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View Full Version : Whats the widest rim/tire I can use on my 63 Lark?



tstclr
11-13-2005, 03:16 PM
Looking for insight on the widest rim/tire I can use on the rear of my 63 2dr Lark Sedan. Anyone? I'd like to go 15x7 if possible. Also, what offset should I look for?
Thanks
Todd

63 Lark 2dr Sedan

Alan
11-13-2005, 03:54 PM
4 3/4" back space. on those 15" X 7's. With 275 X 60's you will just hardly be able to get your fingers between the tire and the fender and you will have about 1 1/2" to the spring.

oldvinyl
11-13-2005, 08:23 PM
Tub the back end, throw some Thompson sportsmans out back. A dana 60 with 5:13 gears and go out and eat some chevys.What kind of power is under the 63 hood??? Have fun. Tom Nanaimo B.C. Can.

tstclr
11-13-2005, 09:40 PM
Thanks for the info Alan! My hopes are for a built 350 or 327. One of the techs at the GM Store I work at has a well done 350 that he wants to sell. IIRC it ran 12's in a 81 Camaro and he said there was lots of room for improvement with a better set of heads. I may pick it up. I'd really like to go tri-power just for the old-tyme look with finned valve covers etc. I'm looking for that 60's Nostalgia look. Haven't decided to go stick or auto. I'm a long way's away from that step. Right now she's pretty much a solid shell with a 6/auto and trashed interior but we'll get there;) I really don't want to cut her up by tubbing however as she is soooo solid.. I have my 66 Daytona engine mounts and my eye on a Dana 44 with twin-grip. Alan, any idea what the 275/60's would compare to in the old tire sizing, about 10"? The tire I am looking at is 7.75X15...
Todd


63 Lark 2dr Sedan

Dick Steinkamp
11-13-2005, 09:58 PM
quote:Originally posted by tstclr

any idea what the 275/60's would compare to in the old tire sizing, about 10"? The tire I am looking at is 7.75X15...
Todd


The first number in current tire sizing is the width of the tire in millimeters. 275 millimeters = 10.8". The second number is the aspect ratio of the tire width to sidewall height expressed as a percent. 60% of 275 mm = 165 mm or 6.5". The tire is 10.8" wide and the sidewall is 6.5" high. A 7.75 x 15 would cross to a 195 80 15.

-Dick-

Alan
11-13-2005, 11:02 PM
Dick is right on about the sizes but the rim has a lot to do with the tread on the ground and the 10.8 is not the tread with but the tire bulge, with my 275X60x15's on 7" rims there is 10" of tread on the road with 8" rims with a 5 3/4" back space there is almost 10.5 inches of tread on the road and almost no side bulge, but things get mighty tight under there and no passengers.

desertdoc
11-15-2005, 09:26 AM
I just had some 8" cragar smoothies and 215 60 15's set up on for a 64 lark wagon. Discount Tire helped me figure out the setbacks for the wheels. The wheels were reasonable, and the custom work was done in about a week.

prager
11-15-2005, 05:10 PM
Guys, I put 15x7 cragar ss rims with 245 15 60's. They fit just right. The standard backspace on the rim was about perfect. I don't think I could have went too much wider without hitting the fender well.

tstclr
11-15-2005, 10:06 PM
Wes,
Do you know offhand what the offset of those Cragars are?

Todd


63 Lark 2dr Sedan

prager
11-16-2005, 09:23 AM
Todd, they are either 3.75 or 4 inches..I don't remember..But I was told that this was the standard backset on the Cragar 15x7. they fit really well, I don't think I could go much wider than 245 60...maybe 255 at max.