rpf1 17x7.5 or 17x8

e_presley20 · 08-18-2009, 02:41 PM

I was wondering which wheel would be better over all?
is there a huge difference between 7.5 or 8?

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BIGHONKEY · 08-18-2009, 03:29 PM

About a half inch difference.

e_presley20 · 08-18-2009, 03:39 PM

well i know that, im just saying any noticeable ride quality difference

mosc · 08-18-2009, 03:49 PM

RPF1's don't come in a plethora of sizes for 5x100. I believe 17x8" +45 is your only choice?

nhat · 08-18-2009, 04:01 PM

17x8 +45 or +35. going to an 8" wide wheel allows you to go as wide as 245 while it isn't recommend to go wider than 225 on a 7.5" wheel.

Scooby921 · 08-18-2009, 04:37 PM

Quote:

Originally Posted by mosc

RPF1's don't come in a plethora of sizes for 5x100. I believe 17x8" +45 is your only choice?

I believe the 5x100 comes in a 17x7.5 +48 or 17x8 +48 or +45.

Quote:

Originally Posted by nhat

17x8 +45 or +35. going to an 8" wide wheel allows you to go as wide as 245 while it isn't recommend to go wider than 225 on a 7.5" wheel.

Yes. It would really depend on what size tires you want to use. If you're just daily driving and don't need/want the added performance and grip of a wider tire you can save yourself some money going with a 7.5" wheel and running 225 width tires. If you do go with the 8" wide version I'd get the +45 offset. Its only a 3mm difference, but I know first hand that a 332 stoptech doesn't fit under the +48 but it does fit under the +45. Gives you more options if you want to upgrade brakes at some point...or if you decide to sell them and people want to be sure they clear big brakes.

Uncle Scotty · 08-18-2009, 11:37 PM

a 17x7.5 is useless if you want a 'wide' tire, as the widest tire that fits...is a 235/40

you can put a 245/40 on a 17x8...and a 235/40 is GREAT on a 17x8

Chainsaw_Willie · 08-19-2009, 01:59 AM

I'm running the 215/45s that came with my car on my 17x8 RPF1s until they wear out. Tire Rack even says that's the recommended size for this wheel (though I have no idea why). I see no reason you couldn't run a 225 if you wanted to, it'd be a better fit than the 215s are. When these 215s wear out I'm going either 235 or 245.

jcbluescooby · 08-19-2009, 08:03 AM

Quote:

Originally Posted by Uncle Scotty

a 17x7.5 is useless if you want a 'wide' tire, as the widest tire that fits...is a 235/40

you can put a 245/40 on a 17x8...and a 235/40 is GREAT on a 17x8

why is a 235/40 GREAT?

kaptainkevlar · 08-19-2009, 12:15 PM

Quote:

Originally Posted by jcbluescooby

why is a 235/40 GREAT?

I'd imagine Uncle means that 235/40 will fit perfectly on the rim and have a very squared off sidewall. At least that's what I imagine, seeing as how my 225/50 RE-01R's on stock 16x7's are very much NOT square

I'll allow U S to add his witty remark now...

08-18-2009, 02:41 PM	#1
e_presley20 Scooby Newbie Member#: 168640 Join Date: Jan 2008 Location: Pittsburgh PA Vehicle: 2005 WRX WR Blue	rpf1 17x7.5 or 17x8 I was wondering which wheel would be better over all? is there a huge difference between 7.5 or 8? * Registered users of the site do not see these ads.

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08-18-2009, 03:29 PM	#2
BIGHONKEY Scooby Newbie Member#: 89575 Join Date: Jun 2005 Location: Cincinnati Vehicle: '02 wrx sedan sedona red pearl	About a half inch difference.

08-18-2009, 03:39 PM	#3
e_presley20 Scooby Newbie Member#: 168640 Join Date: Jan 2008 Location: Pittsburgh PA Vehicle: 2005 WRX WR Blue	well i know that, im just saying any noticeable ride quality difference

08-18-2009, 03:49 PM	#4
mosc Scooby Specialist Member#: 177401 Join Date: Apr 2008 Chapter/Region: Tri-State Location: Philly Vehicle: 2004 STi White 16G powered lagless fun	RPF1's don't come in a plethora of sizes for 5x100. I believe 17x8" +45 is your only choice?

08-18-2009, 04:01 PM	#5
nhat #Belieber Moderator Member#: 140163 Join Date: Feb 2007 Chapter/Region: MAIC Location: 3MI Racing Vehicle: 03 STi hellaflunctional	17x8 +45 or +35. going to an 8" wide wheel allows you to go as wide as 245 while it isn't recommend to go wider than 225 on a 7.5" wheel.

08-18-2009, 11:37 PM	#7
Uncle Scotty NASIOC Supporter Member#: 16200 Join Date: Mar 2002 Vehicle: OK Houston we have an Uncle	a 17x7.5 is useless if you want a 'wide' tire, as the widest tire that fits...is a 235/40 you can put a 245/40 on a 17x8...and a 235/40 is GREAT on a 17x8

08-19-2009, 01:59 AM	#8
Chainsaw_Willie Scooby Newbie Member#: 211337 Join Date: May 2009 Location: Seattle Vehicle: 2006 WRX Silver	I'm running the 215/45s that came with my car on my 17x8 RPF1s until they wear out. Tire Rack even says that's the recommended size for this wheel (though I have no idea why). I see no reason you couldn't run a 225 if you wanted to, it'd be a better fit than the 215s are. When these 215s wear out I'm going either 235 or 245.