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 Post subject: ST-5 tires
PostPosted: Tue Feb 13, 2018 6:18 am 
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Forum Spectator
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I'm new to NASA ST-5 and I'm looking for clarification with regards to tire selection.
Can I run any brand?
Can I run any UTQG treadware?
I’m thinking of using Hoosier R7s and H2Os but open to other options.


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 Post subject: Re: ST-5 tires
PostPosted: Tue Feb 13, 2018 5:18 pm 
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Joined: Fri Aug 12, 2005 3:57 pm
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Location: Concord NC
rules say they must be DOT NON-autocross tires (No A7/a6/R1s/Rs AC etc) treadwear rating higher than 100 get a 0.3 break in the power/weight ratio

Tire size determined by weight...... More or less, 205 tires for cars under 2400lbs, 225 for cars 2749-2400lbs, and 245's for cars over 2749lbs

And Corvettes aren't allowed of course



https://nasa-assets.s3.amazonaws.com/do ... -18-18.pdf

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 Post subject: Re: ST-5 tires
PostPosted: Thu Feb 15, 2018 11:44 am 
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Postmeister in Chief
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Posts: 4249
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davidfarmer wrote:

And Corvettes aren't allowed of course

And neither are WRX's, STI's, Evo's, 350Z's, most 911's, any later model Mustang, and just about any other vehicle that was based classed in the PT rules as PTD** or higher. :roll:

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