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You'll have to redo the entire setup you have now as you're currently staggered ... I know how you like to change things, but unless this is a track car I really don't see the point. You could lighten up the spring rates and change the damper settings a bit and achieve nearly all of what you're looking to accomplish, no?
That being said, I am thinking along the same lines. I have two sets of the original cups, and am thinking of using the 9s all the way around. I'm already on 17s though.
Joel Wahlsten
93 968 Amazon Green w/LSD and a few mods
2017 Cayenne GTS Mahogany Metallic
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Go a little wider to 9.5" 17s?
Current:
2016 Cayman S
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94 968 Cab 6 Spd. Black/Cashmere D1R SC
86.5 928 Garnet Red Metallic
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A softer tire can make a huge difference in ride quality. I tried about 5 different sets of tires on our Jaguar S-Type R before I found something with a nice ride. It might be a gamble because nothing may accomplish what you want but its an option.
1993 968 Cab, 6 speed - Airbox mod, RS Barn catback, RS Barn Stage 1 Chip, Sport Design wheels, M030 swaybars, Design 1 chassis braces (upper and lower)
2009 Dodge Ram 1500 Sport - Inferno Red\Slate Leather Int
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A compromise usually results in nothing being done very well. I have 19s on my Cayman and 17s on my 968 and they are equally harsh (or pleasant, depending upon how full my bladder is) to me. I would stay with the 18s as you have a car that is set up now to be very capable. If the weight is an issue then I think that your driving style needs the lowest profile possible.
Kim Strong, Nova Scotia
Baron of Bugtussle and Lord of Wigtownshire, Scotland
2022 Mustang Mach-E
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I say go 17, and keep the width. For touring comfort is more important than the look of 18's. I wouldnt sacrifice traction, or handling tho. My $.02 .
86' India red 951 3.0 8v turbo
87' Guards red 951 parts car(scrapped :-( )
93' GP white 968 manual, coupe(restoration/modifications in progress)
"I couldn't find the sports car of my dreams, so I built it myself."Ferdinand Porsche
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Aren't you glad you have us to use as your "muse"...
Joel Wahlsten
93 968 Amazon Green w/LSD and a few mods
2017 Cayenne GTS Mahogany Metallic
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Depends on what you're looking to achieve but, at least in Europe, you can't get wider r-tires than 255 if sticking with 17" (save for 355 but that would be over the top). I went to 18" because of that, would have stayed with 17" otherwise.
1995 Riviera blue 968CS with LSD, custom LEDA coilovers with t-bar delete, S4 brakes, RS Barn braided lines, Tarett sways, Racers Edge bushings everywhere, Rack Tack, Design 1 braces and short shift kit, air box mod, RS Barn stage 1 chip, RS Barn cat back, RUF BTR2 wheels with Toyo R888, Deutsch Nine TRS version 2 rear wing (carbon fiber), AIR repop splitter (carbon fiber), brake cooling intakes (carbon fiber), Sparco seats and belts, OMP steering wheel and a lot of other little things that I can't recall at the moment...