Rear wheels rubbing 74 slim body

[matty74]

I have put on some 7 inch fuchs on the rear of the car 74 slim
and when I accelerate I get a rubbing noise its on the inside edge of the guard.

I don't want to roll the guard I just need to raise the rear end about 10mm.

any suggestions ho I might fix the problem?

[POKDUB]

If the rubbing occurs on acceleration I would suggest the rear suspension needs raising as bumps might cause greater rub or damage. Was the car somewhat low before the new wheels were added ?

[matty74]

how would I go about rasing it?

[widgeon13]

what size tire are you running on the back?

[IROC]

I don't know that raising the ride height is the best solution to your problem. You might eliminate the rubbing, but create other problems with handling, etc. Plus, it's a pain in the butt on a '74.

What sized tire are you running? Is this a 16 or 15 inch wheel? What is your current ride height? What about your alignment settings? (a little negative camber really helps in this situation).

Finally, rolling the fender lip is usually the best solution. I ran 205/60 and 225/50 tires on 7x15s Fuchs on the rear of my '76 with no rubbing problems at all merely by rolling the lips.

Mike

[PRE-H20]

that sounds odd, rubbing with a 7in fuch in the rear? you almost never hear that.

i have a 74 also, im running a 15x8 with 215-50 and no rubbing at all, even on a hard turn, no negative camber, but rolled fenders, tucks in nicely.

[IROC]

Originally posted by alexander911
i have a 74 also, im running a 15x8 with 215-50 and no rubbing at all, even on a hard turn, no negative camber, but rolled fenders, tucks in nicely.

You appear to be running your car at "rally" height though, so you are able to avoid rubbing. :>)

Mike

[Roger 911]

I'm not sure how committed you are to the Fuchs wheels. If you are open to a change, you may want to consider 16" Boxster wheels. The rears have a similar offset to the rare "R" wheels. I have these on my '72 911, allowing me to run a 7" wheel in back with a 225/50 AVS S1 tire. The car is lowered and used for DE. I have no rubbing issues, with no fender mods. I love how they look, tucked underneath the fender vs sticking out...plus they are technically factory wheels.

Now, I hope to switch to Advan A048s (stickies), which have a wider tread spec (squarer shoulder). That might be a tough fit. I may wind up going with a 225/45 in back and a 195/50 in front, reducing the overall diameter by an inch (as if the 7:31 R&P isn't low enough!). We'll see about that.

[matty74]

That looks pretty nice mate boxster wheels really compliment the slim shape.

I have 15 x 7 215 60 series, I'm really attached to the Fuchs, I'm die hard on sticking to the style.

I'm going to raise it I have some new bilstiens I have to put on the rear and I'll get the negative camber adjusted maybe raised a little as its been lowered.

I get a slight rubbing when I accelerate or corner.



BTW: alexander911 nice machine dude looks real nice

[widgeon13]

Are the Fuchs the correct offset for the 911 or are they offset for 944? I had a 74 narrow body (7 inch Fuchs rims) and ran 205/60X15 and had no rubbing but it was a tight fit without rolled fenders. You can calculate the the theoretical diameter of the tire by multiplying (2 times the aspect ratio X profile / 25.4) + rim diameter in inches. Using this formula, the 215/60 (diameter 25.15) are .6 inches larger diameter than the 205/60 (diameter 24.68). It's not a perfect calculation because tire tread width varies slightly, some are wider than others. On my car I was also able to run 225/50X15 R1's for the track and no rubbing there either. When I sold the car it had the Boxster wheels and 205/55X16 for the street and the fit was good. Regardless of what you do I think you will have difficulty with the 215/60 because of the diameter. The original tire on these cars, I believe was 185/70X15. That diameter is over 25 inches but the width is quite a bit narrower. Hope that is helpful.

[DohertyCM]

Can you show me a picture of what rolled looks like and what normal looks like. I run a 205/50/15 on fuchs 15x7. Sometimes I get a rub. I do run a lowered car. But I used to run a 205/60/15 and it didnt rub from what I remember. What part number should I look for in the boxster wheels? This is a very nice idea for my narrow body.
Is that 16 or 17 inch wheels?

[widgeon13]

The Boxster wheels are 16X7 inch and were usually take offs from people who were upgrading to larger wheels, I don't have a part number but I believe these wheels were the only 16's available. Mine came from Wheel
Enhancements. You might have some negative camber put on the back by an alignment shop and see if that helps. One thing I have learned over my time with the narrow body cars was that they tended to be different from one to the next and what worked on one might not always work on the next.

[DohertyCM]

thanks I will shop around and see what is available and give it a look.

[Adam]

Matty - the 215/60 is your problem. I had 205/60 and they were too high in the sidewall in my opinion. I switched to Yokohama ES100 205/55-15 and it's awesome. My car is really low, too.

215/60 is really more of a Commodore/Falcon family car fit - they're too puffy and too tall in the sidewall for a 911, especially a lowered one. Check out my car with 15x7 Fuchs and 205/55s below.



I was toying with the idea of 225/50 R-Spec rubber for the back (with R-Spec fronts), but I think they'd be too big.

[matty74]

yeah your right it looks heap better too, I just bought new rubber damn it.

[widgeon13]

Ask the guys where you got the tires if they will do some kind of a return or exchange, you really don't want to continue to run the 215/60 if they are rubbing.

[Adam]

Yeah - I've been thinking about it, too. If they sold you those tyres, then they haven't sold you the correct tyre for the car - they really should exchange them for a 205/60 or 205/55.

Give them a call before you do too many more kms.

[Roger 911]

For those asking about the boxster wheels...

They are 16x6 Front and 16x7 Rear, with OE rubber sizes of 205/55 and 225/50. You need to use a bolt on spacer in front (15mm, if I recall), and no spacer in back. These were the base wheels available on Boxsters for the first 4-5 years. You rarely ever see them on a Boxster, since almost everyone either upgraded at the time of ordering, or upgraded later.

I definately like the overall look of Fuchs better, especially on a car with all the stock chrome (my is black anodized). However, the additional rubber in back makes a BIG difference at the track.

I must say, I'm really surprised that someone doesn't make a replica 7" R wheel. There are a lot of narrow bodies running around, and with authentic R wheels getting a grand a piece, it would seem like a marketable product. Maybe I could start casting wheels in my basement?

[matty74]

here we go the guys at bob james tyres swapped em over

fulda 50 series 225 x 15 not so squeezy perfect and look awsome

[Fishcop]

Now you need to lower it