Bridgestone Potenza RE-71R 305/30R-19 (new size) Discussion Thread - Page 3 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

RKeeton · 08-20-2016, 03:37 PM

Thanks, I hope to bring a set to Solo Nationals. Nothing like a new setup at Lincoln.

L99CAMA2011 · 08-20-2016, 03:50 PM

Quote:

Originally Posted by nilfinite

SCCA rules force people to do not-optimal things! Can't change wheel width per the rules. Only 1" decrease in wheel diameter and push the wheels 7mm out with offset.

Luckily the RE-71R has a super stiff sidewall. It'll handle being pinched on a wheel much better than most.

A decent comp is what the guys in 2016 Camaros are doing. They are running 275/35/19 RE-71R on 19x8.5 front and 19x9.5 rear.

Great for them. 275-35-19 on the back of my car = major trouble or drive like grandma. On another note my 19x9.5" wheels at 22lbs = a killer autocross car.

SS_TINHO · 08-20-2016, 04:14 PM

Received my tires earlier this week. Really looking forward to see how they perform in the next autocross in September.

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fzss · 08-21-2016, 07:19 PM

Quote:

Originally Posted by SS_TINHO

Received my tires earlier this week. Really looking forward to see how they perform in the next autocross in September.

Sent from my iPhone using Tapatalk

Looking good. What's your wheel setup?

SS_TINHO · 08-21-2016, 07:30 PM

I got a new 19" Setup just for these tires. 19x10 19x11 285 up front 305 rear.

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JusticePete · 08-22-2016, 03:19 PM

Quote:

Originally Posted by SS_TINHO

I got a new 19" Setup just for these tires. 19x10 19x11 285 up front 305 rear.

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Why not square?

fzss · 08-22-2016, 03:48 PM

Quote:

Originally Posted by JusticePete

Why not square?

JusticePete, what is your opinion on running a 305/30 on a 10" wide wheel (for autocross/road course purposes)? Too wide? Just right?

JusticePete · 08-22-2016, 03:58 PM

Quote:

Originally Posted by fzss

JusticePete, what is your opinion on running a 305/30 on a 10" wide wheel (for autocross/road course purposes)? Too wide? Just right?

They show a 10.5 minimum rim width for the 305/30/19 RE-11. I would think that would be the same for the RE-71. Better to drop down a size and have a tighter fitting tire than a sloppy larger tire.

Cornercarver · 08-22-2016, 04:09 PM

Quote:

Originally Posted by JusticePete

They show a 10.5 minimum rim width for the 305/30/19 RE-11. I would think that would be the same for the RE-71. Better to drop down a size and have a tighter fitting tire than a sloppy larger tire.

This^^^ I would much rather have crisp turn in than a wider tire. The grip is close enough with those sizes that the slow responsiveness will be the determining factor. That's my opinion, and I have run pinched tires a lot. 305 on a 10" zl1 wheel, very unresponsive turn in.

fzss · 08-22-2016, 04:14 PM

Quote:

Originally Posted by JusticePete

They show a 10.5 minimum rim width for the 305/30/19 RE-11. I would think that would be the same for the RE-71. Better to drop down a size and have a tighter fitting tire than a sloppy larger tire.

Quote:

Originally Posted by Cornercarver

This^^^ I would much rather have crisp turn in than a wider tire. The grip is close enough with those sizes that the slow responsiveness will be the determining factor. That's my opinion, and I have run pinched tires a lot. 305 on a 10" zl1 wheel, very unresponsive turn in.

In an autocross setting, if you were restricted to 10" front 11" rear wheels, would it be better to run a square 305/30R-19 and have unresponsive turn in, or 285/35R-19 front 305/30R-19 rear and have similar issues with understeer?

Asking for a friend.

Cornercarver · 08-22-2016, 04:16 PM

Square is best. But you can tune out most of the understeer of a staggered setup with more rear sway bar, or so I've heard. To be honest a 285 square setup would probably be best of both worlds

fzss · 08-22-2016, 04:56 PM

Quote:

Originally Posted by Cornercarver

Square is best. But you can tune out most of the understeer of a staggered setup with more rear sway bar, or so I've heard. To be honest a 285 square setup would probably be best of both worlds

285 square RE-71Rs is the setup that I've been running for this entire season, but it's very stretched on the 11" wheels (although within spec). The rear end feels VERY loose, I'm constantly fighting that oversteer.

decisions, decisions...

Cornercarver · 08-22-2016, 05:29 PM

Quote:

Originally Posted by fzss

285 square RE-71Rs is the setup that I've been running for this entire season, but it's very stretched on the 11" wheels (although within spec). The rear end feels VERY loose, I'm constantly fighting that oversteer.

decisions, decisions...

What tire pressures? I would think you could play with your pressure to get some grip back in the rear. A car that rotates is almost always faster

fzss · 08-22-2016, 05:41 PM

Quote:

Originally Posted by Cornercarver

What tire pressures? I would think you could play with your pressure to get some grip back in the rear. A car that rotates is almost always faster

Yeah, that's what I've had to do. I run the rears really low, usually at around 30psi. Fronts at around 31psi.

08-20-2016, 04:14 PM	#31
SS_TINHO Drives: 2010 Camaro SS Join Date: May 2010 Location: Torrance, CA Posts: 824 View My Garage	Received my tires earlier this week. Really looking forward to see how they perform in the next autocross in September. Sent from my iPhone using Tapatalk __________________ 13' Camaro SS 746WHP LSA Supercharged, Built 416 Stroker, BTR Stage III Pd cam, M6, Corsa Exhaust, DMH Cutouts, Vip Modular Wheels, DSE Suspension, Squash Fuel System.

08-21-2016, 07:30 PM	#33
SS_TINHO Drives: 2010 Camaro SS Join Date: May 2010 Location: Torrance, CA Posts: 824 View My Garage	I got a new 19" Setup just for these tires. 19x10 19x11 285 up front 305 rear. Sent from my iPhone using Tapatalk __________________ 13' Camaro SS 746WHP LSA Supercharged, Built 416 Stroker, BTR Stage III Pd cam, M6, Corsa Exhaust, DMH Cutouts, Vip Modular Wheels, DSE Suspension, Squash Fuel System.

08-20-2016, 03:37 PM	#29
RKeeton Drives: 2013 BMW M3 Join Date: Jul 2016 Location: Tulsa,OK Posts: 120	Thanks, I hope to bring a set to Solo Nationals. Nothing like a new setup at Lincoln.

08-22-2016, 04:16 PM	#39
Cornercarver Account Suspended Drives: 2011 2SS/RS M6 Join Date: Feb 2015 Location: Kansas City Posts: 83 View My Garage	Square is best. But you can tune out most of the understeer of a staggered setup with more rear sway bar, or so I've heard. To be honest a 285 square setup would probably be best of both worlds