The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 99-06 GMT800 Chevy and GMC Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 09-15-2020, 10:53 PM   #1
68c10owner
Registered User
 
68c10owner's Avatar
 
Join Date: Oct 2003
Location: Carmichael, California
Posts: 3,006
wheel/tire specs help needed

Hi guys. Long time member but new to this body style. Picking up a 2000 GMC 1500 2wd extended cab that the previous owner lowered. Im guesing its a 4/6. It still has the stock wheels and tires. Im looking for low cost wheel upgrades. I noticed later model OEM wheels is a popular option and some look great but what specs do I need to look at? I know its a 6x5.5 bolt pattern but thats all I know. Looking at 20" wheels, how wide can I go? What backspacing? And what tire size will fit front and rear? Not looking to go much shorter than a 45 series sidewall. Thanks for the input
Attached Images
 
__________________
Anthony
68c10owner is offline   Reply With Quote
Old 09-16-2020, 09:41 AM   #2
Palf70Step
State of Confusion!

 
Palf70Step's Avatar
 
Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 47,061
Re: wheel/tire specs help needed

Most of the factory rims are 7" wide. I think the 18s or 20s are 8". Figure your current tire combo, height then calculate a tire combo on the other rims that have the same height and you should probably clear OK.

Such as I am guessing you have either 235/75x16 or 255/70x16 which is a hair over 30" tall.
On an 18 inch rim a 255/60 ro 265/60 would keep you in the hair above 30" tall combo.
ON a 20" rim a 255/50 or 265/50 tire would keep you in that range. I do not know of hand what was the factory size tires on the newer 18" or 20" wheels.

I had some Nissan 17"x 7.5" alloy rims on a couple my trucks. They fit well and I was running a 265/65x17 tire which kept it in the same height range.
__________________
Bill
1970 Chevy Custom/10 LWB Fleetside
2010 Toyota Tacoma PreRunner SR5 Double Cab - DD

Member of Louisiana Classic Truck Club (LCTC)

Bill's Gallery
Life isn't tied with a bow, but it's still a gift.
Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!
Palf70Step is offline   Reply With Quote
Old 09-16-2020, 10:20 AM   #3
68c10owner
Registered User
 
68c10owner's Avatar
 
Join Date: Oct 2003
Location: Carmichael, California
Posts: 3,006
Re: wheel/tire specs help needed

Quote:
Originally Posted by Palf70Step View Post
Most of the factory rims are 7" wide. I think the 18s or 20s are 8". Figure your current tire combo, height then calculate a tire combo on the other rims that have the same height and you should probably clear OK.

Such as I am guessing you have either 235/75x16 or 255/70x16 which is a hair over 30" tall.
On an 18 inch rim a 255/60 ro 265/60 would keep you in the hair above 30" tall combo.
ON a 20" rim a 255/50 or 265/50 tire would keep you in that range. I do not know of hand what was the factory size tires on the newer 18" or 20" wheels.

I had some Nissan 17"x 7.5" alloy rims on a couple my trucks. They fit well and I was running a 265/65x17 tire which kept it in the same height range.
Thanks. Didnt even bother to look at the stock size. Its still at my friend's house so I'll check next time I'm over there. I can figure out the height easy enough but I was more worried about getting the correct width and backspacing.
__________________
Anthony
68c10owner is offline   Reply With Quote
Old 09-16-2020, 10:36 AM   #4
Palf70Step
State of Confusion!

 
Palf70Step's Avatar
 
Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 47,061
Re: wheel/tire specs help needed

If you are using stock style rims, you shouldn't have any issues with BS and width.

The white aftermarket wheels (16x8 with 265/70) I had on my 02 I loved, but not sure they would work on a lowered truck.
Attached Images
   
__________________
Bill
1970 Chevy Custom/10 LWB Fleetside
2010 Toyota Tacoma PreRunner SR5 Double Cab - DD

Member of Louisiana Classic Truck Club (LCTC)

Bill's Gallery
Life isn't tied with a bow, but it's still a gift.
Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

Last edited by Palf70Step; 09-16-2020 at 11:00 AM.
Palf70Step is offline   Reply With Quote
Old 09-16-2020, 10:39 AM   #5
68c10owner
Registered User
 
68c10owner's Avatar
 
Join Date: Oct 2003
Location: Carmichael, California
Posts: 3,006
Re: wheel/tire specs help needed

Quote:
Originally Posted by Palf70Step View Post
If you are using stock style rims, you shouldn't have any issues with BS and width.
That actually makes perfect sense and didnt think about that. But I'm not sure if I'm going to use OEM or aftermarket yet. Wheel selection in 6 lug for my taste is pretty limited.
__________________
Anthony
68c10owner is offline   Reply With Quote
Old 09-16-2020, 11:15 AM   #6
Palf70Step
State of Confusion!

 
Palf70Step's Avatar
 
Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 47,061
Re: wheel/tire specs help needed

I know full sized Nissan trucks/SUVs work on GM trucks. Not sure about Toyota or Ferd 6 lug. Biggest thing would probably be the bore size. The Nissan is just big enough, but I think the Toyota might be a little smaller. Just not sure.

I didn't have lowered trucks (too many crappy roads and trails where I drive), but the one thing I didn't care for one the GM 16 and 17" wheels as they were only 7" wide and I wanted a bit more width. I found the Nissan Titan/Armada rims by chance and like them for stock style.
__________________
Bill
1970 Chevy Custom/10 LWB Fleetside
2010 Toyota Tacoma PreRunner SR5 Double Cab - DD

Member of Louisiana Classic Truck Club (LCTC)

Bill's Gallery
Life isn't tied with a bow, but it's still a gift.
Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!
Palf70Step is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 07:27 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com