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GT40 Tech - Chassis,Brakes,Tires,&Wheels Chassis and Handling.

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Old 24th March 2018, 01:57 PM   #21
rcarr
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Re: Rear tire size question and 2"/4" flares......

TOPICAL THREAD
I have driven partially cross country, Chicago-W. Nebraska and some Las Vegas area
Driving on the BFG’s. I consider the BFG’s definitely dangerous on the GT 40. Have had them snap getting on on-ramps even taking it easy on the throttle hot or cold days. It was my first impression driving it for the first test drive on! Couldn’t agree with Rick Muck more.
Just installed a lightly used set of Avon’s ... Night and day difference ! Can think of several other brands I would use before the hard and slippery BFG’s !
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Old 26th March 2018, 09:15 AM   #22
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gsharapa
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Re: Rear tire size question and 2"/4" flares......

Quote:
Originally Posted by 70gsconvt View Post
Awesome looking car Gary. Does your car have any rear quarter extensions? Or does the 295 tire fit in the stock fender well? That may be wide enough for me. But I'd have to see an ass end shot of the car to be sure.

And Walter, I'm glad to see you're a "Keeper of the Speed".
No extensions or flares on my CAV GT 40 as it is the Standard MK1 design. I had bigger Mickey Thompson Radials on it that slightly rubbed on the drivers side (big bumps) on the lower rear bottom Quarter. It really had the big tall tire look of the 60s but AVONs are much better tire.
Attached Thumbnails
Rear tire size question and 2"/4" flares......-0040-jpg   Rear tire size question and 2"/4" flares......-0060-jpg   Rear tire size question and 2"/4" flares......-cav-gt40-169-10-16-17-jpg  
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Last edited by gsharapa; 14th May 2018 at 10:23 PM.
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Old 26th March 2018, 01:27 PM   #23
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Re: Rear tire size question and 2"/4" flares......

Quote:
Originally Posted by Cobrajet View Post
At the time this video was taken my rear track is 71 3/4" (camber @ -1.1) and front track is 69 3/8" (camber @ -1.8). There is no tire rub at these settings.
How are you defining track? Your numbers are really "large".
Track is usually defined as the distance between wheel center-lines.
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Old 26th March 2018, 03:00 PM   #24
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Re: Rear tire size question and 2"/4" flares......

Hi Bob, I went with the outside measurements, sidewall to sidewall, for this RCR example. Since the OP was wondering about widest combinations within a +2 or +4 and what would fit without tire rub.
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Old 26th March 2018, 04:13 PM   #25
70gsconvt
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Re: Rear tire size question and 2"/4" flares......

I have a CAV GT40 MKI Std body and I'm running AVONs and love them!

Frt: 225/60R/15
Rear: 295/50R/15

Looks great. This is the kind of info I was looking for. I don't think I'll be needing flares, depending on the manufacturer. Thanks again.
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Old 6th April 2018, 04:26 AM   #26
Deno
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Re: Rear tire size question and 2"/4" flares......

I am right in the middle of the same decision on my Tornado Mk-1 body.
Looking at some American Racing VN427 rims (Halibrand style), a Sydney tyre company is offering a Wheel & Tyre package that was to good to pass up.

I had to decide on the Backspace or Offset for the Rims, taking into account what the actual tyre width was to fit under the mudguard to pass ADR in OZ.

Planning on 18" Rims, as you a better tyre choice for the future here in Oz.
15" won't fit due to the Caliper & Rotor sizes, 16" does not give many options.

So after much measuring and soul searching, it looks like 18x8" Fronts with a 5" Backspace and 18x10" Rears with a 6" Backspace.

Running on Nitto NT555 G2 Tyres.
Front 235/40R18 (Actual Size 25.39"/645mm DIA x 9.45"/240mm Wide)
Rear 295/40R18 (Actual Size 27.28"/693mm DIA x 11.85"/301mm Wide).
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Old 9th May 2018, 08:55 AM   #27
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Re: Rear tire size question and 2"/4" flares......

Quote:
Originally Posted by Deno View Post
I am right in the middle of the same decision on my Tornado Mk-1 body.
Looking at some American Racing VN427 rims (Halibrand style), a Sydney tyre company is offering a Wheel & Tyre package that was to good to pass up.

I had to decide on the Backspace or Offset for the Rims, taking into account what the actual tyre width was to fit under the mudguard to pass ADR in OZ.

Planning on 18" Rims, as you a better tyre choice for the future here in Oz.
15" won't fit due to the Caliper & Rotor sizes, 16" does not give many options.

So after much measuring and soul searching, it looks like 18x8" Fronts with a 5" Backspace and 18x10" Rears with a 6" Backspace.

Running on Nitto NT555 G2 Tyres.
Front 235/40R18 (Actual Size 25.39"/645mm DIA x 9.45"/240mm Wide)
Rear 295/40R18 (Actual Size 27.28"/693mm DIA x 11.85"/301mm Wide).
can you post a picture? I was thinking something similar but with 17" rims and was wondering how it looked
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Old 11th May 2018, 03:29 AM   #28
Ryan Love
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Re: Rear tire size question and 2"/4" flares......

Jason has some the flares fitted to his RCR. I cant remember what size they were.


Jason's Coyote Powered RCR40 Downunder


I think RCR do a different wishbone that allows the same 205 & 295 width tyres to be used, but moves the wheel centres out in the wheel wells. Best contact RCR


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Old 14th May 2018, 12:55 AM   #29
Deno
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Re: Rear tire size question and 2"/4" flares......

These are the VN427 Wheels I ordered from St George Tyres in Sydney.
Package Deal with Nitto Tyres. Deal is with 18", but when you place your order they could probably do 17" instead. 2 photo's one 17" and the other 18".

I had ordered 18x8 and 18x10, but unfortunately can't get the 18x10 anymore, only 18x9.5".

With the change in Rear Rim I had to re-think tyres and Backspacing.
Nitto Invo - Front 245/40ZR18, Rear 275/40ZR18.

RACING VN427 SHELBY COBRA WHEELS 5X120 CUSTOM OFFSET AND BACK SPACING

Vintage Wheels offers a VERY Similar Package.
427 5 LUG Shelby 17 with Nitto NT555ZR : Vintage Wheels, Mustang, Hot Rod and Muscle Car
Attached Thumbnails
Rear tire size question and 2"/4" flares......-american-racing-vn4271791711graynt555-jpg   Rear tire size question and 2"/4" flares......-427-pd17-gray-nt555-jpg  

Last edited by Deno; 14th May 2018 at 01:07 AM.
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Old 14th May 2018, 01:19 AM   #30
Ryan Love
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Re: Rear tire size question and 2"/4" flares......

I had 295R19 on a 9.5" on the BMW and was going to go to a 275 with the next set off tyres but sold the car prior to doing this. I think the current ///M3 runs a 275 or a 285
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