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jhp

ST-5 tires

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jhp

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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davidfarmer

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/document/document/12742/ST5_Rules_2018--v1.4--1-18-18.pdf

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Greg G.

 

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.

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