Tire Fitment, With Pictures. Post your 10.5 wheel/tire combos

89GTRound2

New Member
Mar 17, 2021
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New to the Forum, Not new to foxbody things. Looking for Tire size help. I am building my second 1989 Convertible fox and running a 10.5 Cobra rep from LMR. Current Tires mounted are 315/35/17 Nitto 555R2s. I was unnaware that the R2 have a MUCH wider (dare i say accurate?) tread width. I am used to the 555Rs that ran narrow. My last car that was a twin to this one, wore 17x9 cobra R wheels with 275/40 Nitto 555R rears with no modification to fender well or rolling of the fenders. I know they ran narrow so this seems to be why i thought i could get away with the 315/35 in the R2.... boy was i a little wrong. I have beat the ever living S*** out of the inner fender, fully rolled the lip and I am sticking out just a hair past the outer lip... I want them to tuck in just ever so slightly.... My rear suspension is BMR Lcas, BMR lowering springs, no isolators, stock length 5 lug conversion axles from LMR, and i have the options to run spacers if i need to, but the pics i will provide will show the fitment with no spacer... still rubbing the inner a bit and sticking out.... My question is: can anyone provide a picture of a wider 275/40/17 or something availible that i can run on this 10.5 that is less than this giant 12.68 wide nitto....? I have searched for the dead 555R with no luck...
My thoughts: (i have searched many forums including this one, i know this has been asked before but not in this specific situation)
-Maybe a true 275 MT would be flush on a 275? I know ppl used to say they stretch but seems like they may be ok in some brands?
-I think a 305/45 would look stupid and i am not really into truck sidewalls
-If someone made a 295/40 I feel like that is the ticket... but now i think i should have got 18s rather than 17s....

PLEASE show some 10.5 pics to help a new guy out. I have attached 3 pics of my car. I know that if i had 10.5s 1/4 inch spacer and those old narrow 315 555Rs i would be ok... the tread width is a little less than 12.0 ... these R2s are just to darn big...

Thanks
 

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Noobz347

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I'm going to go out on a limb and say:

It's simple. Your wheel and tire combo is too big. 275 series tires on a 10 inch wheel is about as big as can go without getting into heavier modifications. A 315 would give you fits even it were mounted on a 10 inch wide wheel.

As your description stands, you will not get what you want out of that rim and tire combo without shortening axles --or-- deeper offset wheel and a big hammer or mini-tub.
 

KRUISR

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Apr 16, 2015
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If you have enough engine to need tires that size, I would suggest changing the rear end (drum brakes are not going to cut it).

If changing it, have it made to the correct size to fit.
 

a91what

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I am running 285/30/R18 and do not have fitment issues... but the fenders are rolled pretty well flat and the fenders have has some love with a BFH
 

89GTRound2

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Mar 17, 2021
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I'm going to go out on a limb and say:

It's simple. Your wheel and tire combo is too big. 275 series tires on a 10 inch wheel is about as big as can go without getting into heavier modifications. A 315 would give you fits even it were mounted on a 10 inch wide wheel.

As your description stands, you will not get what you want out of that rim and tire combo without shortening axles --or-- deeper offset wheel and a big hammer or mini-tub.

So I should restate. I have 10.5 cobra wheels and the 315 555R2s are to wide. I know brands run different and I am very close to fitting. I should have maybe asked if a NT05R in a 275/40 may fit on this 10.5. I the contact patch is 10.8 and the tire is 11.1" wide at the widest in a 275. Think that would look square on a 10.5? Also, the wheel fits in there fine the tires bulge a good 3/4 inch off that wheel. The hammering is in process and the lips are rolled flat.
If you have enough engine to need tires that size, I would suggest changing the rear end (drum brakes are not going to cut it).

If changing it, have it made to the correct size to fit.
Head cam intake care with an sc trim. I have 13 inch cobra brakes up front. Ill take a risk with some drums for a bit.
 

Noobz347

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Possible. Touched up your thread title a little bit. Will have to see what crops up.

I think @stykthyn runs 315s but he's running an SN95 rear with S550 backspacing. I don't know what wheel size he's running.
 

Rdub6

So while I wait to figure out my rear end issues
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I think @1hot87gt is running 315’s if I remember.
If I’m wrong, you still won’t be disappointed - he’s got a pretty sweet ride!
 

Andrews24

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Mar 13, 2021
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Moser 31 spline fox axles. The rims are these

https://lmr.com/item/WK-177802/must...Ee_bAjGFcrcY8DGBUInhes9_wt5ZELTEaAgYPEALw_wcB

20200912_185458.jpg
I do not have a picture of the tire from the rear of the car but they tuck up nicely.

Thanks, looks really good!

I’m in the process of my 5 lug swap, just switched to the rear yesterday - I have a 95 rear that is going in so I’m likely going to use an S197 10” for the rear... just trying to gather as much info as possible. I’ve actually seen the exact wheels I’ll be running on a few Fox’s in the 10” S197 offset/BS in the rear. The 9” wheel is only +30mm and will stick way out on my sn95 axles (IMO won’t look good)
 

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