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Tire size fit question for 996.1? Needs new shoes

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YOUR RESEARCHTire size fit question for 996.1? Needs new shoes

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Use 225's in the front

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I use 225's in the front on my 03 C2 Coupe w/18" OEM wheels.
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Tire size fit question for 996.1? Needs new shoes

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Use 225's in the front

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I use 225's in the front on my 03 C2 Coupe w/18" OEM wheels.
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Tire size fit question for 996.1? Needs new shoes

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POST 1 / ORIGINAL POSTEROriginal post

I'm getting ready to order Michelin PS4s for a 1999 c2 cabrio. The current tires fronts are ozone/load cracking and rears are some no name cheap brand. OEM 18 inch twist rims. Original sizes for the 99 are 225/40/18 and 265/35/18 From what I've researched 235/40/18 and 285/35/18s should fit correct? Is there a better size or should i add more diameter so speedo is accurate (reads 5mph high at 70) Seems like everyone adds a bit more rubber to these. Just wanted to ask before I spend $1k on tires. Read through a lot of different threads on tire sizes and fitment Gene

POST 2Original post

I use 225's in the front on my 03 C2 Coupe w/18" OEM wheels. It's what the owner's manual says to use. I would stay with that size. My speedometer is about 2 mph higher than what a GPS says. From what I've heard that's normal for Porsche.

POST 3Original post

I just bought PS All Season 4's at Costco in March for my 996.1 Cab that the prior owner had switched to Carrera Mk2 rims: 225/40/18 (8" rims) and 275/35/18 (10" rims). I think stock was 7" and 9"?. We tried 235's but they did rub enough that I just decided to keep it stock. I had the option of 285's or 275's in the back and I opted for the smaller because there would have been a 1" (4%) front to back difference with the 285's. With my current set up the f/r difference is only 1/2" and the speedo is over by just 1mph. If you are ok with the front's rubbing, or molding the liner, I think you will be fine with the sizes you are looking at as many others have installed those sizes. I spent more time than ever before trying to get the "right" size & look. Look to tiresize.com for their f/r visualizer. Also, I think Costco still has $110 off on all Michelin's.

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