2020 AT4 larger tires...stock rims

[calgator73]

Looking at Grabber A/TX LT305/55R20 on stock rims (20x9)....

 

65lbs 8.5-11" 9.5" 12.4" 10.6" 33.2" 626

 

Compared to factory size

 

40 lbs 7.5-9.5" 8" 11" 8.6" 33" 633

 

biggest concerns are of course...will it fit?  And what about the unsprung weight?  Anyone try this and have to pursue other upgrades to try and make it right?

[jbr1888]

Read this: https://wheelsasap.com/gmc-at4-oversized-tire-trimming-guide/

 

 

 

[Gangly]

This is about three topics below yours on the main page.  45 pages of information, lemme help you though.....

 

 

Edited August 20, 2021 by Gangly

[Amcguy1970]

Nearly 1,200 posts and doesn't search if it will fit; so will it fit is covered in about 1,200 other threads. As far as un-sprung weight, that is a lot to add and the impact will be the same on every vehicle that heavier tires are add to from Miata's to F450's; longer braking, slower acceleration, worse mpg, worse ride, etc. 

 

Tyler

[calgator73]

On 8/19/2021 at 3:05 PM, Gangly said:

This is about three topics below yours on the main page.  45 pages of information, lemme help you though.....

 

 

I saw the same posts....but not this size.  A 305-55-20 is a 33x12.40.  Not finding too much info on that.  Thanks though..

[calgator73]

On 8/19/2021 at 10:15 AM, jbr1888 said:

Read this: https://wheelsasap.com/gmc-at4-oversized-tire-trimming-guide/

 

 

 

Didn't see this...but it seems to be focused on aftermarket wheel/tire combos.

[calgator73]

23 hours ago, Amcguy1970 said:

Nearly 1,200 posts and doesn't search if it will fit; so will it fit is covered in about 1,200 other threads. As far as un-sprung weight, that is a lot to add and the impact will be the same on every vehicle that heavier tires are add to from Miata's to F450's; longer braking, slower acceleration, worse mpg, worse ride, etc. 

 

Tyler

Yeah...I get it...assume I didn't search lol   I did.  Everyone seems focused on 35s and aftermarket wheels.

[calgator73]

I did find this...guess it kind of answers part of the question.