No Lift tire size guide (work in progress)
Drifting
Joined: Apr 2021
Posts: 30
Likes: 37
This is probably a stupid question, but is there any downside to running offset spacers? I'm planning on replacing the OEM tires with Nitto Ridge Grapplers (275/55/20). With 30mm spacers, the front wheels poke out just a little too much for my tastes, but the rears are perfect. My ideal setup would be 25mm spacers in the front and 30mm spacers in the rear.
Mudding
Joined: Jan 2021
Posts: 228
Likes: 101
From: Vancouver, BC
This is strange, definitely seen this size in KO2's reported as fitting, they are what I was planning on putting on the stock rims. What could be so different about the alstons that causes them to rub with the same tire? Or are the tolerances that bad on the defender?
Three Wheeling
Joined: Feb 2021
Posts: 65
Likes: 30
Has to be the wheels, different offset than OEM, most likely.
Stock tires (assuming the offroad option) are Goodyear Wrangler All-Terrain Adeventures in 255/60r20. That makes for a tire with an overall diameter of 32” and a section width of 10.9”. By comparison, A KO2 in 275/55r20 makes for an overall diameter of 31.8” and a section width of 11.1” So roughly the same sized tires… you’re losing .2” of diameter and gaining .2” of width.
It’s true that very often section width is a far more limiting factor than overall diameter when trying to go larger without issue. But .2” is a tiny difference. So small that you might expect to see that variance just in different particular tires of the same make/model/size, if you went with one of the cheaper manufacturers with less stringent tolerances. Or even assuming all 5 tires are perfect to the millimeter, a width difference of .2” could easily be achieved just by airing down a bit. Or literally fluctuations in outside temperature.
The point is, the differences between the stock tire size and yours are so close as to be reasonably expected to fit, given that a truckmaker will make allowances for small tire size differences of fractions of an inch due changes in the weather, the need to air down, etc… Assuming the OEM wheels are being used.
I don’t know anything about the wheels you’ve selected, but I’d bet $10 the offset is markedly different from OEM wheels. A full inch of rub, front and back… It’s the only thing that makes sense.
Stock tires (assuming the offroad option) are Goodyear Wrangler All-Terrain Adeventures in 255/60r20. That makes for a tire with an overall diameter of 32” and a section width of 10.9”. By comparison, A KO2 in 275/55r20 makes for an overall diameter of 31.8” and a section width of 11.1” So roughly the same sized tires… you’re losing .2” of diameter and gaining .2” of width.
It’s true that very often section width is a far more limiting factor than overall diameter when trying to go larger without issue. But .2” is a tiny difference. So small that you might expect to see that variance just in different particular tires of the same make/model/size, if you went with one of the cheaper manufacturers with less stringent tolerances. Or even assuming all 5 tires are perfect to the millimeter, a width difference of .2” could easily be achieved just by airing down a bit. Or literally fluctuations in outside temperature.
The point is, the differences between the stock tire size and yours are so close as to be reasonably expected to fit, given that a truckmaker will make allowances for small tire size differences of fractions of an inch due changes in the weather, the need to air down, etc… Assuming the OEM wheels are being used.
I don’t know anything about the wheels you’ve selected, but I’d bet $10 the offset is markedly different from OEM wheels. A full inch of rub, front and back… It’s the only thing that makes sense.
Last edited by TheLittleEngineThatCould; May 17, 2021 at 04:03 PM.
Drifting
Joined: Mar 2021
Posts: 29
Likes: 6
His wheels might be 1 to 1.5" wider so that will make a 275/55/20 a bit bigger than a stock narrower rim.
Three Wheeling
Joined: Mar 2021
Posts: 77
Likes: 110
From: Kuwait
Has to be the wheels, different offset than OEM, most likely.
Stock tires (assuming the offroad option) are Goodyear Wrangler All-Terrain Adeventures in 255/60r20. That makes for a tire with an overall diameter of 32” and a section width of 10.9”. By comparison, A KO2 in 275/55r20 makes for an overall diameter of 31.8” and a section width of 11.1” So roughly the same sized tires… you’re losing .2” of diameter and gaining .2” of width.
It’s true that very often section width is a far more mitigating factor than overall diameter when trying to go larger without issue. But .2” is a tiny difference. So small that you might expect to see that variance just in different particular tires of the same make/model/size, if you went with one of the cheaper manufacturers with less stringent tolerances. Or even assuming all 5 tires are perfect to the millimeter, a width difference of .2” could easily be achieved just by airing down a bit. Or temperature changes.
The point is, the differences between the stock tire size and yours are so close as to be reasonably expected to fit, given that a truckmaker will make allowances for small tire size differences of fractions of inch due changes in the weather, the need to air down, etc… Assuming the OEM wheels are being used.
I don’t know anything about those wheels, but I’d bet $10 the offset is markedly different from OEM wheels. It’s the only thing that makes sense…
Stock tires (assuming the offroad option) are Goodyear Wrangler All-Terrain Adeventures in 255/60r20. That makes for a tire with an overall diameter of 32” and a section width of 10.9”. By comparison, A KO2 in 275/55r20 makes for an overall diameter of 31.8” and a section width of 11.1” So roughly the same sized tires… you’re losing .2” of diameter and gaining .2” of width.
It’s true that very often section width is a far more mitigating factor than overall diameter when trying to go larger without issue. But .2” is a tiny difference. So small that you might expect to see that variance just in different particular tires of the same make/model/size, if you went with one of the cheaper manufacturers with less stringent tolerances. Or even assuming all 5 tires are perfect to the millimeter, a width difference of .2” could easily be achieved just by airing down a bit. Or temperature changes.
The point is, the differences between the stock tire size and yours are so close as to be reasonably expected to fit, given that a truckmaker will make allowances for small tire size differences of fractions of inch due changes in the weather, the need to air down, etc… Assuming the OEM wheels are being used.
I don’t know anything about those wheels, but I’d bet $10 the offset is markedly different from OEM wheels. It’s the only thing that makes sense…
My wheels specs are:
20x8.5
Offset 25
Back spacing 5.730
and when the tire was installed, as you can see in the pictures (with the BFG above) they were sticking out more than the stock wheels.
the below pictures are with the Goodyears 255/60/20.
Last edited by aao4473; May 17, 2021 at 04:15 PM.
