08-15-2019, 01:41 PM
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#1
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Registered User
Join Date: Jan 2005
Posts: 20
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Why go from 17 wheels to 18?
Hi all. Just wondering what the benefits are from 17 to 18 inch wheels for an S other than looks. I found a set of Porsche 18s wheels for $600. No tires, just wheels. Is there a performance benefit and is it worth the extra cost of wheels and bigger set of tires? The tires on my 17s need to be replaced anyway so nows the best time to w the change. Thanks.
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08-15-2019, 02:50 PM
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#2
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Registered User
Join Date: Sep 2016
Location: Stow, MA
Posts: 918
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The drawbacks are a harsher ride and more expensive tires.
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2004 Boxster S Silver - FUNTOY
2002 Boxster Base Guardsy Red - FUNBOX
1987 Caterham Super 7 1700 Supersprint
2009 Mercedes Benz CLK 350 convertible
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08-15-2019, 03:47 PM
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#3
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Registered User
Join Date: Dec 2015
Location: Denver
Posts: 866
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18" will compensate some from lowering the P car to status quo
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5280 Cruising @High Altitude
Seal Gray & K&N Filter
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08-16-2019, 05:51 AM
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#4
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Registered User
Join Date: Mar 2017
Location: Arizona
Posts: 178
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Quote:
Originally Posted by cantdrv55
Hi all. Just wondering what the benefits are from 17 to 18 inch wheels for an S other than looks. I found a set of Porsche 18s wheels for $600. No tires, just wheels. Is there a performance benefit and is it worth the extra cost of wheels and bigger set of tires? The tires on my 17s need to be replaced anyway so nows the best time to w the change. Thanks.
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Better looks.
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08-16-2019, 05:55 AM
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#5
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Registered User
Join Date: Sep 2012
Location: S. New Jersey
Posts: 1,239
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Doesn't the S need the 18s because of the larger front brake caliper or do 17s have enough clearance?
I have 18s but I would think that 17s would handle better and tires would be a bit cheaper
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2002 S - old school third pedal
Seal Grey
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08-16-2019, 06:45 AM
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#6
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Registered User
Join Date: Feb 2016
Location: SE USA
Posts: 317
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Looks mostly. The 18's fill the wheel well more than the 17's. I have a set of 18's I run normally and 17's I use for autocross. I can't tell a huge difference in the ride quality but I'm sure there is a little bit as the 17's put more space between you and the road.
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08-16-2019, 08:14 AM
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#7
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Registered User
Join Date: Nov 2012
Location: SW Okla
Posts: 1,115
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Quote:
Originally Posted by kk2002s
Doesn't the S need the 18s because of the larger front brake caliper or do 17s have enough clearance?
I have 18s but I would think that 17s would handle better and tires would be a bit cheaper
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S models are fine (and were standard wheel) with 17's. It's 16's that don't clear the calipers.
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I think I have a Porsche problem...
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08-16-2019, 10:16 AM
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#8
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Registered User
Join Date: Mar 2013
Location: New York
Posts: 347
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But with 18s you can get Bridgestone RE-71s on! Not on 17s.
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08-16-2019, 10:44 AM
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#9
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Registered User
Join Date: Jan 2005
Posts: 20
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Quote:
Originally Posted by Blackcloud
But with 18s you can get Bridgestone RE-71s on! Not on 17s.
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Serious question. Is that a good thing? I thought most prefer Michelins.
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08-16-2019, 10:54 AM
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#10
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Registered User
Join Date: Sep 2012
Location: S. New Jersey
Posts: 1,239
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Quote:
Originally Posted by cantdrv55
Serious question. Is that a good thing? I thought most prefer Michelins.
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No Most Dentists prefer Colgate over Crest
Oh know, I feel a tire thread starting
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2002 S - old school third pedal
Seal Grey
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08-16-2019, 02:01 PM
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#11
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Registered User
Join Date: Mar 2013
Location: New York
Posts: 347
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Quote:
Originally Posted by cantdrv55
Serious question. Is that a good thing? I thought most prefer Michelins.
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Most doing autocross prefer the RE-71s. Not looking to start a tire debate.
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08-16-2019, 02:03 PM
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#12
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Registered User
Join Date: Mar 2013
Location: New York
Posts: 347
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Quote:
Originally Posted by kk2002s
No Most Dentists prefer Colgate over Crest
Oh know, I feel a tire thread starting
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A lot of autocrossers prefer the RE-71S. Not looking to start a tire debate.
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08-16-2019, 04:46 PM
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#13
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On the slippery slope
Join Date: Mar 2014
Location: Austin and Palm Springs
Posts: 3,793
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Quote:
Originally Posted by Blackcloud
But with 18’s you can get Bridgestone RE-71’s on! Not on 17’s.
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what you talking bout Willis??
Re-71's and lot of other trackable tires come in correct 17" sizes. I and many others have been running RE-71's in 255/40-17 and 225/45-17 for years
17's fit a S no problem
17's are lower cost
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2014 Porsche Performance Driving School
2020 BMW X3, 2013 Ram 1500, 2016 Cmax, 2004 F-150 "Big Red"
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08-16-2019, 06:31 PM
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#14
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Registered User
Join Date: Mar 2010
Location: canada
Posts: 445
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I had to upgrade to 18's when I did the bigger brake upgrade and aesthetics was a bonus.
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08-16-2019, 06:54 PM
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#15
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Registered User
Join Date: Nov 2016
Posts: 130
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Quote:
Originally Posted by RedTele58
S models are fine (and were standard wheel) with 17's. It's 16's that don't clear the calipers.
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16's with the correct offset would have no problem clearing the S calipers. The problem is nobody makes them.
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08-16-2019, 06:57 PM
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#16
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Registered User
Join Date: Jan 2005
Posts: 20
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My favorite tire place, Costco, doesnt carry the RE-71s for the front! Too bad as Bridgestone are on sale.
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08-16-2019, 08:36 PM
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#17
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NewUserName
Join Date: Oct 2018
Location: Delaware
Posts: 101
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Quote:
Originally Posted by Anker
The drawbacks are a harsher ride and more expensive tires.
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And, usually, the typical compound used in 18" tires wears faster than the typical 17" tire compound, as 18s usually have a higher performance rating.
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08-17-2019, 08:17 PM
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#18
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On the slippery slope
Join Date: Mar 2014
Location: Austin and Palm Springs
Posts: 3,793
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Quote:
Originally Posted by DoninDel
And, usually, the typical compound used in 18" tires wears faster than the typical 17" tire compound, as 18s usually have a higher performance rating.
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Really???
Performance rating has nothing to do with tire diameter.
I would think the compound in a given tire model would be the same regardless of size.
__________________
2004 Boxster S 6 speed - DRL relay hack, Polaris AutoTop DIY
2004 996 Targa Tip
Instructor - San Diego region
2014 Porsche Performance Driving School
2020 BMW X3, 2013 Ram 1500, 2016 Cmax, 2004 F-150 "Big Red"
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08-18-2019, 04:24 AM
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#19
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Artist, 986S tinkerer
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,821
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Quote:
Originally Posted by cantdrv55
My favorite tire place, Costco, doesn’t carry the RE-71s for the front! Too bad as Bridgestone are on sale.
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I run 235/40/18s on the front from Costco. They weren’t listed on their site but I could order them at the store. I won’t let them mount them though.
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08-18-2019, 05:28 AM
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#20
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Registered User
Join Date: Apr 2016
Location: SE Michigan
Posts: 497
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Quote:
Originally Posted by Anker
The drawbacks are a harsher ride and more expensive tires.
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And weight... Stock to stock 17" is lighter with tire mounted.
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