pirelli CN36 215/60-15 on narrow body?

[dwelle]

anyone run a 215/60-15 CN36 on the back of a narrow body car on 7's that can comment on fitment?

i know the RS ran these tires with flares. my '76 had some crappy 215/60-15's on it when i bought it, so imagine with enough negative camber and height adjustment is should work. hoping someone may have done this.

currently running 205/55-15 yokohamas all around.



my car has a 3.2, so i think the additional diameter (almost 1.5") shouldn't be too much of an issue. this is DD for me, so low gearing and ride height aren't the biggest priority.

ulitimately, i'd like to be able to cruise at 80 without spinning almost 4K as i do now...

[john walker's workshop]

An .072 5th gear swap would fix that.

[Showdown]

I have a ‘77 with 6&7x15 and I have the Pirelli P6000 in 195/65 front and 215/60 rear and they ft no problem. Only problem is the $1300 price tag for the set ☹️

The PO had Pirelli 205/50 front and 225/50 real but they looked ridiculous on a non-lowered car

[dwelle]

Originally Posted by john walker's workshop

An .072 5th gear swap would fix that.

john, i've considered that. i do wonder what will be available for 15" tires in the future (i think these classic tires will stick around) and even with 55 series tires, my car is low. as this car is more of a daily (i have other cars to hot rod) the extra ride height would actually be nice...

[kach22i]

FYI: recent 3-page thread on this topic.

15” wheel/tire dilemma
15” wheel/tire dilemma

Under the images on post #15, I list some of my 15" tire finds.

Originally Posted by dwelle

anyone run a 215/60-15 CN36 on the back of a narrow body car on 7's that can comment on fitment?...

I have Goodyear Eagle All Season 215/60 R15 on J7's at the rear of my narrow body 1977. I'm not sure that when I lower it how it's going to fit, and I ground down the inner flare returns years ago. Right now the rear is hovering up in the air after taking weight out of the car so it's not a problem.

My neighbor says we will test fit his old 16" J7's with 225/50 R16 on the rear of my car as they used to fit his stock 1976. I don't see how but have read about others doing it without extreme camber angle.

One would assume if hovering in the 25 inch diameter be it 15R or 16R that 205's will always fit, 215 can fit, and sometimes 225's will fit on a narrow body. The 225's are on a yellow long hood posted in the forum if I recall correctly.

You may need to find a local shop that allows test fitting of rubber.

[fintstone]

Car looks great as is IMHO.

[Mervo]

Will the suspension arms and bushings and the steering take the extra load?

[john walker's workshop]

Originally Posted by john walker's workshop

An .072 5th gear swap would fix that.

0.72, not .072.

[356RS]

I been running the CN-36's with the 215/60-15 rears for about one year. They perform great.

[Bill Verburg]

Originally Posted by dwelle

anyone run a 215/60-15 CN36 on the back of a narrow body car on 7's that can comment on fitment?

i know the RS ran these tires with flares. my '76 had some crappy 215/60-15's on it when i bought it, so imagine with enough negative camber and height adjustment is should work. hoping someone may have done this.

currently running 205/55-15 yokohamas all around.



my car has a 3.2, so i think the additional diameter (almost 1.5") shouldn't be too much of an issue. this is DD for me, so low gearing and ride height aren't the biggest priority.

ulitimately, i'd like to be able to cruise at 80 without spinning almost 4K as i do now...

My experience on a '72 w/ stock suspension and alignment was that the 7 w/ 215/60 burned the paint a couple of inches above the lip

not sure what Yokes you have but comparing 205/55 S.drive to CN36 215/60,
gearing cost is ~ 17.3lb-ft and inertial cost increases the net cost by ~2.3lb-ft because though the tires weigh about the same the weight is further from the axis of rotation

Additionally you will want to change the fronts to a taller tire, either 185//70 or 195/65 which may potentially add to the torque cost

currently 82mph is ~4k, w/ 215/60 it would be ~87mph

as John says changing 5 to .72 also changes 4k to 87mph

[tk32]

Originally Posted by 356RS

I been running the CN-36's with the 215/60-15 rears for about one year. They perform great.

7R in the rear? Spacers? Rolled fenders?

Thanks, great look out back

[356RS]

Deep 6's modified to 7" wide all the way around by Harvey Weidman. 5mm spacers to clear 930 calipers. Stock fender lips.

[Bill Verburg]

There's a huge difference in the way 7r fits vs 7
7r is ET 49
7 is ET23.3
the 7 r sits over an inch more inboard, 25.7mm to be exact, this puts the inside edge too far inboard, it will interfere w/ oil lines and trailing arm hardware at a minimum, so you need a minimum of a 4mm spacer to get clearance

most n/b w/ the 7r use a 7 to 16mm spacer depending on the tire used

[dwelle]

Originally Posted by Bill Verburg

My experience on a '72 w/ stock suspension and alignment was that the 7 w/ 215/60 burned the paint a couple of inches above the lip

not sure what Yokes you have but comparing 205/55 S.drive to CN36 215/60,
gearing cost is ~ 17.3lb-ft and inertial cost increases the net cost by ~2.3lb-ft because though the tires weigh about the same the weight is further from the axis of rotation

Additionally you will want to change the fronts to a taller tire, either 185//70 or 195/65 which may potentially add to the torque cost

currently 82mph is ~4k, w/ 215/60 it would be ~87mph

as John says changing 5 to .72 also changes 4k to 87mph

thanks bill, always appreciate the feedback.

car has 21/29 mm Tbars, and was running 215/60-15 when i bought it. wasn't quite as low as it is now and had a fair bit of negative camber and i had no rubbing issues. this is how it looked:



fwiw, when i finished building this car, i put 205/50-15 RE-71's on. it was just too low for the car's intended use by the time i got the ride height where i liked it. it was also geared too low, that's how i ended up with the S drives...

[spyerx]

Originally Posted by 356RS

Deep 6's modified to 7" wide all the way around by Harvey Weidman. 5mm spacers to clear 930 calipers. Stock fender lips.

Great thread.

@356RS Would you mind sharing your fender center line heights F/R (ie ride height) and camber settings with your setup?

I've a 71 (stock body) that I'd like to put a CN36 in 215 on a 7R out back (with appropriate spacers). I have deep6 with CN36 185 today.

Car has: 21/26TB, 18mm F/R sways, elephant adjustable spring plate, elephant digressive dampers F/R, ~2200lb weight. Suspension is all fresh rubber.

I keep hearing "Works" or "rubs" which means... it's all in the setup!

Would love to know though on this before I drop the $ on a pair of 7R or modded Deep6 wheels for the back.

[356RS]

Originally Posted by spyerx

Great thread.

@356RS Would you mind sharing your fender center line heights F/R (ie ride height) and camber settings with your setup?

I've a 71 (stock body) that I'd like to put a CN36 in 215 on a 7R out back (with appropriate spacers). I have deep6 with CN36 185 today.

Car has: 21/26TB, 18mm F/R sways, elephant adjustable spring plate, elephant digressive dampers F/R, ~2200lb weight. Suspension is all fresh rubber.

I keep hearing "Works" or "rubs" which means... it's all in the setup!

Would love to know though on this before I drop the $ on a pair of 7R or modded Deep6 wheels for the back.

Torsion Bars: R-29 and F-22. Swaybars R-18 F-18. -2 degree rear camber. Rear fender center-24" and Front fender 23.75".
I might be wrong on my posted spacer size. I'll have to double check.

[spyerx]

Originally Posted by 356RS

Torsion Bars: R-29 and F-22. Swaybars R-18 F-18. -2 degree rear camber. Rear fender center-24" and Front fender 23.75".
I might be wrong on my posted spacer size. I'll have to double check.

Thank you! Appreciate the quick response.

[tk32]

+1 thanks 356RS

Originally Posted by Bill Verburg

There's a huge difference in the way 7r fits vs 7
7r is ET 49
7 is ET23.3
the 7 r sits over an inch more inboard, 25.7mm to be exact, this puts the inside edge too far inboard, it will interfere w/ oil lines and trailing arm hardware at a minimum, so you need a minimum of a 4mm spacer to get clearance

most n/b w/ the 7r use a 7 to 16mm spacer depending on the tire used

and Mr. Bill for the spacer info

[911pcars]

Early on, I fitted Pirelli CN36, 215/60-15s on aftermarket Fuchs 7s on the rear of my stock bodied '69. At factory ride height, and if you drive sedately and never, ever negotiate road dips at speed or curves at more .4g, you should be ok. But why chance it?

Anything more than that - during steady state corners, there's a good chance the tire will rub/burn the famous quarter moon pattern through the paint about 2-1/2 - 3" up from the fender lip. Ask me how I know.

Maybe some combination of ride height, shock setting, spring rate or a Paris-to-Dakar-like setup might prevent that. If so, your ride (car) is compromised. Eliminate the interference, then drive without worrying about speed thresholds, driveways, cornering G forces, paint, fender and oil line rubbing.

S

[mar2mar]

What is the total width from side wall to sidewalk of Pirelli CN36 215/60/15 when it is mounted on a 7R Fuchs wheel?

I have a CN36 185 on 7R Fuchs mounted at the back of my 70S. I would like to switch to 215/60/15 if it will fit. My right rear quarter panels seems narrower than normal.

Thanks
Marlon