RE71R on ZCP 666M

[rcrs2]

Just got new RE71R

So far, not too loud, maybe even better road manners and better traction than stock PSS. And looks nicer...


245/35 - 20 Fronts
295/30 - 20 Rears

[CanAutM3]

This is way too much stagger difference. It must be understeering like hell

[ellipsis212]

Originally Posted by CanAutM3

This is way too much stagger difference. It must be understeering like hell

Probably not noticeable under normal driving conditions.

[Greg FEightytwo]

Re71r runs wide because it has a stiffer sidewall. totally acceptable. These are my favorite tires.. I have gts fitment 20/19 295/30/20 and 265/35/19 on my firs. I've had 4 or 5 sets now.

your fitment is actually ran on the cayman gt4 Porsches. i used to have 20/20 firs and when i sold the tires it went to a guy with a gt4 in texas. same specs.

[rcrs2]

Actually the 245 RE71 has wider contact patch than the star BMW 265/30 PSS. Both front and rear contact patch went up about an inch per tire, so it's actually pretty balanced.

[MPoweRo]

The both seem to sit pretty square on the wheel.

If the tread width did indeed go up equally at the front and rear, then that would actually be a greater % increase favouring the front, decreasing the stagger. If the provided specs are correct of course.

[rcrs2]

After 1 weekend, I can say the car feels better balanced. More front end feel, a bit quicker steering, more precision and better ride quality over bumps. It is a little louder but doesn't really bother me. The wind noise and radio is louder than the tires. The prodigious grip is night and day over the stock pss. Highly recommended.

[Powerslide]

Originally Posted by rcrs2

Just got new RE71R

So far, not too loud, maybe even better road manners and better traction than stock PSS. And looks nicer...


245/35 - 20 Fronts
295/30 - 20 Rears

I'm thinking about these exact same size tires for my 666M wheels - the diameter of the fronts is 26.8" and 27.0" for rear - which means (per Tire Rack's website) 778 revs per mile for the fronts and 772 revs per mile for rears.

The stock MPSS in 265/30 R20 is 26.3" and 791 revs per mile and rear 285/30 R20 is 26.8" and 777 revs per mile.

Because this setup for the RE-71R has less of a diameter difference and revs per mile difference front to rear as compared to stock MPSS values front to rear - have you noticed any behavioral differences in terms of traction control or other behavior of the car? I like to drive MDM on street and I was worried that less of a diameter differential front to rear might "trick" the traction control into thinking more or different intervention is required - but any anecdotal or scientific answers would be great before I pull the trigger on these...

[NYG]

RE71R and PSS aren't even the same class of tire. It's superior in all facets except wet performance.

[Powerslide]

Originally Posted by NYG

RE71R and PSS aren't even the same class of tire. It's superior in all facets except wet performance.

I definitely agree - when I had the 19" 437M rims I did the RE71R in 255/35 R19 front and 275/35R19 rear for a few sets, then 265/35R19 front and 285/35R19 rear. They performed great on the track all the time - except for the last session of my third track day on the same tires - they started getting pretty greasy and I noticed the back of the car was stepping out more than before. In hindsight - I probably wasn't paying close enough attention to tire pressures and temperatures as the day went on and pressures/temps continued to climb.

Hopefully with better monitoring/adjusting of tire pressures throughout the day this "greasiness" can be avoided with these tires on the track. Either way, subject to other responses I get to this thread and another thread I just started on this topic, I'm willing to give them a try for dual street/track use on my 20" 666M rims...

[tomlong]

Originally Posted by Powerslide

I definitely agree - when I had the 19" 437M rims I did the RE71R in 255/35 R19 front and 275/35R19 rear for a few sets, then 265/35R19 front and 285/35R19 rear. They performed great on the track all the time - except for the last session of my third track day on the same tires - they started getting pretty greasy and I noticed the back of the car was stepping out more than before. In hindsight - I probably wasn't paying close enough attention to tire pressures and temperatures as the day went on and pressures/temps continued to climb.

Hopefully with better monitoring/adjusting of tire pressures throughout the day this "greasiness" can be avoided with these tires on the track. Either way, subject to other responses I get to this thread and another thread I just started on this topic, I'm willing to give them a try for dual street/track use on my 20" 666M rims...

Did you notice significant improvement when you stepped it up from 255 to 265 and 275 to 285?

[jfritz27]

They are awesome when warm and dry, just be sure to respect their limitations when it gets cooler and wetter (particularly as they wear). Would advise keeping all the nannies on too if you're going to run them in those conditions.

[SYT_Shadow]

Good choice, great tire that can do DD or go to the track quite happily

[Powerslide]

Originally Posted by tomlong

Did you notice significant improvement when you stepped it up from 255 to 265 and 275 to 285?

Yes - not a huge difference - but definitely seemed a little better (not sure how much of that is actual vs placebo - but I figured I couldn't go wrong by going up in size if driving on the track).

[calubi]

Any updates after having this setup for about a year now? Any funkiness with MDM or DSC?

I just corded my stock PSS tires and am looking for a new setup. I was thinking about going with a dedicated track wheel + tire and just replacing the PSS tires on my 666M for daily use, but if I can get away with RE71R on the 666M rims, that may be better and cheaper for now. I would need to be able to drive to the track on the tires anyway (no trailer) and the car doesn't see many wet miles in its daily driving life. I'm just worried about heat cycling the tires too many times with small trips or highway drives.

And yes, I know I need to address camber before tracking my next set of tires, no matter the type!

[SYT_Shadow]

Originally Posted by calubi

Any updates after having this setup for about a year now? Any funkiness with MDM or DSC?

I just corded my stock PSS tires and am looking for a new setup. I was thinking about going with a dedicated track wheel + tire and just replacing the PSS tires on my 666M for daily use, but if I can get away with RE71R on the 666M rims, that may be better and cheaper for now. I would need to be able to drive to the track on the tires anyway (no trailer) and the car doesn't see many wet miles in its daily driving life. I'm just worried about heat cycling the tires too many times with small trips or highway drives.

And yes, I know I need to address camber before tracking my next set of tires, no matter the type!

The RE71 is commonly used as 'rain' tires in racing, it works quite well.

You will not heat cycle them on the street.