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Thread: latest choices?

  1. #11
    Join Date
    Mar 2010
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    Kamloops, B.C. Canada
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    187

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    The RA1 is an R compound tire, the T1R is a street tire. Quite different.
    Westfield Miata under construction.

  2. #12
    Join Date
    Jun 2007
    Location
    Athens, Georgia
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    343

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    I have been very happy with my Toyo R1Rs. Great grip with some ability to progressively rotate in the dry, will go through standing water without loss of traction, and after 1 season of autocross, only 2/32nds gone from tread (6/32nds vs. 8/32nds when new). 9 class wins in 10 season points events against non-LSIS with A06s and V710s-not bad for a street tire! The tires were heat cycled out by the end of the season and needed to be replaced (11 events and 1 school).
    Brad
    2013 Boss 302 Mustang
    2005 Caterham SV (gone but not forgotten)

  3. #13
    Join Date
    Jul 2009
    Location
    Daly City, CA
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    628

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    Quote Originally Posted by southwind25 View Post
    The Toyo ra1's seem to be a good price. they are deffinitly in the running.. they seem to be more aggresive than the t1-r?
    RA1s are much grippier and can be run to the cords without heatcycling out.
    06 Lotus Elise
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  4. #14
    Join Date
    Oct 2007
    Location
    2357 copley rd akron, ohio
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    720

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    Hmmmm...
    So it looks like the Toyo's are well represented here. Ra's a little stickier dry and slippery wet than the R1r's eh? i am liking the RA's.

    anyone have experience with the bridgestone potenza re-11's?
    just curious..
    Southwind, Robert and Mary Kansa
    1600 x-flow Birkin s3-(lotus 7)
    start milage 1,486...current 14,235.9!!! and counting.
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  5. #15
    Join Date
    Jul 2009
    Location
    Daly City, CA
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    628

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    Quote Originally Posted by southwind25 View Post
    So it looks like the Toyo's are well represented here. Ra's a little stickier dry and slippery wet than the R1r's eh? i am liking the RA's.
    .
    RA1 are R-compounds and are a lot stickier than the TR1s - multiple seconds worth on the track.
    06 Lotus Elise
    V8 Stalker #159
    02 Dodge Viper GTS
    16 Dodge Charger Hellcat

  6. #16
    Join Date
    Oct 2006
    Location
    Cincinnati
    Posts
    3,628

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    And RA1's w/o tread are seconds better than treaded RA1's. (Mechanically or naturally shaved). Unless it is wet(:.
    Kitcat:AKA, Sir Spinsalot
    '97 Caterham Super Sprint, 1700 Crossflow-sold
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  7. #17
    Join Date
    Jun 2007
    Location
    Athens, Georgia
    Posts
    343

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    RE-11s are comparable to R1Rs (UTQG 140-minimum street tire rating) and both are common ST Class autocross tires. The consensus around the Atlanta Region is that R1Rs are better on lighter weight cars, while RE-11s are better on heavier cars. Also a popular choice is the Dunlop Direzza Star Spec, if you want to stay on (barely) street tires.
    Brad
    2013 Boss 302 Mustang
    2005 Caterham SV (gone but not forgotten)

  8. #18
    Join Date
    Mar 2009
    Location
    JOPLIN, MO.,USA, EARTH
    Posts
    288

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    Got used to Ra1s...... then tried a set Nittos......scary... tire spin in 4th gear. Once you get used to Ra1 traction, going to a harder tire really changes the way you can drive. Went back to Ra1s. Have been told by two friends that are on 888s that they are as good as Ra1s so will try them next time.

  9. #19
    Join Date
    Mar 2010
    Location
    Kamloops, B.C. Canada
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    Just to clear up some potential confusion here, there are 2 similarly named Toyos being discussed here: the T1R and the R1R. The T1R is a genuine high performance street tire, with a comfortable ride, decent wet performance and some semblance of tire life. The R1R is a max performance tire aimed at the street tire autocross classes that is much stickier, stiffer and shorter lived. The R1R on the track on heavier cars will blister fairly easily, as it is designed to get heat into it in the short time of an autocross run. I suspect, but don't know, that it would be OK on a 7.
    Westfield Miata under construction.

  10. #20
    Join Date
    Apr 2008
    Location
    PNW
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    339

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    Another thing to consider is the weight. Everyone here is talking about the grip levels, with some talk of wet traction issues, but there is a significant difference in tire weight.

    A R1R is about 2.5 pounds heavier than the same sized T1R. It affects handling significantly, especially on cars as light as ours. The Avon CR500s are the lightest tires for our cars. The T1R is the next lightest for a street tire.

    Also, a big difference can be in sidewall stiffness. Typically, the R compound tires have a significantly stiffer sidewalls which often accounts for the extra weight. Some believe that the uber stiff sidewalls are detrimental to the handling on ultra light cars like ours.

    The ZZRs that were mentioned earlier (I also just bought these) are a Caterham specific version that are lighter with a less stiff sidewall that you would get in a standard ZZR that you bought for an M3 or 911.

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