measure. The bottom two numbers are the acceptable range. Like this:

9.0
8.0-10.0
 

Robert357

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For the risk averse, here is a list of popular tires that are approved for an 8" wide wheel.

Toyo Open Country M/T 315/70R18 (13" wide) approved rim width 8".

Toyo Open Country A/T III 37X12.50R18 approved rim width 8".

Nitto Trail Grappler M/T 37x12.50R18 approved rim width 8".

Nitto Ridge Grappler 37x12.50R18 approved rim width 8".

Mickey Thompson Baja Boss A/T 305/70R18 (12.5 wide) approved rim width 8".

Mickey Thompson Baja Boss M/T 305/70R18 (12.5 wide) approved rim width 8".

Yokohama Geolandar M/T 315/70R18 approved rim width 8"
In moving to a 12.5 inch tire and maintaining the factory wheel with a +40 offset, will we have problems with rubbing or clearance, if so, where would be the areas of concern? Thank you.
 
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