OFFICIAL: Enkei RPF1 Wheel Thread - Page 23 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

kch · 08-12-2016, 01:56 PM

Quote:

Originally Posted by racecarshots

I haven't weighed the wheel and tire, but the wheels are I think 4+lbs lighter than stock so the wheels shouldn't cause anything to be sluggish. The PSS 245's are probably heavier than stock tires though, not sure by how much though.

I meant from the extra rolling resistance of a 245 or 255 tire vs stock 215.

Psilox · 08-12-2016, 01:59 PM

Quote:

Originally Posted by kch

I meant from the extra rolling resistance of a 245 or 255 tire vs stock 215.

I see, that's very interesting. For daily driving maybe it would be better to go with a 17x8 and maybe 225/235s?

Sent from my potato

Blucifer · 08-16-2016, 05:55 PM

Quote:

Originally Posted by broseph76

17 x 9 +35 with 225/45/17 on stock suspension.

Anyone know how big a tire you can go on these with stock set up? I'd like a little more tire but don't want mess with suspension. It's a nice daily driver.

Im on 255/40/17 no issues.

racecarshots · 08-17-2016, 01:13 PM

Quote:

Originally Posted by kch

I meant from the extra rolling resistance of a 245 or 255 tire vs stock 215.

Ahh, yeah, well you get that even if you go 215 and a tire that has grip haha. But yeah I am sure my 245 PSS have a shit ton more rolling resistance than my 215 Eco tires did =)

Joe-G · 08-24-2016, 01:50 AM

- 17x8 +45 Enkei RPF1 (12mm spacer in front)
- 245/40/17 Nitto Invo
- TRD Lowering Spring
- -2.2* Front Camber and -1.8* Rear Camber

BurnetRhoades · 08-25-2016, 02:12 PM

Quote:

Originally Posted by racecarshots

I haven't weighed the wheel and tire, but the wheels are I think 4+lbs lighter than stock so the wheels shouldn't cause anything to be sluggish. The PSS 245's are probably heavier than stock tires though, not sure by how much though.

I believe they're about a pound heavier than stock, at the size that puts final diameter about equal with stock. Besides rolling resistance, the weight at the outer edge of the tire is essentially cubed, relative to the stock tire. This translates into more force needed to turn the wheel even if it weren't in contact with the ground.

Acceleration will be effected. If you've done bolt-ons you might be at a wash or maybe still slightly ahead, relative to a stock car, after moving up to either a larger wheel or wider tire.

Basically, without mods to get significantly more power out of the car a stock car with a better than stock tire, but in the same size as stock, will likely both out accelerate in a straight line and get a faster lap time at a twisty track or auto-x than a car with a wider 17" rim (even if it's lighter than stock), and wider 17" tire, or 18" rim if the tire is also wider than stock.

Those skinny TRD or STI forged rims are likely performance upgrades even on the stock car because despite being 18" they're lighter and the tire is likely lighter than stock as well, by virtue of having shorter sidewall and no significant increase in rubber width for the same diameter, if that makes sense.

DocWalt · 08-25-2016, 02:58 PM

Versus stock tires, my car was ~5-10 mph faster exiting "Big Bend" (onto the longest straight at Shenandoah Circuit @ Summit Point) with 245 RE-71Rs but was only ~1mph faster at the end of the straight, plus I was braking ~50 feet later... It's a short straight too, right around 1/4 mile from corner exit to braking zone.

I'd say the wider rubber makes a VERY noticeable difference.

churchx · 08-25-2016, 03:59 PM

Versus stock sized RE-71Rs or versus stock Primacies? There is BIG difference, to reason with just tire width.

DocWalt · 08-25-2016, 07:41 PM

Quote:

Originally Posted by churchx

Versus stock sized RE-71Rs or versus stock Primacies? There is BIG difference, to reason with just tire width.

stock sized Primacies... My point was that the wider/stickier rubber KILLS acceleration/top speed.

I see why Mike says 225s are the way to go.

gt86fan · 08-28-2016, 04:06 PM

Quote:

Originally Posted by NoCones

17x9 gunmetal, 45 offset with 245/40R17 Bridgestone RE-71R's:

Do you have any issues with the +45 offset? does it fit for stock? do you have to use spacers?

NoCones · 08-29-2016, 05:27 PM

Quote:

Originally Posted by gt86fan

Do you have any issues with the +45 offset? does it fit for stock? do you have to use spacers?

I am using a 5mm spacer up front...and my car is not stock. The offset/spacer choice is based on the recommendation of the previous owner...I think the front wheel was contacting the swaybar or some other suspension component at full lock without the spacer in there.

pcuerpo · 09-04-2016, 10:30 PM

18x8 +35 up front and 18x9.5 +38 at the back

BlaineWasHere · 09-05-2016, 11:14 AM

Quote:

Originally Posted by pcuerpo

18x8 +35 up front and 18x9.5 +38 at the back

What's up with the MASSIVE stagger??? That's gonna make your car handle like shit!

Sent from my iPad using Tapatalk

churchx · 09-05-2016, 01:18 PM

It doesn't matter to those that choose staggered.

08-24-2016, 01:50 AM	#313
Joe-G Canada Eh! Join Date: Nov 2013 Drives: '13 FRS Location: Calgary, AB Posts: 447 Thanks: 156 Thanked 231 Times in 120 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	- 17x8 +45 Enkei RPF1 (12mm spacer in front) - 245/40/17 Nitto Invo - TRD Lowering Spring - -2.2* Front Camber and -1.8* Rear Camber __________________ Last edited by Joe-G; 08-24-2016 at 02:01 AM.

08-25-2016, 02:58 PM	#315
DocWalt Senior Member Join Date: Oct 2013 Drives: '22 BRZ Location: PA Posts: 1,948 Thanks: 2,428 Thanked 1,672 Times in 844 Posts Mentioned: 25 Post(s) Tagged: 2 Thread(s)	Versus stock tires, my car was ~5-10 mph faster exiting "Big Bend" (onto the longest straight at Shenandoah Circuit @ Summit Point) with 245 RE-71Rs but was only ~1mph faster at the end of the straight, plus I was braking ~50 feet later... It's a short straight too, right around 1/4 mile from corner exit to braking zone. I'd say the wider rubber makes a VERY noticeable difference. __________________ - Ken. H DocWalt's WRB 2013 BRZ Build Thread \| DocWalt's 2022 WRB BRZ Build Thread

09-04-2016, 10:30 PM	#320
pcuerpo Senior Member Join Date: Jun 2013 Drives: Toyota 86 Location: Philippines Posts: 334 Thanks: 278 Thanked 228 Times in 100 Posts Mentioned: 27 Post(s) Tagged: 0 Thread(s)	18x8 +35 up front and 18x9.5 +38 at the back __________________ 2013 Toyota 86 Sterling Silver Metallic IG: @pcuerpo.images

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