So I bought Farbin's euroweaves.

[priapism]

Going too wide on a rim that isn't wide enough for the tire can make the car slower. Even if it "looks" right, it can lead to tread crowning, meaning the larger tire might actually have less tire on the pavement. Plus the weight factor. There was an article about it in Grassroots Motorsports about 6 months ago. It's best to go with the tire width that's optimal for the rim width, even if it's narrower.

Also, I wouldn't use the RA1 for a street tire, they're only really good for 12-14 hard heat cycles. After that they get hard and lose their grip. It's really hard to beat the Direzza Star Spec for an all-around tire good for street and track both. I love that tire, and both my cars handle great on the 205/50-15s on 15" D-Forces.

[nando]

Going too wide on a rim that isn't wide enough for the tire can make the car slower. Even if it "looks" right, it can lead to tread crowning, meaning the larger tire might actually have less tire on the pavement. Plus the weight factor. There was an article about it in Grassroots Motorsports about 6 months ago. It's best to go with the tire width that's optimal for the rim width, even if it's narrower.
.

those are nice theories, but you're not going to see that with a 225 on a 7" wheel, especially when it's what the manufacturer reccomends (and even says a 6" will work). maybe if you tried to put a 255 on a 6" rim, you'd have a problem with the tire not working well at all.

also, you really can't change the size of the contact patch. that's determined by the tire pressure and car's weight. the only thing you can really change is the shape (long and narrow, or short and wide). you might have more tire than you need (with the detriment of more weight and cost), but you'll never be able to make it have "less" contact area.

[FunfGan]

Very true, Im out of my knowledge in this area, so I'll leave it to those who know what they're talking about.

[priapism]

also, you really can't change the size of the contact patch. that's determined by the tire pressure and car's weight. the only thing you can really change is the shape (long and narrow, or short and wide). you might have more tire than you need (with the detriment of more weight and cost), but you'll never be able to make it have "less" contact area.

The article in GRM showed differently. I'm not a subscriber anymore so I can't link to it, but they showed the variances in contact patch. In their tests the larger tires went slower.

[Danny]

I just want something that is good on the street and sticky enough to have fun with. I lived my Dunlop starspecs and I wouldn't mind having those again if I can figure out the right size for them.

[FLG]

I'm picking up toyo r1r's today...they seem to be a good compromise between a street and track tire

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[Brian D]

I just want something that is good on the street and sticky enough to have fun with. I lived my Dunlop starspecs and I wouldn't mind having those again if I can figure out the right size for them.

Starspecs are available in 205/50 15, there's a lot of good tires in that size but they will be 23" tall, as will 225/45. The only good 15" sizes that are 24" overall (stock OD) are the 205/55 and 225/50, both of which have pretty limited selection.

[Jonny Cash]

205,50,15 rt615-k Is my vote.

[lambo]

205/50

**cough** **cough**

http://www.tirerack.com/tires/tires.jsp?tireMake=Dunlop&tireModel=Direzza+Sport+Z1+Star+Spec&partnum=05VR5Z1SS&vehicleSearch=false&fromCompare1=yes

I guess they are 9/10 of an inch smaller diameter than stock...

[Holland]

you can get RA1s and R888s in 225/50-15 ;)

225/50 R888's will be my next tire.

[Danny]

Are the 205/50s going to look the same as the 225/45s?

[Brian D]

Man's made up his mind! Good show.

[FLG]

Will let ya know how they handle 225 45 16 toyo r1r



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[Holland]

Are the 205/50s going to look the same as the 225/45s?

Yes. 205/55 is the proper size.

[LJ851]

205/50/15 or 225/45/15 only look ok-ish on a slammed car.