Replacing tires 2 questions
Thread Starter
Safety Car
Joined: May 2011
Posts: 3,582
Likes: 46
From: va
Replacing tires 2 questions
Well the time has come to replace my tires.
Background:
Im currently on stock wheels but intend to do a z06 brake upgrade (could be several months to a year though) and I will be going to ace slicks which are 11" in the rear.
Im trying to decided whether to run the stock sizing or the 265 & 305 with my stock wheels.
The rear stock rim is 10" and the manufacturer's rec is 10.5" min
How many people that compete on track have gotten away with running the rear 305 with stock rims? I know its works for some on slow street driving, but Im concerned about high speed cornering at higher g-force loads.
Also Im down to two choices the toyo R888 or bridgestone RE-11. The main factor is temperature - will either of these be better in dry 30 to 40 degree weather?
Thanks!
Background:
Im currently on stock wheels but intend to do a z06 brake upgrade (could be several months to a year though) and I will be going to ace slicks which are 11" in the rear.
Im trying to decided whether to run the stock sizing or the 265 & 305 with my stock wheels.
The rear stock rim is 10" and the manufacturer's rec is 10.5" min
How many people that compete on track have gotten away with running the rear 305 with stock rims? I know its works for some on slow street driving, but Im concerned about high speed cornering at higher g-force loads.
Also Im down to two choices the toyo R888 or bridgestone RE-11. The main factor is temperature - will either of these be better in dry 30 to 40 degree weather?
Thanks!
Last edited by el es tu; Sep 27, 2011 at 08:25 AM.
Safety Car
Joined: Nov 2007
Posts: 4,537
Likes: 1,403
From: Bethesda MD
I see lots of people putting the 305s on stock rims, but I'd use wider rims for as hard as you push the car. I question whether you get the maximum benefit from the size when you go outside the min/max recommendations.
I used 555DRs on my Camaro which are same basic compound as the R888 and they were like driving on rocks when the temps dropped to 40* and below. They'll warm up a bit if you keep the pressure low, but that compromises handling which wasn't my main concern on my Camaro.
I used 555DRs on my Camaro which are same basic compound as the R888 and they were like driving on rocks when the temps dropped to 40* and below. They'll warm up a bit if you keep the pressure low, but that compromises handling which wasn't my main concern on my Camaro.
Thread Starter
Safety Car
Joined: May 2011
Posts: 3,582
Likes: 46
From: va
I see lots of people putting the 305s on stock rims, but I'd use wider rims for as hard as you push the car. I question whether you get the maximum benefit from the size when you go outside the min/max recommendations.
I used 555DRs on my Camaro which are same basic compound as the R888 and they were like driving on rocks when the temps dropped to 40* and below. They'll warm up a bit if you keep the pressure low, but that compromises handling which wasn't my main concern on my Camaro.
I used 555DRs on my Camaro which are same basic compound as the R888 and they were like driving on rocks when the temps dropped to 40* and below. They'll warm up a bit if you keep the pressure low, but that compromises handling which wasn't my main concern on my Camaro.
Id rather not waste money on stock size tires only to end up a year later running larger wheels to clear bigger brakes and then have to buy new tires again... but of course there is that safety issue that I just want to be sure on before making my decision.
From what youve stated and what Ive been researching, it looks like the R888 is out of the picture. I hate to have to run more street oriented tires but because of the cold issues, I might have to use pilot super sports or the re11. Of course if I go stock sizing, the only option is the re11.
Why cant a tire manufacturer just make a tarmac rally compound in larger sizes!!!
We'd have nice grip even in colder weather.
Man I hate having to plan one thing that depends on another!...
Last edited by el es tu; Sep 27, 2011 at 11:15 AM.
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
Run 265/305 Hankook Ventus V12s.
Fantastic Combo and unbeatable price. I had that setup on my vette before swapping to 345's out back and currently have 245/275 V12s on my XLR-V.
I love that tire.
Fantastic Combo and unbeatable price. I had that setup on my vette before swapping to 345's out back and currently have 245/275 V12s on my XLR-V.
I love that tire.
Thread Starter
Safety Car
Joined: May 2011
Posts: 3,582
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From: va
How many lateral Gs have you been able to push them on your car?
Im aiming for the 1.2 to 1.5 range...
Race Director
Joined: Apr 2005
Posts: 10,436
Likes: 4
From: Everett Wa
The price is great, but Im very hesitant about the performance of the tires (the tests Ive seen put them in the PS2 performance range which is a little more slow/street oriented than Im looking for).
How many lateral Gs have you been able to push them on your car?
Im aiming for the 1.2 to 1.5 range...
How many lateral Gs have you been able to push them on your car?
Im aiming for the 1.2 to 1.5 range...
Thread Starter
Safety Car
Joined: May 2011
Posts: 3,582
Likes: 46
From: va
You are not going to get that type of lateral G's with suspension work and R-compound tires. I have not really kept records but I have seen 1.2 sustained G's with my R888's on a warm day at PIR. Mods include larger sways, poly bushings, max camber and upsizing the tires on stock rims. 245 front and 295 rear. You will not see that on any street tire. And RE11's won't be that good once the temps start to fall. My Kuhmo XS tires where skate boards at temps below 40.
It sucks but whatever I end up having to go with will end up being a compromise in some way.
What Id like to find is a soft compund that doesnt crack in the cold (I dont need a winter tire, - no snow to deal with, just the low temp) and gets to operating temp faster than its competitors.
Im considering poly to replace all the rubber or going the spherical bearing route. How long/how much labor did it take to get your poly bushings installed?
Thanks!
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
The price is great, but Im very hesitant about the performance of the tires (the tests Ive seen put them in the PS2 performance range which is a little more slow/street oriented than Im looking for).
How many lateral Gs have you been able to push them on your car?
Im aiming for the 1.2 to 1.5 range...
How many lateral Gs have you been able to push them on your car?
Im aiming for the 1.2 to 1.5 range...
The performance of the V12 is excellent for a street tire. I prefer it over the PS2, which is also an amazing street tire. If you want SUPERIOR dry performance get the Khumo XS. It is the stickiest true street tire (other than the Pilot Sport Cup, which I wouldn't personally run on anything but a track car). My 345/30/19 XS stick like glue even with a stalled auto.
Last edited by FloydSummerOf68; Sep 28, 2011 at 08:31 AM.
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Race Director
Joined: Apr 2005
Posts: 10,436
Likes: 4
From: Everett Wa
Ive seen the same thing posted about the kumhos before. Also many were ranting that they suck in the rain (I avoid driving in the rain, but I like to stay on the safe side), so I immediately cut them from my options when I was searching.
It sucks but whatever I end up having to go with will end up being a compromise in some way.
What Id like to find is a soft compund that doesnt crack in the cold (I dont need a winter tire, - no snow to deal with, just the low temp) and gets to operating temp faster than its competitors.
Im considering poly to replace all the rubber or going the spherical bearing route. How long/how much labor did it take to get your poly bushings installed?
Thanks!
It sucks but whatever I end up having to go with will end up being a compromise in some way.
What Id like to find is a soft compund that doesnt crack in the cold (I dont need a winter tire, - no snow to deal with, just the low temp) and gets to operating temp faster than its competitors.
Im considering poly to replace all the rubber or going the spherical bearing route. How long/how much labor did it take to get your poly bushings installed?
Thanks!
Heel & Toe
Joined: Aug 2011
Posts: 19
Likes: 0
From: NJ
I'm having the Ace slick wheels 18x9.5F, 19x11R with the Bridgestone Potenza RE-11 265/35R-18F, 305/30R-19R mounted and balanced next weekend. I can let you know what I think. Unfortunetly I don't track the car or have experience in that department. (hoping to get experience soon)
el es tu, thanks for the past recommendations (ZR1 front Z06 rear sway bars and Bilstein shocks) the combo is working great.
el es tu, thanks for the past recommendations (ZR1 front Z06 rear sway bars and Bilstein shocks) the combo is working great.
Thread Starter
Safety Car
Joined: May 2011
Posts: 3,582
Likes: 46
From: va
I'm having the Ace slick wheels 18x9.5F, 19x11R with the Bridgestone Potenza RE-11 265/35R-18F, 305/30R-19R mounted and balanced next weekend. I can let you know what I think. Unfortunetly I don't track the car or have experience in that department. (hoping to get experience soon)
el es tu, thanks for the past recommendations (ZR1 front Z06 rear sway bars and Bilstein shocks) the combo is working great.
el es tu, thanks for the past recommendations (ZR1 front Z06 rear sway bars and Bilstein shocks) the combo is working great.
Last edited by el es tu; Oct 3, 2011 at 07:59 AM.
Heel & Toe
Joined: Aug 2011
Posts: 19
Likes: 0
From: NJ
The wheel and tire setup (Ace slick wheels 18x9.5F, 19x11R with the Bridgestone Potenza RE-11 265/35R-18F, 305/30R-19R) is working great. These tires have a very good grip on the road, I would imagine in the summer they are even better. The ACE Slicks look great I got chrome. I am very happy with the decision.
Racer
Joined: Oct 2006
Posts: 393
Likes: 11
From: Toronto Ontario
I have a set of RE-11's, 265/305 mounted on stock 2008 split spoke rims. I have done 10 track days on them and approx 8,000 miles. They look like they could do another 5,000 miles but are getting a little hard for track work (too many heat cycles). Suspension mods are LG G2 coilovers and G1 bars, pfadt poly bushings and semi-agressive alignment. Have run them hard at Watkins Glen and Mosport.
Here's a pic from the Glen in May (this was before the coilovers and new bars but with the pfadt poly bushings and stock z51 suspension). As you can see from the photo, there is no bulging.
The RE-11's are great in both dry and wet. Kumho's XS would be equivalent in dry and not as good in wet. I would like to try the Hankook RS-3's as they are supposed to be the fastest non-R compound. Don't know how they are in the wet.
As good as the RE-11's are, they are nowhere near as fast as Hoosier R or A's on a warm track.
Here's a pic from the Glen in May (this was before the coilovers and new bars but with the pfadt poly bushings and stock z51 suspension). As you can see from the photo, there is no bulging.
The RE-11's are great in both dry and wet. Kumho's XS would be equivalent in dry and not as good in wet. I would like to try the Hankook RS-3's as they are supposed to be the fastest non-R compound. Don't know how they are in the wet.
As good as the RE-11's are, they are nowhere near as fast as Hoosier R or A's on a warm track.
Pro
Joined: Aug 2007
Posts: 562
Likes: 2
From: Jacksonville FL
I am running 265s and 305s on stock size wheels. Over 30 track days and no issues at all. I have one set of RE11s and another set of Michelin PS2s. The Michelins are REALLY wide. The rears are about 1/2 an inch wider then my RE11s
Thread Starter
Safety Car
Joined: May 2011
Posts: 3,582
Likes: 46
From: va
whats the highest speed you all have run the 265/305 combos to (with the electronic controls still on)?
btw dont post details of where - I dont believe in judging people on that, but someone else likely will.
btw dont post details of where - I dont believe in judging people on that, but someone else likely will.
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
I've always heard that the Khumos XS was the better in dry but worse in wet than the RE-11 and that the RS-3 didn't perform as well as it was expected to.
You're saying 100% opposite of what I've read in research and been told from the guys at Tire Rack.
Where are you pulling that info?
Safety Car
Joined: Dec 2009
Posts: 3,724
Likes: 9
As far as the cost of the poly kit goes, it's pretty reasonable. If you're paying someone else to do the labor it will probably take about 6-8 hours the first time they do the install. Every control arm needs to come off the car, the bushings pressed out, and new parts installed. If you're doing it yourself and take your time it's probably a weekend project.
Pro
Joined: Apr 2011
Posts: 568
Likes: 4
From: Cambridge
Q for the guys running 265/305 please.
What aspect ratio in these widths are you running? Does this maintain stock rolling radius front/back and do you get any rubbing at all?
Very interested in the Hankook set up on my car but it is a DD.
Thanks and sorry for slight hijack!
What aspect ratio in these widths are you running? Does this maintain stock rolling radius front/back and do you get any rubbing at all?
Very interested in the Hankook set up on my car but it is a DD.
Thanks and sorry for slight hijack!
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
There's no rubbing with a 265/305 combo
I think it's a 265/35/18 and 305/30/19
Someone can correct me if I'm wrong. It's a fantastic setup for a daily driver (the Hankooks, that is)
I think it's a 265/35/18 and 305/30/19
Someone can correct me if I'm wrong. It's a fantastic setup for a daily driver (the Hankooks, that is)