Danno

" I have an '85 car (non ABS which I assume is identical to the '86 model?) "

While the wheels used on the '85 and '86 is the same 23.3mm offset, the rear hub does not have a 21mm spacer on the '86. The effect is that the rear wheel on the '86 looks about 1" inset into the fenders compared the '85. strange... This does have a bearing on the size of the spacers and studs you want to use with aftermarket wheels.

"I currently have a set of 17" cup 2 replica wheels with what I assume to be the correct set of spacers (I'v had no problems anyway.) what offset would I need to run a set of deeper dish wheels such as the 18" 3.6 turbo cup wheels or a set of 17" BBS Super RS with 285 rear and 235 front tires?

Also if I removed the spacers could I change the offset to make the wheels appear deeper dished? I really like the look of deep wheels on the 944 but I know nothing about offsets! (obviously)
"

By "deeper dished", do you mean that the outer rim-half is wider? The only way you can do that to an existing wheel is to get new rim-halves. General rule of thumb for the same rim-widths, a rim with less offset will have a deeper dish look with a wider outer half. So an 8" wide rim with 23mm offset will have a deeper dish than a 55mm offset 8" rim.

However, rim-widths also affect the outher half width as well. So take that 8" wide 23mm offset and compare it to a 10" wide 55mm offset rim. That 10" wide rim will have a wider outer half with deeper dish.

Then the deepest dished rim will be an 11" wide one with 23mm offset... Be careful about juggling offsets, widths and backspacing simply for the sake of looks, you can be sacrificing a lot of durability and safety. Pick these dimensions for optimum performance and fit only, then choose the styling look you want based upon the design of the wheel.

"what offset would I need to run a set of deeper dish wheels such as the 18" 3.6 turbo cup wheels or a set of 17" BBS Super RS with 285 rear and 235 front tires?"

These wheels are made for the '89+ late-offset 911 cars, meaning 40-65mm offsets. So you'd want to keep the existing spacers you have for the 17" Cup Replicas and those new ones should work fine.

shortyboy

Instead of starting a new thread, I figure I re-use this thread....


I have an 86' 951 and got set of D90's I want to use. According to http://www.944racing.de/wheelweights.php spec sheet, the wheels I have now are ET23 and my D90s are 6Jx16 ET52.,3 and 8Jx16 ET52,3...So will I need a 29mm spacer in front and back?Kinda confused..

pa951

That would be correct if you would have the 7j wheel in stead of the 6j. That wheel is to small and is from a 911.

To get the correct fitting you should correct the width. So spacers should be 41 at the front. Maybe better to find the 944 d90 wheels.

333pg333

6"? Damn that's super small on our cars.

shortyboy

so I wont be able to use the front rims?even with spacers?

pa951

It Will fit but looks weird. Use the bigger spacers or buy correct wheels.

shortyboy

cool thanx guys, these rims/tires i bought a few years ago are from a C2, i think and tires are almost new without any curb damage.i just wanna use them until i can buy me a set i really want.guess ill be buying H&R 21 and 28mm with longer studs.thanks again guys!

1950duffer

hello.... I need some advise. I have a set of 4.. cup 1 replica wheels. 17" x 7.5" & 9" on my 951. The front fit perfect but the rears are about 1/2" outside the wheel openings I want the rears inside the wheel openings. I live in Northeastern Vermont (5 miles from Canada) and there is no one to rely on. Can someone PLEASE help me. Thank you

Smudo

Generally Cup 1 replica wheels (9'' with ET around 50) should not stick outside the fenders (I assume you have late offset car - 87 or later year). Can you verify what the ET of your rims is? However, generally it he rims stich 1/2'' outside the fenders there is nothing much you can do about it (except extremely stretch the tires and make huge negative chamber in the rear, but I would not advise it.

1950duffer

The 951 is a 1986. My wheels are as follows: Front & 7.5 J X 17 ET 52 & rears which are 9 J X 17 ET 15 What can I do to bring the rear wheels inside the wheel openings ? Can I use a thinner hub??
Can you help me ? Thanks

1950duffer

I recently posted an inquiry, with no response, regarding the following problem. I purchased a set of replica cup 1 wheels for my 1986 .. 951. Front 7.5" X 17 ET 52 The rears are 9" X 17 ET 15. The rears are about 1/2 to 3/4 " out side the wheel openings. Would like that distance inside the wheel openings. Can someone PLEASE help me accomplish moving the rears inside the wheel openings ? Thanks in advance for your time & efforts

FrenchToast

If there is an existing spacer on the rear hub, you can remove it and test the fitment.

If there is no existing spacer, there is nothing you can do.

Not only does your wheel set not fit your car, but it is also mismatched. You have late offset front wheels and 'early' offset rear wheels.

The best remedy is get wheels that are designed to fit your car.

mel_t_vin

What is the 10th digit of your VIN?

1950duffer

The tenth digit is a "G" Thanks Duff

mel_t_vin

Okay...confirms your statement that the car is an '86. Initially sounded like you were trying to run an et15 wheel on a late offset car.

There should be no fitment issue running a 9" et15 wheel in the rear of an early-offset 944. Could this be a 10"+ wheel?

Do you have a spacer on the rear hub? That 9" wheel should not extend, at all, past the fender lip. Due to the final assembly process, the 944 rear suspension is notorious for being offset to one side by 0.2"-0.5"...passenger side if memory serves. Do these wheels extend past the lip on both sides? Equally?