Which R-comps for Auto-X? - Toyota Yaris Forums

ozmdd · 02-17-2010, 03:15 PM

Couple of things:

R-comps on a stock Yaris are going to get shredded on the outside edge, and are a real risk for rollovers, due to the high COG and extreme grip.

Kumho V710's and Hoosier A6 are top-notch autocross R-comp tires.

dunlop Star-Specs and Kumho XS are excellent, affordable and durable "Street" tires, very popular in ST-based classes. The Bridgestone RE11 is also getting a lot of love from people who ran at Nationals in Lincoln (concrete) last fall. All three are tires you could easily use as daily-drivers in most non-snowy parts of the country and get 10-15K miles, even with occasional autocross use, so you save $$ on new wheels.

As for the Rear sway bar, there has been some debate about it being legal for the Yaris in HS. Jason may have better info than I do based on his experience, but I did email the rules representative at the SCCA national office, and he interpreted the rules in favor of the TRD RSB, because it is officially listed as a port option for Toyota Yaris with a corresponding part number. FYI.

IMHO, your car is not going to be able to take advantage of the R-comps as it it currently prepared. Try something in a street tire and see how you do, then consider what prepartion you'd eventually like to do to your car.

One other thing- tirerack.com has a $50 rebate on Dunlop Star-spec's for the next month!!

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02-17-2010, 03:15 PM	#34
ozmdd Reluctantly Crouched... Drives: 2008 Yaris HB M/T Join Date: Oct 2008 Location: DFW, TX Posts: 867	Couple of things: R-comps on a stock Yaris are going to get shredded on the outside edge, and are a real risk for rollovers, due to the high COG and extreme grip. Kumho V710's and Hoosier A6 are top-notch autocross R-comp tires. dunlop Star-Specs and Kumho XS are excellent, affordable and durable "Street" tires, very popular in ST-based classes. The Bridgestone RE11 is also getting a lot of love from people who ran at Nationals in Lincoln (concrete) last fall. All three are tires you could easily use as daily-drivers in most non-snowy parts of the country and get 10-15K miles, even with occasional autocross use, so you save $$ on new wheels. As for the Rear sway bar, there has been some debate about it being legal for the Yaris in HS. Jason may have better info than I do based on his experience, but I did email the rules representative at the SCCA national office, and he interpreted the rules in favor of the TRD RSB, because it is officially listed as a port option for Toyota Yaris with a corresponding part number. FYI. IMHO, your car is not going to be able to take advantage of the R-comps as it it currently prepared. Try something in a street tire and see how you do, then consider what prepartion you'd eventually like to do to your car. One other thing- tirerack.com has a $50 rebate on Dunlop Star-spec's for the next month!!