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8/31/11 5:55am - Original Message: 'Original Spare Wheel Rim and Tyre Size'
Black V 77
Former Member
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Joined: 7/17/2010
Posts: 3

Hi ,
 I was wondering if anyone could help me. My 1977 Corvette does not have a spare wheel, and I need to source the correct size. I have taken a wheel off the car which are 235/65 R15 which are on 15" x 8" rims. However the tyre and rim size is too wide and will not allow the spare wheel cover to be secured properly. My next consideration was to go down a rim size to 15" x 7" and maybe not so wide in tyre width size.I would like to get to what the original was even if it means I have to use a 15" x 6", as it is only the spare? The owners manual only gves the tyre size of GR70R15 which is not enough  info?Please reply?

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8/31/11 7:07am - Reply: 'Re: Original Spare Wheel Rim and Tyre Size'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19458
The proper metric tire size would be 225/60/15. They are a bit snug in the spare carrier, but they will fit with a little adjustment on the carrier attachment bolts. At the front of the carrier, there are two long bolts holding it to the frame, that allow it to swing down. There are nuts on these bolts that keep them tight . Loosen the nuts a little then unscrew the two bolts to make then stick out of the frame farther. You can only go about 1 inch. There are holes in the frame you can look thru to see how much thread is left on the bolts, so you don't go too far, and take the bolts all the way out. Then, tighten the nuts back up. This should give you enough room to install the spare. It will still be a little tight, but it will fit. You will also loosen the single rear bolt, the one with the lock. It has(or should have) a pin in it to keep it from coming all the way out, so you'll know when to stop loosening it.
hth


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