factory bias ply tire questions? L78-15 or 820-15 in 67 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**chewychevy67** · 11-12-2012, 09:46 PM

I have a 67 and looking to get a reproduction set of original style tires for my ride? my question is when were L78-15 tires first introduced to trucks. I have been looking at factory photos and it looks like 1964ish was when they replaced the older bias ply tires on 1/2 ton trucks. first pic is L78 -15 and last pic is 820 15 ( i know the trucks would have had a smaller size but this is what i think looks good). I believe both are bias ply.

**chewychevy67** · 11-12-2012, 11:34 PM

Ok i just did more research and in Jan 1967 Goodyear introduced the Custom Superwide Polyglas tires (L78-15). I am just curious if gm would have used these right off the bat on new vehicles produced after Jan 67 or stayed with the older style tires on the trucks? http://www.timetoast.com/timelines/history-of-car-tires

**special-K** · 11-13-2012, 08:01 AM

I believe it was later when L78s were offered on trucks. Quite possibly not until '71...without looking into it.

11-12-2012, 09:46 PM	#1
chewychevy67 Senior Member Join Date: Jan 2010 Location: Here Posts: 5,557	factory bias ply tire questions? L78-15 or 820-15 in 67 I have a 67 and looking to get a reproduction set of original style tires for my ride? my question is when were L78-15 tires first introduced to trucks. I have been looking at factory photos and it looks like 1964ish was when they replaced the older bias ply tires on 1/2 ton trucks. first pic is L78 -15 and last pic is 820 15 ( i know the trucks would have had a smaller size but this is what i think looks good). I believe both are bias ply. Attached Images

11-12-2012, 11:34 PM	#2
chewychevy67 Senior Member Join Date: Jan 2010 Location: Here Posts: 5,557	Re: factory bias ply tire questions? L78-15 or 820-15 in 67 Ok i just did more research and in Jan 1967 Goodyear introduced the Custom Superwide Polyglas tires (L78-15). I am just curious if gm would have used these right off the bat on new vehicles produced after Jan 67 or stayed with the older style tires on the trucks? http://www.timetoast.com/timelines/history-of-car-tires

11-13-2012, 08:01 AM	#3
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: factory bias ply tire questions? L78-15 or 820-15 in 67 I believe it was later when L78s were offered on trucks. Quite possibly not until '71...without looking into it. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~



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