Fuch 7+8s tire size?

Hello all
I have just bought a set of Fuchs 7s + 8s x 16" for my 85 carrera coupe and am wondering what is the best size tires for these rims and this car?Iwill be selling my 17" RUFs.
Thanks in advance!

I'm interested in your Ruf wheels.

I'd go with 205 and 245

Dan Tolley

1987 911 (little 6 x 7 Fuchs)

For 7 & 8x16 you need: 205/55 & 225/50.

Mikkel, those sizes would work for 6 and 7" rims. For 7 and 8" rims you'd go up in size.

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Mark Szabo
1986 911 Targa 3.2
1987 Escort 5-speed 1.9
The Porsche Owners Gallery

205/55 245/45 What's up with the ruffs..Please let me know

I'd go 205/55 225/50.

This dude is on Rennlist looking for RUF wheels

mailto:youssef101@home.com

I saw your post on Rennlist, so I am reposting what I posted there, from my experience.

I prefer 225/50 and 245/45 combination. Check the tire manufacturer for proper fittment. I didn't check, but I don't believe that 225/50 on a 9 inch rim is optimum. Just check Tirerack and check the specs for the tire you want. I just checked and 225/50 recommended rim width is 6-8" for the two tires I picked and 245/45 recommended rim width is 7.5-9inch -- The beauty of the 245/45s is that the revs per mile is very close 840 (stock 833 with 225/50, measured on 7 inch rim). 840 revs per mile based on 8 inch rim width, narrower or wider affects the revs per mile.

I mentioned before that using 225/50 on front may slightly rub which is easily modified. 245s on the rear, no problem at all.


[This message has been edited by Alan Herod (edited 03-01-2001).]

A 225/50/16 won't just gently rubb in the front on a car that has been lowered even to Eurspecs. It will damage the fender and the tire, first hand experiance speaking. A 205/55/16 is all you are going to get and even then you may have to roll the fenders. 245/45/16 are possible in the rear but 225/50/16 is a better choice because you are keeping the same balance of tire that the car came with. 245 on the rear will just increase understeer.

Seems like everyone's experience is different. (I have even seen 245s on front with no fender lip.) Mine rubbed on the left side only. Which side did you experience the rub? My car is lowered with 1.2 degree negative camber. I drove the car fully loaded to Watkins Glen and did not experience the rub until on the track, where it hooked the unmodified fender lip slightly. Gently corrected the problem between sessions with no subsequent reoccurence.

I had 225's and 245's on 7 and 8 inch wheels on my 84 Carrera and the car was lowered. It did not rub at all. My 72 is a different story.


Michael Marshall

[This message has been edited by MMARSH (edited 03-01-2001).]

The ideal tire widths for 7 & 8 inch wheels are 205 and 225. But of course you can do otherwise if you want. That Porsche used 6 and 7 inch wheels with 205/55 and 225/50 tires is probably due to cost reasons.

Mikkel-Ideal width according to what or who?

If you want to know about ideal tire width, go to the professionals, a pointless argument will ensue here. Check http://www.tirerack.com/tires/

The tire manufacturers provide specifications on a single recommended wheel and tire combination. They also provide a range of acceptable rim widths, go to the tirerack site and check the tire specifications. 205/225 combination is acceptable, 7 and 8 inch rim width is the maximum rim width for the tire. 7 and 8 inch rim width is the "measured" rim width for the 225/245 combination. I have seen 225/50s on 7 inch on the rear with what looks like a one inch spacer behind the wheel -- this seems like a purely cosmetic approach to filling the wheel wells.

My observation -- car will accelerate faster on the smaller tire combination but corner significantly slower. 225/50s on 7 inch weighs about 4 pounds less than 245s on 8 inch -- bathroom scales, not too accurate, but good for relative weights.

According to an old article I have on wheels/suspension a low profile sport tire should have better road grip on a wide wheel than on a narrow wheel. You can put really narrow tires on wide wheels, but that would probably look silly (the german tuners often do that on non Porsche cars).

Best compromise should be (?):

7 inch wheel with 205 tire.
8 inch wheel with 225 tire.
9 inch wheel with 245 tire.
10 inch wheel with 265 tire.
ETC.

I'm starting to wonder what a Porsche dealer might recommend as best combination.

I just got my cup wheels that are 7,5 and 9 inches wide. The tires are 215 and 245. Judging on looks and the short test drive I did it seems to be a good combination. Still I've seen the same 9 inch rear wheels with both 235, 255 and 265 tires on other 911s???

[This message has been edited by Mikkel (edited 03-02-2001).]