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-   -   Tires Size for 70 K20 (https://67-72chevytrucks.com/vboard/showthread.php?t=735007)

HeavyChevy70 04-09-2017 08:04 AM

Tires Size for 70 K20
 
I'm trying to decide what size tires to put on my 70 K20 project. I bought a set of 5 16 inch steel wheels last year and want to replace the 16.5/33/12.50s on my truck. Last year, I saw some different tires on 67-72 trucks at some truck shows. Here are the three tire sizes that I saw: 235/85/R16, 255/85/R16 and 285/75/R16. Any suggestions would be helpful as I am going to look at tires this week.

Joesjunk 04-09-2017 09:10 AM

Re: Tires Size for 70 K20
 
Quote:

Originally Posted by HeavyChevy70 (Post 7910441)
I'm trying to decide what size tires to put on my 70 K20 project. I bought a set of 5 16 inch steel wheels last year and want to replace the 16.5/33/12.50s on my truck. Last year, I saw some different tires on 67-72 trucks at some truck shows. Here are the three tire sizes that I saw: 235/85/R16, 255/85/R16 and 285/75/R16. Any suggestions would be helpful as I am going to look at tires this week.

If you have a stock truck with no lift I think the 265/75/16 looks good. The 235/85/16 is the same height just a little skinnier.

jocko 04-09-2017 10:20 AM

Re: Tires Size for 70 K20
 
1 Attachment(s)
agree with Joe, both of the sizes he mentioned look nice on a K20. Here are 235/85/16s on my 72 - I'd love to see a 265/75/16 on stock steel rims for side-by-side comparison. I have seen them in person and liked them (the 265s) but not side by side with the skinnies.

Sicklajoie 04-09-2017 10:20 AM

Re: Tires Size for 70 K20
 
1 Attachment(s)
^^^I agree. I've got 265/75/16 on mine also.

B. W. 04-09-2017 10:21 AM

Re: Tires Size for 70 K20
 
I like tall & skinny! 235/85 or 255/85

jocko 04-09-2017 10:29 AM

Re: Tires Size for 70 K20
 
thx sicklajoie! I forgot that's what you had. They look great. Hmmmmm.......
Anyone got a pic of a 255/85? I don't see many of those very often.

skrenly 04-09-2017 10:36 AM

Re: Tires Size for 70 K20
 
245/75/16 works for me if you like the stock look.

Stocker 04-09-2017 03:37 PM

Re: Tires Size for 70 K20
 
Last year I replaced my 33/12.50-16.5s with 255/85-16s on 7" Ford wheels. About 1" taller than OEM 7.50-16s.

Before:
http://67-72chevytrucks.com/vboard/a...1&d=1465915948


After:
http://67-72chevytrucks.com/vboard/a...1&d=1465879810

1972RedNeck 04-09-2017 04:06 PM

Re: Tires Size for 70 K20
 
Quote:

Originally Posted by B. W. (Post 7910540)
I like tall & skinny! 235/85 or 255/85

^ This - although I would recommend 7.50R16 or 8.25R16.

HeavyChevy70 04-09-2017 04:45 PM

Re: Tires Size for 70 K20
 
1 Attachment(s)
Here is the truck that I saw with the 235/85/16s this past summer.

jocko 04-09-2017 06:45 PM

Re: Tires Size for 70 K20
 
Quote:

Originally Posted by HeavyChevy70 (Post 7910821)
Here is the truck that I saw with the 235/85/16s this past summer.

Holy crap, there should be a thread on that truck!! Nice looking rig.

Joesjunk 04-09-2017 07:15 PM

Re: Tires Size for 70 K20
 
Quote:

Originally Posted by jocko (Post 7910940)
holy crap, there should be a thread on that truck!! Nice looking rig.

x2!!!

52napco 04-09-2017 09:52 PM

Re: Tires Size for 70 K20
 
1 Attachment(s)
255/85r16 on 16x7

CG 04-09-2017 09:59 PM

Re: Tires Size for 70 K20
 
Steel wheels look so nice. If wouldn't have found the 16.5 tires for my mags that was my next choice.

Sicklajoie I just reread the thread on your truck (again) such a great ride.

jocko 04-09-2017 10:20 PM

Re: Tires Size for 70 K20
 
has anyone run 285/75/16s with stock ride height? if so, pics pls:)

Joesjunk 04-09-2017 10:43 PM

Re: Tires Size for 70 K20
 
1 Attachment(s)
285/75/16 on ford 16x7 wheels.

El Dorado Jim 04-09-2017 11:19 PM

Re: Tires Size for 70 K20
 
Quote:

Originally Posted by CG (Post 7911157)
Steel wheels look so nice. If wouldn't have found the 16.5 tires for my mags that was my next choice.

Sicklajoie I just reread the thread on your truck (again) such a great ride.

what 16.5 tires did you find, I just took my 16.5 wheels off my 72 because I cant find any 33" tires for them

allchevy58 04-09-2017 11:53 PM

Re: Tires Size for 70 K20
 
Quote:

Originally Posted by jocko (Post 7911185)
has anyone run 285/75/16s with stock ride height? if so, pics pls:)

I tried 285/75-16 on 8 X 16 wheels and they rubbed when turning, put 265/75-16 with no rubbing. I thought the the 285's looked better but I didn't want to add a lift or helper spring.

special-K 04-10-2017 08:00 AM

Re: Tires Size for 70 K20
 
If you are looking for a stock look, which you didn't mention, you would want 235/85-16s. They are the closest profile to the old 7.50-16s. If you are used to looking at bigger tires you'll want either 285/75-16 for tall with some beef...about same height/couple inches less width than 33/12.50s, or if you want to go closer to stock width go with 255/85s...about same height/around an inch wider than stock. All these tires will work on stock height mounted on a 6-7" rim. 7" is better for those sizes. What width wheels did you get, stock?

CG 04-12-2017 02:41 AM

Re: Tires Size for 70 K20
 
I tried to find some of those 16x7 Ford wheels for my last K20 and couldn't find a set around here. Ended up getting 16X8 from Summit (wheel Vintique). I have no use for the 16X7's now but if I stumbled across a set I would snatch them up anyway, just so I wouldn't feel defeated haha.

HeavyChevy70 04-26-2017 07:12 PM

Re: Tires Size for 70 K20
 
I picked up two 8 lug rims with 245/75/R16 tires on them for $20. One will be a spare when I get new tires for the steel wheels in the future. I plan to put both of them on the rear axle and hope to get some used tires for my steel rims and get rid of all four 16.5/12.50/33s that are dry rotted. I hope to start the body work next month and will get brand new tires whenever my truck is road ready. I have some engine work to do but it is a project that is my #2 project. My other project is a vintage semi truck. Thanks for the tire size suggestions.

jocko 04-26-2017 07:27 PM

Re: Tires Size for 70 K20
 
Quote:

Originally Posted by Joesjunk (Post 7911214)
285/75/16 on ford 16x7 wheels.

Quote:

Originally Posted by allchevy58 (Post 7911314)
I tried 285/75-16 on 8 X 16 wheels and they rubbed when turning, put 265/75-16 with no rubbing. I thought the the 285's looked better but I didn't want to add a lift or helper spring.

Thanks Joe/Allchev!

Joe, that looks like stock ride height - any rubbin issues or really close, etc?

I may lean backwards a little narrower just in case based on Allchev's note. It will be a while before I wear out my 235s, but one wants to be prepared ;)

Joesjunk 04-26-2017 08:44 PM

Re: Tires Size for 70 K20
 
Quote:

Originally Posted by jocko (Post 7926670)
Thanks Joe/Allchev!

Joe, that looks like stock ride height - any rubbin issues or really close, etc?

I may lean backwards a little narrower just in case based on Allchev's note. It will be a while before I wear out my 235s, but one wants to be prepared ;)

It sure looked stock, and they were close, but didn't rub. They truck sat really good, so maybe the springs had been replace at one time? I tried these same wheels and tires on a bone stock 72 K/20 suburban and they rubbed on it.

special-K 04-26-2017 09:08 PM

Re: Tires Size for 70 K20
 
My '72 K2500 had 255/85-16s on 7" Accurides with old original springs that left about 1" to the bump stops and never had them rub. I have a picture as my phone screen saver but it was in my old computer that broke

jocko 04-26-2017 09:11 PM

Re: Tires Size for 70 K20
 
Got it Joe, thanks. I might go one size skinnier then. Sorry Heavychevy, didn't mean to hijack.


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