^Yes.

FWIW, RT615s in 245/45/17 can weigh anywhere from 28lbs 1oz -> 28lbs 8oz.

I weighed each one individually using a postal scale.

Let me just say that I'd never run these tires again without shaving them first.

 

Shaving them?
why is that? I was thinking about them for my next tire... No track just spirited back roads in Vt.

(Sorry for off topic)

 

I think that was sarcasm lol

 

PS2 are great and light, decent in the rain and will hold up to light track use as well, about 5 laps at a go. The tread wear seems pretty reasonable as well they are rated at 220. The only negative is a slight loss of initial turn in response, but midcorner on the street grip seems about the same as Yoko's.

 

fill the tires with helium, they will make your car float

 

No need to shave your tires for the street. Shaving can help dedicated track tires that only get used in hot, dry conditions. Those big, thick tread blocks cause excessive heat to build up when the tire is new and being used on the track for the first few sessions. That causes the core to overheat and the treads to chunk. If you shave the rubber, you'll have more stable tread blocks that heat up more evenly. Paradoxically, shaving a few 10th of an inch off brand new tires can make them last longer on the track.

The same thing is generally NOT true on the street, where your heat cycles are not nearly so radical.

HTH,

Emre

 

Good thread!
I went with 18x9 et30 Work XD9's with Avon Tech M500 in 245/40/18 for my DD wheels.

 

Nice

 

Using that logic you could swap in a tilton CC, Carbon driveshaft, 16'' race rims with slicks willwoods which would be close to: 80lbsx8 would be the equivalent of 640lbs in weight reduction?

I am going to look for this thread on Corvetteforum.com where a guy just swapped out his draglite combo to 20' rims added over 30lbs on the rear wheels alone the difference was 11whp.

 

No ****! find that thread

 

i went from the stock evo 8 rims to the mr rims which are supose to be 3 pounds lighter each and i felt no differance at all

 

Good info

 

I'm going to have to search some more tonight Evolved it was on corvetteforum.com and you can find threads that talk about the guy who just dynoed, but no link or title.

There are multiple threads about track time reduction etc. The general rule of thumb is 1lb unsprung=4lb sprung. There are alot of other variables, bigger rims cause a lack of hp even if the weight is the same, alignment, tread patterns all are important.

Just for giggles the old saying of 100lbs=10hp is close to what that guy dynoed at30lbs of wheel and tire weight x 4=120lbs and this guy saw a loss of 11whp pretty close to 100lbs=10hp.

Race teams don't spend huge cash to remove grams/ounces all weight removal is good especially unsprung weight. Given most EVO's are street cars there is only so much most are willing to go and HP is much easier to make then buying the lightest rims of the smallest diameter, ultra light brakes, etc for acceleration. The lightest isn't always the best on the track where reliablilty is key too. Alot of thought needs to go into these things it's alot more complicated then just dropping weight usage, strenght, heat dissipation, etc etc are all paramount too.

Good luck with you quest and I'll try to find that post.

 

Thank you Jasil. I have been thinking a lot about i all...

 

There's nothing to think about. Figure out the following information:

(1) Goals/Needs. Is this a street tire? Snow tire? Open track tire? Auto-X tire? Drag tire? Etc. Will it be used in the wet? In the dry? Etc. What temperature range do you expect to encounter?

(2) Size. Not all tires are available in all sizes. Different sized tires will work on the same wheel. Figure out your ideal tire size and maybe 1 or 2 alternate sizes that would also work.

(3) Budget. Who cares if PSC's grip better than RA-1's if you can't afford them? Yoko Advan Neova AD07's might have better grip and temp stability compared to Falken Azenis Sport RT-615's, but if you're budget doesn't stretch to $250+ per corner, then they wouldn't even be on your radar.

Once you've figured all this out, you can generally narrow your choices down to 2-3 tires that will suit your needs. Only then is it worth thinking about things like tire weight and construction. You're putting the cart before the horse here.

Emre