For the Millionth time: 7x15 Fuchs

[AG81]

NARROW FENDER CAR

If you had an ideal 7x15 that was running a 195x65 would your ideal ET be 64.88???

The typical 7x15 Fuch has a ET49 and I've been told that a 5/8" spacer is needed with the 195x65 tire.

So would the ideal ET be 64.88 or 6.058" of back space?

Thanks for your input.

[IROC]

I really can't answer your question directly, but I ran 7x15s front and rear with 225/50s on my car (1976 with stock fenders) and had no issues. I don't see why a spacer would be required. I ran 195/65s on 6s in the front and 205/60s in the rear on 7s with plenty of room, also.

FWIW, I currently run 8x17s in the front with 225/40s and they fit fine. I've rolled the fender lips, but that's it.

[LJ851]

Originally Posted by AG81

NARROW FENDER CAR

If you had an ideal 7x15 that was running a 195x65 would your ideal ET be 64.88???

The typical 7x15 Fuch has a ET49 and I've been told that a 5/8" spacer is needed with the 195x65 tire.

So would the ideal ET be 64.88 or 6.058" of back space?

Thanks for your input.

Since the ET of the Fuch wheel is positive, using a spacer reduces the ET. Your 7x15 wheel with ET 49 and a 5/8" (16mm) spacer would end up at 33mm offset. I can't imagine a spacer improving fitment on either end.

I would think stock 15x7 would fit a narrow car all around with the right tires or be very close.

A 7 inch wheel with 6 inches of backspace would be a very odd looking wheel !

[AG81]

LJ851.

Thank you. Yes it would be odd. So my math was bad (wrong) I should have deducted
15.88mm from the standard 7x15 Fuch (ET49) and arrive at an ET of 33. Say 121mm of back space.

[75 911s]

The "typical" 7X15 Fuchs for 911 is 23 ET.

The 911R Fuchs (Deep 7) 7X15 is 49 ET.

When you say narrow body, i see in your signature it must be the 72 you are talking about right? Because people might think you are talking about a G body with carrera flares (not a turbo or wide body) instead of the narrow F body that you probably are talking about.

The ideal ET would be 32 ET for the 70's narrow body cars. It can be +- a few mm because "hand built"

Maxilite makes a 911R ET 49 replica (cheap) and sorta fits, but the EB motorsports replica is wayyy better in terms of caliper clearance when using spacers.

Is this all about running a 225/50 or just a wider tire in the rear?

Keep in mind the 911R wheel is totally different in terms of how and where the pedal sits. Ideally you want to match with some real deep 6s in front. If you run flat 6s they have a different style pedal.

Group 4 also makes a Torque Thrust style wheel in a "trick" offset that I helped develop that is already at 32 ET and requires no spacers. This allows you to run a 225/50 on skinny flare 70's cars, but not the earliest slab sided cars.

If you end up with one of the replica 7R sets, take a look at the Elephant racing spacer kit as it includes 1mm spacers that can help you dial in the tire fitment.

[Bill Verburg]

Originally Posted by AG81

NARROW FENDER CAR

If you had an ideal 7x15 that was running a 195x65 would your ideal ET be 64.88???

The typical 7x15 Fuch has a ET49 and I've been told that a 5/8" spacer is needed with the 195x65 tire.

So would the ideal ET be 64.88 or 6.058" of back space?

Thanks for your input.

All Fuchs 7x15 are ET23.3 except the 7r which was ET49

for a n/b 9111 ie non SC/Carrera you can use the 7x15 ET23.3 at all 4 corners w/ 205/60, 205/55, 205/50, 195/65 or 195/60 tires

a 185/70 would be stretched beyond spec

when using the 7r wheels w/ ET49 a spacer is used how big a spacer depends on the tire

7r w/ 215/60 wants a net ~ET32 which would be a w/ a 17-15mm spacer

factory used 7-16mm spacers back in the day

[AG81]

Originally Posted by 75 911s

When you say narrow body, i see in your signature it must be the 72 you are talking about right?

Yes, A 72. To me a narrow body car is an early car (pre 74)

This has all come about because of the opportunity to have a set of wheels built.

I came up with an ET of 33.12 (for a 15 x 7) after my corrective math. I am leaning toward running the same front and rear tire size (195x65) on both front and rear.

I maybe wasting my time considering a staggered set. It might be best to just run 15x6 on all four corners.

I already have a set of Group 4 16x7 and my original 15x6 restored Fuch's.

Thank you everyone for your input.

[PeteKz]

On my 1973 with OE narrow fenders, I run 15x7 Cookie cutter wheels with my 195/55 winter tires on all four corners (ET 23, same as Fuchs). You don't need or want spacers. There is very little space between the tires and the inside of the rear fenders. At the front, they are very close to touching the outer fenders and inner fenders when the wheels are fully turned left or right and suspension compressed.

My regular tires and wheels are 16x7 Fuchs with 205/55 Michelin tires, and there's even less room between the tires and rear fenders--so little that if I have the camber more than about 1/2 degree negative, they will rub.

[Bill Verburg]

Originally Posted by AG81

Yes, A 72. To me a narrow body car is an early car (pre 74)

This has all come about because of the opportunity to have a set of wheels built.

I came up with an ET of 33.12 (for a 15 x 7) after my corrective math. I am leaning toward running the same front and rear tire size (195x65) on both front and rear.

I maybe wasting my time considering a staggered set. It might be best to just run 15x6 on all four corners.

I already have a set of Group 4 16x7 and my original 15x6 restored Fuch's.

Thank you everyone for your input.

w/ the tires i outlined above 7ET23.3 works but pushes the wheel out for a more aggressive look than ET 32, You also get a bit wider track and a bit more scrub radius

the downside to the more aggressive fit is the tire gets closer to the lip.

It all depends on the look you want w/ the tires and suspension used.

[Nditiz1]

The narrow body cars are 77 and earlier. If you pop on a long hood, front/rear bumpers/aprons, etc., it will look identical to a LWB/long hood

[AG81]

Bill,

Thank you. I'm hoping to get the car somewhat low since I've got larger sway bars and stiffer torsion bars. Not overly aggressive but very little space from the top of the tire and the fender.
I do not want to roll the fenders. So I'm going to stay conservative and stay with 15 x 6 and the 195x65 tires. I appreciate your input.

[Bill Verburg]

Originally Posted by AG81

Bill,

Thank you. I'm hoping to get the car somewhat low since I've got larger sway bars and stiffer torsion bars. Not overly aggressive but very little space from the top of the tire and the fender.
I do not want to roll the fenders. So I'm going to stay conservative and stay with 15 x 6 and the 195x65 tires. I appreciate your input.

not pushing one way or the other but here's a really nice '71, 4x 7X15 ET23.3 W/195/65

[AG81]

^
Wow. Nice car and great stance. Wonder what the outside clearance is like ????

[Bill Verburg]

Originally Posted by AG81

^
Wow. Nice car and great stance. Wonder what the outside clearance is like ????

here's a comp of 4x 7 & 4 x6 all on 195/65


due to the different ETs the 6" wheels sit ~21.6 mm more inboard

due to less stretch the 195/65 on 6 tire sits ~12.7mm more inboard

[Bill Verburg]

another pic of my old '72

the car has 7 & 8 215/235

the 7 & 215/60 is not a good fit in back( w/ stock '72 quarters but does fit in front, though IMO it's' too tall