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Author Topic: 1970 Cuda Spring Relocation Kit, question about tire sizes  (Read 1925 times)

Offline 70_Hemi_Cuda

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1970 Cuda Spring Relocation Kit, question about tire sizes
« on: July 23, 2010 - 09:22:58 AM »
Hello all,

I am in the middle of restoring my 1970 Plymouth Cuda and while all the metal work was being done I had a mopar performance spring relocation kit added so it moved my springs in 3 inches. My question is what size tire are people able to run after doing this? I know the limiting factor now is the inner wheel well as I did not mini tub it.

I know with no spring relocation you can fit 275's but I'm hoping for much wider then this now that the springs are moved in.

And I would measure myself but I dont have the car back yet from the body shop
1970 Plymouth Cuda 383 4-Speed Shaker
2001 Audi A6 4.2 V8
1992 Mitsubishi 3000GT VR4

Cuda-Challenger.com

1970 Cuda Spring Relocation Kit, question about tire sizes
« on: July 23, 2010 - 09:22:58 AM »



Offline 71Plym

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Re: 1970 Cuda Spring Relocation Kit, question about tire sizes
« Reply #1 on: July 23, 2010 - 02:41:12 PM »
I used the 1" offset kit from Dr Diff and can fit 295-65s in the stock wheel wells.


Offline ntstlgl1970

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Re: 1970 Cuda Spring Relocation Kit, question about tire sizes
« Reply #2 on: July 23, 2010 - 03:31:10 PM »
Depends on the car (because the assembly tolerances are all over the place on these cars), how low (as in how much of the tire you want up in the wheel well) you want it, and if you are willing to fold or cut the fender lips. On mine I can fit a 305 45 17 (almost 28" tall) with a rolled fender lip, but the tire will hit the inside of the wheel house both inner and outer sides if it's too low or you hit a really big bump. Goody has 295 18's on his and I think they clear everything. If you go with a lower profile tire, you can fit more width because the tire is shorter.

Spend time measuring your car - ymmv
70 Cuda, 440, 440XT, A618 A/T, Spec-Rite 3k 10" lockup converter, 3.91's, Megasquirt MS3x v3.57, GPIO megashift trans controller, EDIS8 waste spark ignition, Innovate wideband, Firm Feel upper arms, torsion bars, springs and strut rods, QA1 DA shocks. I did everything on this car except the fancy paint stuff and I drive it...and I can't seem to stop messing with it....

Offline matt63

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Re: 1970 Cuda Spring Relocation Kit, question about tire sizes
« Reply #3 on: July 23, 2010 - 03:51:59 PM »
The other variable which will affect the max tire size is wheel offset.  Ideally you would buy the tires and wheels you want (knowing there is room) and narrow the diff. to get them located properly.  If you don't want to narrow the diff then wheel size/width and offset would have to be known to get accurate recommendations. 
Matt in Edmonton

'68 Valiant
'73 Cuda 340 4 speed (408) SOLD

Offline 70_Hemi_Cuda

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Re: 1970 Cuda Spring Relocation Kit, question about tire sizes
« Reply #4 on: July 26, 2010 - 10:18:45 AM »
Thanks for the info everybody.

I figure the best bet would be to get the car back from the body shop, take my time making sure I measure everything correctly. Like they always say, measure twice and order the rims once lol :D
1970 Plymouth Cuda 383 4-Speed Shaker
2001 Audi A6 4.2 V8
1992 Mitsubishi 3000GT VR4

Cuda-Challenger.com

Re: 1970 Cuda Spring Relocation Kit, question about tire sizes
« Reply #4 on: July 26, 2010 - 10:18:45 AM »