plygasser47 Posted April 13, 2017 Share Posted April 13, 2017 Hello, I am currently building a 1973 240z E prod car. I am running 15x7 wheels according to the SCCA GCR. Could someone please point me in the right direction for tire size? Thank you Quote Link to comment Share on other sites More sharing options...
Chickenman Posted April 13, 2017 Share Posted April 13, 2017 Goodyear G19 Radial Cantilever. 23.0 x 9.0 -15 Purpose built for E-Prod . Cantilever sidewall tire made to fit on 7" E-Prod rim. available in both Dry and Rain tires. http://www.racegoodyear.com/tires/pdf/Goodyear_Sports_Catalog_2015.pdf 1 Quote Link to comment Share on other sites More sharing options...
Ben280 Posted April 13, 2017 Share Posted April 13, 2017 I'd look into Hoosier R7's. A 225/45R15 will fit nicely on a 15x7, and is 22.8" tall for nice gearing. Tread width is 8.6" Fairly inexpensive option at $260/each. https://www.tirerack.com/tires/tires.jsp?tireMake=Hoosier&tireModel=R7&sidewall=Blackwall&partnum=245ZR5R7&tab=Sizes http://www.hoosiertire.com/assets/Circuit%20Racing%20For%20Web%203%2029%2017.pdf Another good option if you are concerned with budget (not sure about skill level/experience/wallet size etc) would be Spec Miata takeoffs which are the right size (205/50R15) and should be really inexpensive. http://www.jbracingtires.net/ John is a great resource for used tires if you can't find anybody local to you that uses them. Quote Link to comment Share on other sites More sharing options...
plygasser47 Posted April 16, 2017 Author Share Posted April 16, 2017 Thank you for your help. The car is mostly together now with a few pieces and parts to go along with a trip to the paint booth. Quote Link to comment Share on other sites More sharing options...
Chickenman Posted April 17, 2017 Share Posted April 17, 2017 John Berget tire is a great place to buy used slicks. Particularly this time of year. He usually has scuffs available with as little as 10 laps. Usually in bigger Pro Sizes though. He may have some E-Prod cantilevers used. Give him a call. Quote Link to comment Share on other sites More sharing options...
gira Posted May 11, 2017 Share Posted May 11, 2017 plygasser47, Let me put in my two cents worth. They're not "EP" tires, as these size tires can be run in many classes. So there is not such thing as an EP tire. My favorite of all time the Goodyear 1782. Its a bias slick. If you want to lay down some fast times, use these. Goodyear is struggling with trying to get back into SCCA and doesn't really have their new compounding finished yet. The Hoosier R7 is a great tire, and my next favorite. It's a grooved DOT spec tire and you probably should run a slick since you're allowed. Hoosier makes a slick radial too called the S80. This tire never worked that great on the Z. Don't ask me to explain, I just couldn't get anywhere near the grip with that tire as I could with the cantilever. The sidewall is so soft that you'll have to change your spring rates big time. The lotus, and the miatias have reacted well to this tire but I proved to myself that Hoosier went backwards for me when they went from the Hoosier r80 to the s80. The setups between the cantilever and the radial are totally different, so I recommend choosing what's best for you and sticking with it. Fast laps- GY1782 430 compound longevity -Hoosier S80 longevity--hoosier r7 Greg Ira Quote Link to comment Share on other sites More sharing options...
jhm Posted May 12, 2017 Share Posted May 12, 2017 JBRacing is good, and here's another one worth checking (especially for cantilever slicks): http://stores.ebay.com/Race-Tires-USDRRT?_trksid=p4340.l2563. Quote Link to comment Share on other sites More sharing options...
RebekahsZ Posted May 15, 2017 Share Posted May 15, 2017 www.usedracingtires.com Jpglobal.com I've been able to buy single, slightly used A6 and A7 from them for as little as $75 shipped. Tell them what you are doing and ask for the freshest tire they have. Age matters as much as wear. Quote Link to comment Share on other sites More sharing options...
plygasser47 Posted June 30, 2017 Author Share Posted June 30, 2017 I ended up going with used Hoosier 23.0x 9.5-15. They just fit on the car. I have drivers school in August and hopefully at least one race in September. So if I destroy a tire I won't feel so bad. Thanks for all of the help. Dave Hopkins Quote Link to comment Share on other sites More sharing options...
Chickenman Posted June 30, 2017 Share Posted June 30, 2017 I ended up going with used Hoosier 23.0x 9.5-15. They just fit on the car. I have drivers school in August and hopefully at least one race in September. So if I destroy a tire I won't feel so bad. Thanks for all of the help. Dave Hopkins Have fun. There is nothing like a gummy set of real Road Racing slicks on a warm day to make you smile. When you start pulling both inside wheels at an Autocross, you know you have some serious grip!!! Quote Link to comment Share on other sites More sharing options...
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