Car feels "sluggish" and less nimble with new rims/tires - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

autograph · 04-02-2015, 11:25 PM

Hi guys. I recently purchased a set of RPF1 17x9 wheels (+45) and Bridgestone RE-11's (235/40/17). Although I love the extra grip, I can't help feeling the car feels a lot less nimble. I came from using snow tires on the stock wheels, and the snow tires were around 23 lbs.

The RE-11's are 25 lbs. The 40 aspect ratio also means a slightly smaller diameter. And of course I dropped ~4.x lbs from the stock wheels. Despite this, the car feels much more sluggish and not nearly as "nimble". Slow speeds in first gear seem to bog it down and launching seems to take a little more gas.

Is this the effect of increased grip that I am feeling? Or is it the 25 lb tires and the weight being more towards the outside that I am feeling? Car feels like it has more "rolling resistance" also, if you know what I mean. Not very experienced with changing out tire setups.

Thanks for your input

wparsons · 04-02-2015, 11:45 PM

Wider, stickier, tires will definitely have more rolling resistance, but I would also bet some of it is placebo. Are the tire pressures good?

Vracer111 · 04-03-2015, 01:29 AM

1. You have a noticeably higher MOI (moment of inertia) with the 25lb and very grippy compound tires.

2. The 1" wider contact patch on a wider track is trading agility for stability when it comes to transitional handling, so the car will be less willing to change direction as quickly.

JS + BRZ · 04-03-2015, 01:34 PM

Had the same feeling on the first day.. trust me you will love the new set up.

cdrazic93 · 04-03-2015, 02:47 PM

Well. You know what this means? New coilovers.

autograph · 04-04-2015, 01:09 AM

tire pressure is at 32 psi. lolll.. oh boy.. coilovers. might as well lmao. and im about to supercharge too.. bye bye paychecks

Ultramaroon · 04-04-2015, 01:22 AM

cdrazic93 · 04-04-2015, 02:40 AM

Quote:

Originally Posted by autograph

tire pressure is at 32 psi. lolll.. oh boy.. coilovers. might as well lmao. and im about to supercharge too.. bye bye paychecks

Please get good ones, I see too many people compromising for cost. Just wait for the right set, and save save save. If you don't 110% like it, don't buy it. Get rides, do research. Good luck.

Higher Being · 04-04-2015, 02:57 AM

Try raising your tire psi, dont get too crazy, check out the max psi on the side wall of the tire. But i run a higher psi tire when its nice and dry, its a slight change, but you can "tune out" some of the excessive grippyness.

Kostamojen · 04-04-2015, 03:38 AM

Give it two weeks and you will forget how it drove before.

That being said, I went from huge heavy wheels to much much lighter than stock wheels/tires because of such things.

longhornjoe · 04-04-2015, 08:38 AM

I noticed the same after upgrading to my lighter O. Z. 17x8 wheels and Michelin Pilot Sport AS/3 225s.

Installing a Perrin steering rack lockdown seemed to offset a lot of the sluggishness.

http://perrinperformance.com/i-15768...-fr-s-brz.html

04-02-2015, 11:25 PM	#1
autograph Senior Member Join Date: Dec 2014 Drives: 6MT Hot Lava Location: New Jersey Posts: 123 Thanks: 72 Thanked 41 Times in 20 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Car feels "sluggish" and less nimble with new rims/tires Hi guys. I recently purchased a set of RPF1 17x9 wheels (+45) and Bridgestone RE-11's (235/40/17). Although I love the extra grip, I can't help feeling the car feels a lot less nimble. I came from using snow tires on the stock wheels, and the snow tires were around 23 lbs. The RE-11's are 25 lbs. The 40 aspect ratio also means a slightly smaller diameter. And of course I dropped ~4.x lbs from the stock wheels. Despite this, the car feels much more sluggish and not nearly as "nimble". Slow speeds in first gear seem to bog it down and launching seems to take a little more gas. Is this the effect of increased grip that I am feeling? Or is it the 25 lb tires and the weight being more towards the outside that I am feeling? Car feels like it has more "rolling resistance" also, if you know what I mean. Not very experienced with changing out tire setups. Thanks for your input

04-03-2015, 02:47 PM	#5
cdrazic93 Junior Join Date: Aug 2013 Drives: a car Location: Probably at school Posts: 4,341 Thanks: 3,184 Thanked 2,512 Times in 1,502 Posts Mentioned: 20 Post(s) Tagged: 0 Thread(s)	Well. You know what this means? New coilovers. __________________ "Ah! What music! They could have never imagined, those pioneers who invented the automobile, that it would posses us like this, our imaginations, our dreams. Men love women, but even more than that, men love CARS!"-Lord Hesketh

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04-03-2015, 01:34 PM	#4
JS + BRZ Banned Join Date: Dec 2013 Drives: 2010 MS3 Location: Los Angeles Posts: 1,820 Thanks: 1,180 Thanked 1,161 Times in 597 Posts Mentioned: 18 Post(s) Tagged: 0 Thread(s)	Had the same feeling on the first day.. trust me you will love the new set up.

04-04-2015, 01:09 AM	#6
autograph Senior Member Join Date: Dec 2014 Drives: 6MT Hot Lava Location: New Jersey Posts: 123 Thanks: 72 Thanked 41 Times in 20 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	tire pressure is at 32 psi. lolll.. oh boy.. coilovers. might as well lmao. and im about to supercharge too.. bye bye paychecks

04-04-2015, 01:22 AM	#7
Ultramaroon not playing cards Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 32,396 Thanks: 53,053 Thanked 37,225 Times in 19,308 Posts Mentioned: 1117 Post(s) Tagged: 9 Thread(s)

04-04-2015, 02:57 AM	#9
Higher Being Senior Member Join Date: Mar 2014 Drives: 2014 Asphalt Grey FRS Location: Houston Posts: 135 Thanks: 22 Thanked 44 Times in 32 Posts Mentioned: 1 Post(s) Tagged: 2 Thread(s)	Try raising your tire psi, dont get too crazy, check out the max psi on the side wall of the tire. But i run a higher psi tire when its nice and dry, its a slight change, but you can "tune out" some of the excessive grippyness.

04-04-2015, 03:38 AM	#10
Kostamojen Senior Member Join Date: Oct 2011 Drives: 1993 Impreza w/ WRX Swap + FWD! Location: Roseville, CA Posts: 2,071 Thanks: 217 Thanked 952 Times in 500 Posts Mentioned: 31 Post(s) Tagged: 0 Thread(s)	Give it two weeks and you will forget how it drove before. That being said, I went from huge heavy wheels to much much lighter than stock wheels/tires because of such things.

04-04-2015, 08:38 AM	#11
longhornjoe Member Join Date: Nov 2013 Drives: '13 Raven FR-S Location: Fort Worth, TX Posts: 25 Thanks: 18 Thanked 16 Times in 12 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I noticed the same after upgrading to my lighter O. Z. 17x8 wheels and Michelin Pilot Sport AS/3 225s. Installing a Perrin steering rack lockdown seemed to offset a lot of the sluggishness. http://perrinperformance.com/i-15768...-fr-s-brz.html

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