PDA

View Full Version : How Do Some P245/60r15's Fit On A Set Of 15x7's


CutThroat
02-08-2008, 06:34 AM
i have 235/60r15's on my rims right now but i have a chance at some good 245/60r15"s for cheap. anyone use this size on their 15x7's? the 245's would be a little taller then my 235's i have on right now right? correct me if im wrong! thanks in advance...
flynbuick
02-08-2008, 06:47 AM
245s are the closest to the original G 60s that came from the factory in 1970 I use those and so do many others.
Sturmgewehr
02-08-2008, 08:13 AM
A lot of us run 255's with no problems front and rear,although I am putting
15x8's rims on my rear. If you move up-- your speedometer will be wrong--that is
assuming it was right with the 235's. Pete
David G
02-08-2008, 10:13 AM
They'll fit fine, have 'em on my 68.
gstewart
02-08-2008, 01:34 PM
i have a full set of 245r60 x 15 on my gs.
gobuick
02-08-2008, 01:52 PM
i have 235/60r15's on my rims right now but i have a chance at some good 245/60r15"s for cheap. anyone use this size on their 15x7's? the 245's would be a little taller then my 235's i have on right now right? correct me if im wrong! thanks in advance...

About 1/2" taller.
V8Sky
02-08-2008, 02:22 PM
I have 245x60x15 on 15x7 Buick rallys on the front of the car and 275x60x15 on 15x8 Buick rallys on the rear. Both sets fit great.
JohnKaz
03-03-2008, 12:46 PM
Okay, now the question becomes, how does one correct the speedometer reading if one switches from the 14" stock tires to 245-60-R15s? Is there a gear somewhere that can be swapped or something?

Thanks.

John
gstewart
03-04-2008, 08:06 AM
the difference in circumference of the 235 vs the 245 is insignificant. do not worry about changing speedo gears.
Nothingface5384
03-05-2008, 04:26 PM
235-60-15s
sidewall height 5.55
height 26.1
width 9.25
tread contact is usualy like an inch less then actual width..


245-60-15s
SH 5.79
W 26.58
H 9.65
Eric
03-05-2008, 05:06 PM
JohnKAZ
Yes...you can change the plastic gear in the side of the automatic transmission. I did that on my GSX Stage 1 and dialed in my speedometer with a portable hand-held GPS (Global Positioning Sensor) to within one
tenth of a mile per hour when I changed from a 3.64 posi to a 3.08 posi.
I doubt it's worth doing on a tire size change like you stated.

Eric :3gears:
Scot69GS400conv
03-06-2008, 12:29 PM
I just did 245/60 on 15x7's to my car for the fronts. No problem at all.

When I went from a 2.93 to a 3.42 my speedo showed way too fast for actual speed. Now I went from a 26 to a 28 inch tire in the rear. Hmmmmmm, maybe that will equalize it?? One can only hope!