17" tire sizes

[Layne02]

Hi, I want to go with 17" wheels on stock 87 GMC Sierra , but not sure what size tire to go with. Truck is stock height , so what do you think would look good for street look as far as being big enough to fill wheel well but not look oversized, pictures would be great. Thanks

 

[87scotty]

35s rub so I'd say 31 or 33s

 

[MikeB]

What tire size are you currently running?

For example a 255-70x15 tire is 29" tall. For the same tire height with a 17" wheel, you'd run 255-60x17 tires.

Also, 235-60x17 is within 0.2" overall height of 235-70x15.

The math is easy to do:
255 x .60 = 153 mm section height
153 / 25.4 = 6.024" section height
6.024 x 2 = 12.048" top+bottom section height
12.048" + 17" = 29.048" overall height

 

[Green79Scottsdale]

I am running 265/75-16 on my stock '79 K20. I could easily move up to a 285 if I wanted. I would say go with 265/70-17 on your truck, as it is a half ton. That is an extremely common size today so new tires are relatively reasonably priced, and readily available anywhere.