I am contemplating to get these for the stock rims:
Falken RT-615 http://www.falkentire.com/615micro.htm
I have high hopes that they take me to the track / around the track and home again. And that for many weekends.
However, closest size they come:
255/40/18 (should actually be 8.5 or larger rim!) or 245/40/18
That’s a 2.5 and 3.5% difference in diameter to stock.
Can that easily be reprogrammed (e.g. via EFILive) to fix speed etc.
Do I throw any error codes?
Will Odo – Navi or anything else get confused if I do not reprogram?
When me stockers wear out, Azenis615s will be on my car. I used the Azenis RS, the old one, for autox and street and have NEVER had street tires stick like them. They also wear very well, 15K miles on my MR2Spyder...but they were utterly bald when replaced.
In regards to size, as long as all four tires are the same, you shouldn't throw any codes...but the speedo will be different, just use the GPS for the correct speed.
Note* Azenis are known to have very stiff sidewalls and usually weigh a little more than less focused meats.
Yes, the RA1s are a good choice, fantastic longevity with only a small tradeoff of grip vs. Kumho or Hoosier R's. I don't know of anyone having RA1s last longer than 5k miles on the street, though. Come to think of it....most F1 drivers don't last much longer
The Azenis would be used for "street tire" classes, the RA1s are R-compounds and would not be allowed in street tire classes....if, of course, that is important to you. Either way they're both awesome meats.
Silver: The 255 will be a faster tire (HMO)... it's a good bit wider, it's a little taller (you dont need shorter tires with the hp/tq the V puts down), and most importantly: the "approved rim width" shows 8.5"... perfect for the stock rims.
I guess for the price that's a good tire(Falken), but I've just never trusted them. I just personally have never seen them on an autocross and at a 200 treadwear, that doesn't sound "a notch below a race tire". But that's just me.
If money isn't that much of an issue, I would personally go for the BF Goodrich T/A KD in the 245/40 18 size. These have been heralded up and down for their all out dry grip. These are truly a tire that is just one step below a race tire. And really, the price is actually very good at $216 per tire.
I cannot say enough about the Azenis. TBJS, if you check the equipment stats of the Nationals, you'll see that the TAKD are used most with the Azenis next popular. If the prices are similar, I'd go with the BFGs but usually they are too expensive. The grip difference on a typical autox will only be a tenth or two. You can't go wrong with either. Again, when the F1s are done...the new Azenis will go on.