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Sorry I missed that. The center bore for a hub centric wheel should be 3.5", and I went out and measured the hub centric wheels on my truck to verify. 4.25" is what a 3/4 ton (8 lug) would use.
but a lot of after market wheels do have the larger bore, which means you need to use hub centric rings to prevent vibrations.
I found some old GM 15x8 aluminum rims that have that same backspace. except for the age I think they look good, sort of like Mickey Thompson classic III's but not quite as nice. I don't know what the offset is but the back space is 3.625/ centre bore is 4.25 which is quite a. gap but I found spacers on line. should I be okay to run the 35/12.5/15? thanks
If you know the backspacing and the wheel width you know the offset. An 8" wheel with 4" backspacing has zero offset. So a 3.625" backspacing is a -0.375 offset. A 10"wheel with the same backspacing has a -1.375" offset.
Can't comment on whether you need the hub-centric wheels.
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS/PDB, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination A/Ts, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
Dual Everything: '15 Chryco Jeep Cherokee KL Trailhawk, ECO Green
Blockchain the vote.
How close are they? Unless the wheels are bent, or something bad happens, if you have clearance, they should always clear. I have been driving my truck for almost 13 years with 12.50 wide tires on the same wheels.
Wheel spacers will push the tires out 1.5 inches, and the rear axle is already wider than the front. I am personally very against wheel spacers, seen way to many of them fail.
If they are indeed too close, you will need to find some 15x10's, which will pull the tires out more. That, or move the springs under the frame.
Depends on the design of the tires. If the cross-section width is the same, the bulge will be the same. However, in general, a taller tire will have a larger cross-section even if the tread width is the same.
The tire manufacturer has specs. Look them up.
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS/PDB, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination A/Ts, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
Dual Everything: '15 Chryco Jeep Cherokee KL Trailhawk, ECO Green
Blockchain the vote.