Topic: 1978 trans am spacesaver spare tire size and tread stamp?

[stp667]

Hey Hitman, (or anyone else that can help me out.)

I need some help determining what size of wheel came with the 1978 spacesaver spare option.  I am currently looking to buy a whole spacesaver setup if anyone is wanting to sell.  There seems to be some confusion as to whether it is a 14" or a 15" wheel.  I have 15x8 snowflakes on it from the factory as it is a WS-6 / W-72 optioned car.  I am trying to make the trunk presentation factory correct and would like to know.  I am also interested in finding out the correct letters and numbers stamped on the tire itself.  I have seen some pics with L9CU on them.  Are there any other letter/number codes that would be correct?  Thank you in advance to all that can help!!

[jphillips3333]

Would the PHS docs tell you that?  Build sheet?  Mine look stock but they're `79's so that doesn't tell you much.  Someone will be along.

[John Witzke]

All 1978 Norwood OH produced cars space saver spares should have L9CU stamped on them while Van Nuys cars should have L9C4 stamped on them.

[78w72]

phs doc's actually list the sizes of the available spares.   i can check mine if no one else chimes in with a size. 

[stp667]

Why didn't I look there before?   I never remembered it sying anything about the spare.  Yes, build sheet states M55 space svr spr OGR 2.2? x 15 WH/LE.  Car is from the Norwood, Ohio plant.  I now know that I am looking for a 15" L9CU.  Thank you guys!!!