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Topic: C3 Tire Specs

in Forum: C3 Handling Components

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Re: C3 Tire Specs (9/19)
7/20/15 4:01pm

wetvet
Standard Member
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Lake Oswego, OR - USA

Vette(s):
1972 Steel Cities Gray T Top. Original Owner, Original Paint and Interior. The running gear has been rebuilt. only 250,000 miles on the clock..

Joined: 10/17/2003
Posts: 553

John,
Good info.
Thanks.

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Re: C3 Tire Specs (10/19)
7/20/15 4:53pm

ebo

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Holland Patent, NY - USA

Vette(s):
#1 *1980 White, Red interior 14,000 mile #2 *1980 Red, Oyster interior 93,000 miles Resto project car, rebuilt to 383 stroker

Joined: 6/3/2008
Posts: 4421

Adams' Apple said: Thumbs Up

Joel, who is this "Kstyer" guy?

ebo

|UPDATED|7/20/2015 1:53:23 PM (AZT)|/UPDATED|

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ebo

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Re: C3 Tire Specs (11/19)
11/5/15 11:07am

jim in oregon
Former Member
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Milwaukie, OR - USA

Vette(s):
'78 Silver Anniversary T Top coupe,58k orig miles. THM350 auto, 350 L48, JBM headers,Oyster White interior,.as of Nov '15 in process of painting.

Joined: 10/19/2015
Posts: 71

I have a 78 Silver Anniversary t top..Found the build sheet behind carpet passenger side behind carpeting..in poor condition.

Secured the original factory to dealer invoice and window sticker for the car from GM Archive folks.

Car came equipped with P255/60 R15 RWL tires, factory #8YQBS, window sticker option designated as #QBS.

I cannot tell that the fender wells have been trimmed back..the fender lips are there and continuous from front edges to rear edges down by the rocker panel aluminum chrome-black trims.

Rocker panel trim pieces are 65.25" long.

My rocker panels are in fine condition, but need repainting on the lower black portion.I looked at repacement rocker panels and one of the Corvette parts suppliers shows rocker panels that are two differing lengths for the C3.

The tires I replaced with are BFG P255/60 15 RWL..

They don't rub on the fenders..

I did notice a 2" wide vertical rubbed mark on the dirt-grease-oil of the FRAME where the tires have lightly made contact-rubbed in time past when steering is fully locked for a tight turn..

I've never locked the steering that tightly when driving or even at very slow speed myself.

Anyone else seen that rubbed mark on the frame?..Jim

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Re: C3 Tire Specs (12/19)
11/5/15 7:03pm

Vman73
Former Member
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Gig Harbor, WA - USA

Vette(s):
1973 L82 4 Speed Coupe - Very original, well documented driver/survivor. 2016 Bend Regional NCRS Top Flight.

Joined: 10/2/2014
Posts: 405

Jim - there was some discussion a few months back regarding some tight turn frame rubbing. I believe it all started with a question on tire size or front suspension steering stops, unfortunately I cannot find the post. There were a few people out there that noticed the rub or polish of the frame bolts on the backside of the front tires.

Personally my '73 has evidence of some polishing on the left side during a full lock left turns. Not sure if its me or the previous owner. I purchased the car with a set of Radial T/A 225/70-15's on it and have replaced them with a new set of the same size.

Your '78 looks like a nice car. Can you post some pics and give us some history ?? Or did I already miss that information somewhere ??

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John Sigmund

valkman57@sbcglobal.net

NCRS Member 61302

NW NCRS Chapter Member

Duct tape is the new Black !!

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Re: C3 Tire Specs (13/19)
11/5/15 7:35pm

F4Gary

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Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.

Joined: 8/26/2006
Posts: 1409

dwa asked if '07 wheels would fit on a C4 ('85), not a C3.

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Re: C3 Tire Specs (14/19)
8/5/16 8:57am

vettejack

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Titusville, FL - USA

Vette(s):
1977 Coupe (White), 2006 Convertible (Victory Red). NCM Life Member #2221.

Joined: 12/19/2007
Posts: 154

I've got a new, 4 tire set of BFG's (RWL) P255/70R15 on order for my '82 (what the car was wearing when ordered).

However, I've got Cooper Cobra's on the '77 (P225/60R15). There is no manufactured date, so, I'm a bit concerned about the age of the tires (although there is plenty of tread and shows NO cracking or aging).

I'm contemplating taking the new BFG's ordered for the '82 and putting them on the '77.

Should I have any front fender clearance (turning) concerns for the '77?

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Re: C3 Tire Specs (15/19)
8/5/16 1:17pm

vettejack said: I've got a new, 4 tire set of BFG's (RWL) P255/70R15 on order for my '82 (what the car was wearing when�ordered).

�

I'm contemplating taking the new BFG's ordered for the '82 and putting them on the '77.

�

Should I have any front fender clearance (turning) concerns for the '77?

Jack, I believe the optional P255's on your '77 should have the same front clearance issues as '78 and '79 cars. Trimming the front and rear of the front fender well lip was reccomended by GM. However there are a number of people with P255's on their cars with no clearance issues. Assuming you are using stock wheels and your front suspension is in good shape you might be fine. Mount a pair on the front of your '77 and see if you have any issues. Check both tires with the wheels turned full right and full left and bounce the suspension up and down and look for tight spots. Let us know what you find.

|UPDATED|8/5/2016 10:17:48 AM (AZT)|/UPDATED|

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John Sigmund

valkman57@sbcglobal.net

NCRS Member 61302

NW NCRS Chapter Member

Duct tape is the new Black !!

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Re: C3 Tire Specs (16/19)
8/16/16 2:20pm

Espressomorning
Former Member
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, - Canada

Vette(s):
1972 Corvette Stingray Coupe, 350 Base engine, p/s, p/b, a/c, automatic. All as original other than someone repainted it a Bright Yellow. It was Sunflower Yellow originally. Drives great, a nice 20 footer.

Joined: 7/13/2016
Posts: 11

Just a FYI, my '72 had BFG's P235/60R15's all around when purchased, no problems

and they look good.

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Re: C3 Tire Specs (17/19)
8/16/16 4:17pm

F4Gary

Gold Member
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Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.

Joined: 8/26/2006
Posts: 1409

Espressomorning said: Just a FYI, my '72 had BFG's P235/60R15's all around when purchased, no problems

and they look good.

That's what I have on my '72. Wish I had gone with 245/60's.

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Re: C3 Tire Specs (18/19)
8/19/16 1:59pm

73shark
Limited Member
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Overland Park, KS - USA

Vette(s):
1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day.

Joined: 7/9/2003
Posts: 866

I think that the 82 and earlier years had 255/60-15 tires. 70 series tires might be too tall and have some serious rubbing issues. That's (255/60-15) what I have on mine with no issues.

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1973 L-82 4 spd

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Re: C3 Tire Specs (19/19)
8/20/16 4:35am

alohajohn
Former Member
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Vette(s):
1972 T Top, Mille Miglia Red, auto, ac, power windows, power steering, tilt/tele, power brakes, black leather..

Joined: 3/10/2013
Posts: 24

I have BFG 235 60's on my '72, there has been some minor rubbing on the frame I guess by the previous owner but in the 4 years I have owned the car no problems. I also happen to like that the car sits lower..

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