All,

I am picking out tire sizes right now. I'm have to options. I'm going with Falken RT-615s.

Rear is going to be a 275/40/17 (25.6" diameter)in both options.

Front is either a 245/45/17 (25.6" diameter, perfect match)
or
255/40/17 (25.0" diameter)

The pros of the 255 front is more grip, and a smaller diameter. So less rubbage, or more clearance, however you want to look at it.

Potential cons of hte 255 is that there will be a difference in diameter, causing the front and rear to be rotating at different speeds. This could possible cause a problem with the ABS system.

Will a difference of 0.6" on the diameter cause the ABS to not function properly?

Thanks,
Kevin

 

No. Perhaps it wouldn't be 100% optimal, but the increased tire grip over stock tires would more than offset any slight penalty. You do NOT want to run a tire that tall up front (25.6"), unless you like replacing fender liners and wiring harnesses.

 

Thanks for the reply.

So you'd recommend the 255/275 combo I listed?

Or is there another tire manufacture that makes a comprable tire in different sizes that you'd recommend?

 

the size you are mentioning really is 275/35/18

 

The size you are mentioning really is 275/35/18, I have been looking at the same tire combo

 

No, I'm looking at the 17" sizes.

 

****, didn't notice that.....stupid me I have to learn to read!!

 

The reasons I'm looking at the 17s as opposed to 18s are:

1. Wheels are cheaper.
2. Tires are cheaper.
3. Wheels and tires are lighter.
4. Roads in Cincinnati suck, and I'd likely kill the wheels with potholes if I had 18s.

 

Well, you didn't list the wheel size/offsets you are running. The 255/275 is fine. A lot of people also run the 245/40 and 265/40 combo. The RT-615s are super grippy tires, pretty much anything else is going to sacrifice dry grip for better longevity and/or wet weather handling. I'm looking at the RT-615s for the Bridgestone 01Rs for my next set.

 

I've had RT-615s on another car, and I love the tires. they were 225s on an AWD talon, so traction wasn't a problem.

I'm going with Enkei RPF1s

From Richie if he has any left.
17x9 +45 front.
17x9.5 +38 rear.

I need as much tire as I can get. I have quite the potent motor in the car. LS1 swap with a rowdy cam.

 

I heard those tires are **** in the rain, care to comment? I want to buy a set but just want some real world experience or opinion from people who have used them.

 

Acutally, from my experience, the tires are pretty damn good in the rain. Most other UHP or Max preformance tires I've used have horrible wet traction. I was surprised how well they gripped in the wet. I never had any hyrdoplane problems, or anything weird like that. Other passengers in my car have also commented how grippy they are in the rain.

 

Cool, thanks.....sorry for getting off topic but I needed to know.

 

kevin, if this was a track only setup, i'd run the 17x9 +45 all around; then you can use 275's all around.

I also run 255-40-17 front and 275-40-17 615's.
no issues found yet but i haven't put too many miles on them yet, and my car isn't too low.
these are my street tires, but will also be used on the track if it rains.
http://209.177.55.37/tires.htm

 

I just ordered this setup:

RPF1s with RT-615s
17x9.0 +45 255/40/17
17x9.5 +38 275/40/17

My car will see primarily street duty.

 

nice selection. i want a set of RPF1's eventually.

 

KevinDoe:

You're going to LOVE that combo for your use... nice choice.