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Topic: Tire Pressures

in Forum: C3 General Discussion


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Tire Pressures (1/9)
 1/15/17 3:43am
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'm running BFG 235/60'S on my '72 at around 25 PSI, I'm getting advice that the pressures are too low so I would appreciate feedback from you guys.
Also, and I may have asked this before, rubber or polyurethane bushes for the rear spring cushions.??
Thank you in advance,
 

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Re: Tire Pressures (2/9)
 1/15/17 3:12pm
johnu
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Scottsdale, AZ - USA

Vette(s):
1981 Corvette Two-Tone Claret color, 4 spd, C7 Vert


Joined: 5/23/2007
Posts: 614

I'm a 30 psi kinda guy!   Big smile

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      Only 32 years together
Re: Tire Pressures (3/9)
 1/15/17 5:54pm
73shark
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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: 864

When they went to radials in '73, the door sticker said 20 psi all around.  That rides good but handling was a bit squirrelly. I ran around 32 psi except for autocrossing and then ran in the 42 +/-3 psi range.

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1973 L-82 4 spd

Re: Tire Pressures (4/9)
 1/15/17 6:27pm
manchestersharkLifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.


Joined: 10/31/2007
Posts: 2382

30 on my T/A's

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Re: Tire Pressures (5/9)
 1/15/17 9:15pm
F4GaryGold Member
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Grapevine, TX - USA

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


Joined: 8/26/2006
Posts: 1406

30 to 32 for my Coopers.  More if autocrossing.

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Re: Tire Pressures (6/9)
 1/15/17 10:07pm
Tomtall
Former Member

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Vette(s):
1973 Coupe -- 454 / 4 speed - Black on Black, Greenwood aftermarket turbo hood, Greenwood GTO style front bumper.American Racing Vector rims.


Joined: 3/5/2016
Posts: 43

I switched to Mickey Thompson Sportman S/T this summer and found they liked 36 - 38 on the street. They are a very gripy tire. If I run them lower than that pressure the car gets on the mushy side. It took a while to find the sweet spot.
Re: Tire Pressures (7/9)
 1/19/17 5:12am
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

Guys,
 
Thanks for your replies, the consensus seems to be 30psi so that's what my tires have now. I'm finding the ride to be firmer after going up from 25psi but that's ok..
 
Also changed out the totally crushed rubber spring mount cushions to urethane, it gave me a little extra rear ride height as well..


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Re: Tire Pressures (8/9)
 1/20/17 12:40pm
Kentvetteuk
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, - France

Vette(s):
1978 L48 Auto. Red with Oyster Leather interior. Owned since 1990.


Joined: 8/21/2002
Posts: 83

I ran my '78 on 225/70R15s at 20 psi for 25 years.  The tyre wear was minimal and even and the ride was fine for me.  BUT, about three years ago I upped the pressure to 25,more to see what it felt like than any other reason.  Definitely a harder ride, but a tad lighter steering feel and slightly quicker response.   I've recently put new tyres on and have run them at 24.  So far so good.

It's a relatively stock car, coming up on 39 years old, so I'm not looking for, or expecting C6 performance levels!Smile


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Stephen J Irons
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Corvettes of Southern California
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Red Corvettes Have More Fun!
Re: Tire Pressures (9/9)
 1/20/17 4:54pm
gtr1999
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CHESHIRE, CT - USA

Vette(s):
1969 350 4 spd drop top 1972 350 auto coupe


Joined: 5/2/2016
Posts: 64

I run 30 psi in my Radial TA 225-70 x15's. I like the ride at that point. Tire wear? well I only put on 2-3k miles a year so they will be replaced for age before I wear out the thread.

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