Folks. that's it for me. Read over 400 threads. Sure I missed some photos and matching descriptions.
Using posts #5, #19, and #24, and links therein, I made the charts at the very bottom of this post. The equivalent diameter tire, using different diameter wheels.
Say it another way, every tire listed in a single the chart is the
same diameter ---25, 26, 27, 28, or 29 (these tall babies are moving into truck tire territory) inches tall. You will notice the
wheel diameter in each chart is 15, 16, 17, or 18 inches (not yet "donk" territory if that's your thing). Next graphic illustrates the idea
Presumably, to make it all work, a backspacing
between 4.0 and 5.0 inches would work most often and therefore be a good place to start planning for.
Higher likelihood that,
without permanent vehicle modifications (or removable stuff like spacers. airshocks, etc), and
after you choose a wheel diameter
and width (11-inch tread width un-inflated), calculate clearances and speedo effects, some combination of wheel & tire on these following charts will "fit" your C-body.
Notice, the word was "likelihood", and not "certainty". Respectfully, plesae take the extra time to plan for your car -- even if it is the same make/model of something you saw on this forum or in person.
Experience has painfully taught me to "measure twice, cut once" as that old saw would apply here too when you wanna move off the OEM "as-built" specs. Heck, if you arent the original owner of your C body, no telling what's been done to/changed on your C over the 43-55 years since it rolled outta the factory.
Obviously, there are really small, tall, skinny sizes listed that most people won't use in ordinary driving. Maybe not so obvious, as section widths get around 275+, aspect ratios get around 50+, that's getting to be BIG, TALL, and/or FAT tire -- moving into a size territory where c
hances of fitment without mods goes down.
Anyway, we haven't seen the last of the questions -- "what's the biggest .. , "what will fit ... Some of us will still roll our eyes at such questions. It's all cool. But if we keep adding real examples with descriptions to this thread and others, it may help us "grow the love" for our beloved C's.
Meantime, I will keep posting pics/info as I run across it, or do stuff to my own cars. Hope a few of you all do too.