4" lift on stock rims????

Gabe Bunn · January 9, 2020

Anyone have pics of their Sierra or Silverado with 4" lift on factory 20" rims? Also, what size tires are you running and how much MPG did you lose? THANKS

vonrokker · January 9, 2020

Interested as well....

lapoolboy · January 9, 2020

4" ReadyLift with stock wheels/tires.

I can't recommend it though....CV angles are too great resulting in noise and vibration. Mine started immediately after install and is getting worse. ReadyLift says they are within "safe tolerance" but I cannot ignore the noise and rumbling it's doing. I'm taking it off this weekend and ReadyLift is giving me my money back. I'm just putting a set of 2" level struts on it and calling it a day.

lapoolboy · January 9, 2020

I think this is a more widespread problem than they think because most folks just chalk it up to tire noise. I'm on stock Bridgestones so I hear and feel every little thing the truck is doing.

Fltmech · January 9, 2020

2 hours ago, lapoolboy said:

4" ReadyLift with stock wheels/tires.

I can't recommend it though....CV angles are too great resulting in noise and vibration. Mine started immediately after install and is getting worse. ReadyLift says they are within "safe tolerance" but I cannot ignore the noise and rumbling it's doing. I'm taking it off this weekend and ReadyLift is giving me my money back. I'm just putting a set of 2" level struts on it and calling it a day.

2 hours ago, lapoolboy said:

I think this is a more widespread problem than they think because most folks just chalk it up to tire noise. I'm on stock Bridgestones so I hear and feel every little thing the truck is doing.

You also have to wonder why GM would install longer CV axles on their TB/AT4's with the 2' lift?

Edited January 9, 2020 by Fltmech
2" lift. 2' would require seriously long CVs. LOL

lapoolboy · January 9, 2020

2 minutes ago, Fltmech said:

You also have to wonder why GM would install longer CV axles on their TB/AT4's with the 2' lift?

Yep!

Ritchie Brown · January 10, 2020

13 hours ago, lapoolboy said:

4" ReadyLift with stock wheels/tires.

I can't recommend it though....CV angles are too great resulting in noise and vibration. Mine started immediately after install and is getting worse. ReadyLift says they are within "safe tolerance" but I cannot ignore the noise and rumbling it's doing. I'm taking it off this weekend and ReadyLift is giving me my money back. I'm just putting a set of 2" level struts on it and calling it a day.

This is why this is such a great website. I have a 2 inch level and was about to order the 4 inch because your truck looks so good. Thanks for the info.

TXguy · January 10, 2020

I put a Readylift 2” level and swapped out the 2” rear block for a 3” block on my AT4. So I have a total of 4” in the front and 3” in the rear. I have not had any issues with noise or vibrations. Very pleased with it so far.

lapoolboy · January 11, 2020

1 hour ago, TXguy said:

I put a Readylift 2” level and swapped out the 2” rear block for a 3” block on my AT4. So I have a total of 4” in the front and 3” in the rear. I have not had any issues with noise or vibrations. Very pleased with it so far.

Yes, because you already have the longer and/or beefier CV's.

Michael Karp · January 5, 2024

Hey I know im a few years late however I didn't find much when I searched for my build so I figured I would post

2021 Silverado Z71 RST

4in BDS coil over lift

OEM 18in wheels (came with the truck from dealership)

35x12.5x18 Nitto Ridge Grappler Tires

I ran 2in adapters to avoid tie rod interference

ObscureGlock · September 19, 2024

Bumping this topic and will follow up with it in January/February. Just ordered a 2025 RST diesel 4WD, I do not want to do the 6" kits. I am in love with how the ReadyLIFT 4" SST Kit sits so I am going to make it work. After doing extensive research, CV angles are what's messing people up so my solution, based on online research, is upgrading the CV axles to the Trailboss/Z71 CVs which are longer than the normal 4wd CVs. ReadyLIFT makes a 2.75" Lift for Trailboss/AT4 trucks that give the truck a total of 4.5-6" of lift, so if those CVs can do it, I dont see why they can't do it for a 4" lift on a regular 4WD. I cannot confirm yet if this is the fix as the truck was recently ordered and expected to arrive in December. If any other person has gone through this testing of the trailboss CVs, let me know. More to come.