ikagan

I have the 235/40 x 18 RT615 for about 1500 miles, compared to the RE040s they have a MUCH better grip in the dry (I miss the easy tail slides…) and about the same in the wet.

Steering response is quicker and the noise levels are lower than the RE040s.
They are about 3 lbs lighter than the RE040 (as per my bathroom scale).

I can’t judge the tread wear due to the low mileage, the RE040s lasted 23K miles including 2 track days.

I paid $760 including installation/balance/sales tax.

NomisR

Just got my Rt-615 on Saturday and took a long drive yesterday. Haven't been able to take the corner really fast as my gf was on the car but so far, they are a lot quieter and responsive than the RE040 as well as a lot more comfortable. The stopping seems better too although haven't done any heavy braking but overall, they seem better. I'd definately recommend them from what I've experienced so far.

willhave8

for those of you with the Azenis, why didn't you get the 245/40-18's? They should also fit the OEM wheels and are closer to the diameter of the 225\45-18 OEM spec.

I ask because I am leaning toward the 245's and want to make sure I am not missing something on fitment...

ikagan

Size 235/40 x 18's are:

1. Lighter ( 24.3 lbs vs 26.5 lbs for the 245/40)
2. Slightly shorter overall dia = lower gearing= better acceleration
3. 8" rim is too narrow for 245/40 size, although they are approve by Falkan.

For me #1 was the main reason.

garynjr

Dude, what are you doing with your GF on the car? Wouldn't it be nicer of you to let her sit in it with you?
LOL JK...

L8APEX

The OEM 8" rim is NOT too narrow for a 245 tire. *" is the smallest width recommended for the 245 tires, they fit fine, no rubbing scrubbing or issues. Who told you that an 8" rim is too narrow for the 245's?

ikagan

I did not say they will have a fitment issue, they will fit fine but 8" is marginal
for 245. Can you find 1 manufacturer who uses 8" wheel for 245 tire?

JeRKy 8 Owner

A tire distributor down here (and some **** I've read on various car forums) has convinced me to try the Toyo T1Rs when I'm through with these Potenzas.

All I know is that if the cornering, side wall, and to-the-limit performance ends up being worse than the RE040s, there will be blood. Oh yes, there will be blood.

L8APEX

just a bit of advice, to anyone looking at the Azenis 615 as a daily tire. These tires are very soft. Read that to say, the smalest things can damage them. I inspected mine last night for a track event this weekend, and there are little nicks in them, nothing major, but the rubber is so soft, that little things cause small amounts of damage. These should really be reserved for track time usage.

Ophitoxaemia

245/40/18 kumho mx have worked great for me, were also very good at the track (laguna seca) with no apparent heat fade. the wet traction doesnt blow my mind, but these tires are NOISY!

james

KAtC10

Wow, good reviews of the Pirelli M+S. Maybe it's cause I'm in so-cal, or maybe they didn't get balanced right when I got them, but I replaced my stocks tC tires with those tires, and HATED them. They rode all funky and shakey. Gave them to my friend when I sold the car and he experiences the same ride with them. Weird.

garynjr

That quote from me was taken out of context...
I've never even tried them... I was just noting what the other posts had said about them... Just for the record...
Could be the climate! If you notice, most of the people that like them are in the cold. It was finally over 50* this weekend here... Actually hit 75 (of course now it's back to 35* anyhow... My stockers performed a hell of a lot better on warm asphault then they do on the cold stuff! Even heard them churp a time or two. While in the cold they spin with no squeeks at all...

salituro64

I was told that the rubber compound designed for HP summer tires get hard when the temperature drops around freezing. Therefore their grip is severly impacted.

modforce

I went to Cosco for my BFG's and they have great prices on them as well and will give you the road hazard warranty for free with tire rotation for free as well!

GeorgeH

iTrader: (2)

T1-Rs here. None of the turn-in mushiness of the T1-S. Great all-around tire. Not as sticky as the RT-615s but will wear longer, have better hydroplane resistance, and are very quiet. If you want the ultimate grip get the Azenis or Yoks, but the Toyos are a great overall street tire.

The 245 T1-Rs work pretty good on an 8" rim, but 8.5 is better. On the 8" rim you will notice that the slip angles let go a little at 70% or so, but then the tire keeps on gripping. It's a bit odd at first - the line widens a little, but you stop noticing it after a while as you adapt to it. Which is to say, you use a bit more steering lock on the limit than the OEM tires. They still are very progressive and easy to control, it's just that you use a little more steering.

On an 8.5" rim this phenomenon seems to disappear, based on my experiece with my new 18x8.5 SSRs.

Nopstnz

Just had a set of yokohama avs es100 in 245/40/18 put on today. They look great but haven't had a chance to test them out handling wise. I think they feel more road than the stock potenzas(rides a little rougher).

LionZoo

GM uses 245/45-18 on the Kappa twins on 18x8" wheels.

rled

Just had a set of Conti Sport Contact 2's put on my car. I was running Avon 550 A/S. 245/40/18. I went back to the OEM size of 225/45/18. It is like a different car. Sooo much quieter and the ride is better. I was getting some uneven wear on the Avon's. I think the 245 width is almost too wide for the rim. Hope the Conti's stay quite! I hate obnoxious tire noise! Im done.

garynjr

I just got a set of BFG KDW2's, well, actually, I have about 3k miles on them now...
The difference is pretty substantial from the stock...
That is until I figured out that the tire pressure should be about 10lbs higher then the stock tires... :D Then I realized that they are Great!
Not the Cheapest in the bunch but they look really sweet with the interesting tread pattern. They don't track all over the place like my stock ones did. They handle 100 times better then the stock in colder weather! Good all Year tire for the PA and south climate. Haven't driven them in any snow yet. But in the rain they are really grippy.
Anyway, Just thought I'd put that in there...
P.S. I drive hard every day! They Srick when you want them to and slide a little when you expect them too. Very predictable and consistant!! I'm using the stock size wich I think works very well for street applications... Any lower profile and I'd be looking for new rims...

valpac

iTrader: (2)

Just replaced my tires. This is my second set of Kuhmo MX's. Love 'em. Got 20k miles on the first set including one track weekend, multiple mountain runs and very spirited driving overall. When they got low on tread, they are not very good in the rain (hard rain, standing water), otherwise, they are great.

Astral

How did you find 245/40/18 T1-Rs on stock rims versus the stock Bridgestones (or Dunlops)? How did the turn-in change from stock to the T1-Rs on stock rims?

Is the only hydroplane resistance better, or is the wet grip better on the T1-R?

I was considering Falken RT-615's in 245/40/18 over stock rims (street use), but if T1-R has better wet performance, that's more attractive (plus longer wear)

ac3mastuh

iTrader: (1)

The T1R is a very responsive tire in comparison to the stockers. I use 225/45 but I can still feel an incredible difference in wet traction compared to the bridgestones.

PoLaK

iTrader: (1)

I suggest GoodYear Eagle F1 GSD3s if you want a streetable tire thats going to last a while with very competitve preformance, RT-615 if you want near the best performance and can afford a new set every 20,000, and the Advan Neova or BridgeStone Re01r if you have the money and can drive the car at the peek of performance (i.e. track)

TeamRX8

iTrader: (25)

finally, somebody on here has a clue ...

PoLaK

iTrader: (1)

EDIT: I see a double
I haven't tried a set of KDW2s yet, if your set is still for sale i'll probably buy them for a new set of street wheels i'll be getting, however I am little leary about having to run low 40's in the psi dept. just to keep the sidewalls stiff.

SRT4 guys hate them (OE equipment) which makes me leary as well, but then again those tirerack groupies just replace them with KDs which aren't great from what I've heard/read.

On the other hand, GSD3s have an extremely stiff sidewall, which I enjoy, additionally I can hang with the guys on Hankook RS2s and venture to say even guys on RT-615s.