Readylift 3 inch SST Question

[SSE Dad]

I've searched this site in advance but couldn't find exactly what I was looking for. I have a 2023 Z71 Tahoe and am looking at adding the Readylift 3 Inch SST lift. I would like to run the stock 20 inch wheels but add bigger tires without rubbing or trimming ideally. Their website says the following will fit on tire fitment:

285/60R20 +18

295/60R20 on a +12 offset with trimming

The shop I'm working with said the factory wheels have a +28 offset and he said the 285 would work without trimming but I just called Readylift to confirm and they seem to think you would have to trim for anything above a +18 offset so you would have to trim and potentially add spacers for the 285 as well.

Is anyone running this setup with stock wheels and if so, what tires were you able to run and did you have to trim?

 

[jgraves]

I'm not familiar with the lift but several lifts include replacement upper control arms with larger ball joints. Even factory, the upper ball joint is close to the tire sidewall. These kits require reduced offset to maintain clearance between the sidewall and ball joint. The lift companies are likely providing a safe recommendation to maintain the factory clearance and limit their liability.

I'm running 315/70R17 on +18ET on stock suspension for winter. I was very careful checking my tire fitment and it is very close (approx. 5mm less than factory). There are no marks on my sidewalls after 4-5 months but, there is a possibility a bad wheel bearing, sidewall bulge or other minor issue could lead to a cut sidewall and rapid deflation.

285s on stock +28ET wheels and stock UCAs would have less sidewall clearance than stock but more than my winters. They could rub the Readylift UCAs but are likely in that grey zone of clearance under "most" conditions.

LT285/60R20 KO3s measure very close to the OE Goodyears on the AT4. They may not rub w/o a lift on OE wheels but I would recommend a DIY or Westcott Designs fender liner kit. This mod is almost invisible unless you're under the truck, mostly reversible and gains more clearance than a 2-3" lift. Tire clearance is not the only reason to install a lift but don't expect to gain huge clearance with a small lift due to the shape of our fenders.

Jeff

 

[SSE Dad]

I'm not familiar with the lift but several lifts include replacement upper control arms with larger ball joints. Even factory, the upper ball joint is close to the tire sidewall. These kits require reduced offset to maintain clearance between the sidewall and ball joint. The lift companies are likely providing a safe recommendation to maintain the factory clearance and limit their liability.

I'm running 315/70R17 on +18ET on stock suspension for winter. I was very careful checking my tire fitment and it is very close (approx. 5mm less than factory). There are no marks on my sidewalls after 4-5 months but, there is a possibility a bad wheel bearing, sidewall bulge or other minor issue could lead to a cut sidewall and rapid deflation.

285s on stock +28ET wheels and stock UCAs would have less sidewall clearance than stock but more than my winters. They could rub the Readylift UCAs but are likely in that grey zone of clearance under "most" conditions.

LT285/60R20 KO3s measure very close to the OE Goodyears on the AT4. They may not rub w/o a lift on OE wheels but I would recommend a DIY or Westcott Designs fender liner kit. This mod is almost invisible unless you're under the truck, mostly reversible and gains more clearance than a 2-3" lift. Tire clearance is not the only reason to install a lift but don't expect to gain huge clearance with a small lift due to the shape of our fenders.

Jeff

Thanks for the detailed reply, much appreciated!