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Why not 18s

Markubis

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There is a whole bunch of 34-35" tires in the 18" rim size.

If I bought an OBX, I'd keep the stock rims, and ditch the street rubber for one of these.

Screenshot_20201027-124246_Firefox.jpg
Wouldn't the stock rims be too narrow for those?
Maybe the 285/75/18
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Incognito

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Wouldn't the stock rims be too narrow for those?
Maybe the 285/75/18
No.

The rims size guide is for optimal tread life.
Not " you"ll flip over and burn".

Every single JK Jeep you see on the road running 315/70R17 tires (35x12.50R17) on stock rims, is technically running an undersized rim for tire size.
 

John B+9

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Would also need to consider changing rear gears along with increasing tire diameter by three inches. Ford has optimized rear axle ratio and tire dimension to accomplish the model's "mission". OBX, which leans toward street use, has 70-series 32" and relatively tall 3.73:1 rear axle ratio. Going to 35" from 32" tires, a ~9.4% change, will have the same effect as further reducing your rear axle ratio to 3.5:1. Will drop engine RPM by that same 9.4% at any given speed - maybe below optimum torque/horsepower most of the time. By contrast, Sasquatch uses a 4.7:1 for 35-inchers.
 

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Would also need to consider changing rear gears along with increasing tire diameter by three inches. Ford has optimized rear axle ratio and tire dimension to accomplish the model's "mission". OBX, which leans toward street use, has 70-series 32" and relatively tall 3.73:1 rear axle ratio. Going to 35" from 32" tires, a ~9.4% change, will have the same effect as further reducing your rear axle ratio to 3.5:1. Will drop engine RPM by that same 9.4% at any given speed - maybe below optimum torque/horsepower most of the time. By contrast, Sasquatch uses a 4.7:1 for 35-inchers.
Which is why people should go with the optional 4.27 gears and locker on the OBX.
 

John B+9

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Which is why people should go with the optional 4.27 gears and locker on the OBX.
Good call. That's what I'm doing - auto on-demand 4x4 with 4.27:1 and locker.
 

Raptor911

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something to consider.

I can tell you without a doubt that the 35s on the Sasquatch will be close to 100 pounds each and if you rotate them yourself like I do ... trying to carefully mount them without scratching the barrel is much easier on 18s when compared to 17s. With 17s you are very close to the rotors/brake dust shield. And if you let a shop do it, they will def scratch the hell out of your wheels.

I hope this makes sense.
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