What size tire are you using???

ctrain22 · August 15th, 2009, 08:03 PM

I have 15x7 rallies that I got for my 68 442 and I'm trying to find the right size tire. Looking at 225-70-15 or 225-60-15. What size are you all using. Pictures would be great.

jeffu231 · August 16th, 2009, 08:31 AM

I have 245/60R15 on mine. That size and profile is very close to the original 14 inch diameter and keeps the speedometer close.

oldsdroptop · August 17th, 2009, 07:22 PM

I'm running 245 60's BFG on mine....15" of course. And wheel vintiques chrome SS1's............... gotta keep it real. Olsdroptop

666 the legend · August 17th, 2009, 07:34 PM

...275/60 r 15...

derek nesdoly · August 17th, 2009, 09:23 PM

Quote:

Originally Posted by 666 the legend

...275/60 r 15...

Using this size on my ride.Had to go for 1972 Olds 98 rear coils to stop the "rub" of the rear tires on the fenders!! Then re-did the front coils to level her out.There are some pics of my car on the "OCC" thread [red on red 69 442] ........Derek

BerBer5985 · August 31st, 2009, 10:30 AM

Yeah I was wondering that size tire would rub.

4fortwo · August 31st, 2009, 03:18 PM

Quote:

Originally Posted by BerBer5985

Yeah I was wondering that size tire would rub.

You have to account for the wheels backspace. I use 275/60/15 and have plenty of room but the wheel has a 4.25" backspace on a 15x8. If you run that tire on anything less than a 3.5" backer you'll have trouble.

ziff396 · August 31st, 2009, 06:04 PM

I am running BFG 245/60/15 on the front and BFG 275/60/15 on the rear. 7" front SS1 wheel vintique's and 8" on the rear. 1" lowering springs on the front and stock rear springs. Sits nice and no air shocks! 72 Cutlass 455. Pic's soon.

marzgtp1 · August 31st, 2009, 07:20 PM

I'm running 255/60/15 cooper tires I just for 65.50 each plus shipping.

Yellowstatue · September 1st, 2009, 04:03 AM

I am using 255/60X15 on the rear of our two '68 442's and have no clearance problems using used Vista springs to get the ass end up...

stlbluesbrother · September 9th, 2009, 10:16 PM

I wonder if I'm going too small on my 1970 Cutlass?

I just ordered BF Goodrich P225/70R14 to go on the original 14x7 Rally SSI's. This tire size was determined from a Tire Conversion Chart based on the old G70x14 (white letter) standard. http://www.tirerack.com/tires/tirete...sionchart.html. Any thoughts?

svnt442 · September 9th, 2009, 10:35 PM

Those are the correct diameter for the car. What engine do you have? Anything with power will over power them in a hurry.

stlbluesbrother · September 9th, 2009, 11:08 PM

Hi Randy,

The Cutlass Supreme has a 350 v8 with 4 barrel carb. And the differential is geared as highway cruiser at 2.56

442much · September 9th, 2009, 11:32 PM

I'm running the original size for my car...225/70Rx15 or GR70x15

svnt442 · September 10th, 2009, 12:26 AM

Quote:

Originally Posted by stlbluesbrother

Hi Randy,

The Cutlass Supreme has a 350 v8 with 4 barrel carb. And the differential is geared as highway cruiser at 2.56

You should be OK and have the ability for a little tire smoke if called for

.

I had a 2.56 geared 70 run in the high 13's (13.89 @ 97mph) with a mild 455. The car was capable of 150 miles per hour I'm sure, but the suspension left A LOT to be desired so I never attempted it.

Olds64 · September 10th, 2009, 06:53 AM

This is a good thread. It is good to know what tire size others run so you can have a starting point when buying new wheels or tires for your own car. Now if only I could figure out if I could run 10" wheels on my 98 behind the rear fender skirts.

svnt442 · September 10th, 2009, 12:19 PM

Well if you cut out part of the trunk............

Olds64 · September 10th, 2009, 12:29 PM

August 15th, 2009, 08:03 PM	#1 (permalink)
ctrain22 Registered User Join Date: Oct 2008 Location: Ventura, CA Posts: 141	What size tire are you using??? I have 15x7 rallies that I got for my 68 442 and I'm trying to find the right size tire. Looking at 225-70-15 or 225-60-15. What size are you all using. Pictures would be great. __________________ 68 442 Convertible

August 16th, 2009, 08:31 AM	#2 (permalink)
jeffu231 Registered User Join Date: Jan 2009 Location: Maryville, Il Posts: 9	I have 245/60R15 on mine. That size and profile is very close to the original 14 inch diameter and keeps the speedometer close. __________________ Jeff 1970 Cutlass S

August 31st, 2009, 06:04 PM	#8 (permalink)
ziff396 Registered User Join Date: Jun 2008 Location: Michigan Posts: 64	I am running BFG 245/60/15 on the front and BFG 275/60/15 on the rear. 7" front SS1 wheel vintique's and 8" on the rear. 1" lowering springs on the front and stock rear springs. Sits nice and no air shocks! 72 Cutlass 455. Pic's soon. Last edited by ziff396; August 31st, 2009 at 06:08 PM.. Reason: year.

September 1st, 2009, 04:03 AM	#10 (permalink)
Yellowstatue Certified Fanatic Join Date: Jan 2009 Location: Too close to Toronto!! Posts: 567	Tires I am using 255/60X15 on the rear of our two '68 442's and have no clearance problems using used Vista springs to get the ass end up... __________________ '57 S88 HC et al; '68 442 M20; '68 442 M21; '68 W30; '68 Vista et al; '80 -'84 Regency et al; '96,'98.'99 Aurora..Ignition ON

September 9th, 2009, 10:16 PM	#11 (permalink)
stlbluesbrother Registered User Join Date: Aug 2009 Location: St. Louis, Missouri Posts: 68	I wonder if I'm going too small on my 1970 Cutlass? I just ordered BF Goodrich P225/70R14 to go on the original 14x7 Rally SSI's. This tire size was determined from a Tire Conversion Chart based on the old G70x14 (white letter) standard. http://www.tirerack.com/tires/tirete...sionchart.html. Any thoughts? __________________ 1970 Cutlass Supreme convertible

August 17th, 2009, 07:34 PM	#4 (permalink)
666 the legend Registered User Join Date: Dec 2008 Location: Philly Posts: 93	...275/60 r 15...

August 31st, 2009, 10:30 AM	#6 (permalink)
BerBer5985 Registered User Join Date: Jun 2009 Posts: 92	Yeah I was wondering that size tire would rub.

August 31st, 2009, 07:20 PM	#9 (permalink)
marzgtp1 Registered User Join Date: Feb 2008 Posts: 48	I'm running 255/60/15 cooper tires I just for 65.50 each plus shipping.

September 9th, 2009, 10:35 PM	#12 (permalink)
svnt442 Registered User Join Date: Jun 2009 Location: San Jose, CA Posts: 454	Those are the correct diameter for the car. What engine do you have? Anything with power will over power them in a hurry. __________________ Randy 1970 442

September 9th, 2009, 11:08 PM	#13 (permalink)
stlbluesbrother Registered User Join Date: Aug 2009 Location: St. Louis, Missouri Posts: 68	Hi Randy, The Cutlass Supreme has a 350 v8 with 4 barrel carb. And the differential is geared as highway cruiser at 2.56 __________________ 1970 Cutlass Supreme convertible Last edited by stlbluesbrother; September 9th, 2009 at 11:12 PM..

September 9th, 2009, 11:32 PM	#14 (permalink)
442much Registered User Join Date: Jan 2008 Location: Sherwood Park, Alberta Posts: 477	I'm running the original size for my car...225/70Rx15 or GR70x15 __________________ Ken www.oldsnorthernlights.com 1998 Oldsmobile Intrigue GL / 3.8 V6 1976 Oldsmobile 442 / 455 V8 http://www.cardomain.com/ride/2057807 http://v8cars.hu/73-77cutlassregistr...=4664fd557339a "When you turn your car on, does it return the favour?"

September 10th, 2009, 06:53 AM	#16 (permalink)
Olds64 Landyacht Club President Join Date: Jul 2007 Location: Lawton, OK Posts: 4,286	This is a good thread. It is good to know what tire size others run so you can have a starting point when buying new wheels or tires for your own car. Now if only I could figure out if I could run 10" wheels on my 98 behind the rear fender skirts. __________________ Ferris, my father loves this car more than life itself... Apparently, you don't understand! Ferris, he never drives it! He just rubs it with a diaper! Cameron Frye Ferris Bueller's Day Off 1986

September 10th, 2009, 12:19 PM	#17 (permalink)
svnt442 Registered User Join Date: Jun 2009 Location: San Jose, CA Posts: 454	Well if you cut out part of the trunk............ __________________ Randy 1970 442

September 10th, 2009, 12:29 PM	#18 (permalink)
Olds64 Landyacht Club President Join Date: Jul 2007 Location: Lawton, OK Posts: 4,286	__________________ Ferris, my father loves this car more than life itself... Apparently, you don't understand! Ferris, he never drives it! He just rubs it with a diaper! Cameron Frye Ferris Bueller's Day Off 1986

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