Any mod is required if I go for 275/55/R20 BFGoodrich®: All-Terrain T/A® KO2. Currently my Suburban is having CrossContact LX20 EcoPlus (275/55/R20). I am thinking of about space between front tires and arch. Also is that going to be too noisy and affect the power of the vehicle ?
TIA

 

I ran AT T/A on my old Yukon. Fronts never wore even, even with frequent rotations and front end alignments and would get nosier as they wore. Used the same size as on it and listed on the door sticker.
I was worried about winter traction pulling snowmobiles so I went with them, not anymore. My current Tahoe goes in deep snow just fine with the OE Bridgestone Alenza.
If I was mostly on dirt roads then probably wouldn't have the wear issue.
On my old job the Co. would put all terrain tires all around on the vans instead of just snows on the rears and they wore badly on the fronts of 2 wheel drive vans also. Noisy and cupped edges were the norm across many brands of tires.
No affect on power, highway mileage could suffer a little.

 

So what would be the advice , should I go for BFGoodrich®: All-Terrain T/A® KO2 or go for Michelin - Defender LTX M/S. My usage is going to be mainly highways with occasional off roading and camper trailering.

 

If the Michelin have a less aggressive open tread than the BF I would go with them myself.

 

I am seeing tire information placard attached to the driver's side showing 275/55/20 T if I go for KO2 it will be 275/55/20 S. Basically downgrading from T to S. Will it cause any damage.

 

S and T are the speed ratings of the tire. That you can research. Only a issue if your cruising 90+ mph through no mans land.

 

I believe you will need to run a higher tire pressure even though you are going with the same exact OEM tire size. KO2's are an LT tire, which means they need more air pressure to support the same weight a P-metric tire supports at a lower pressure. There is a calculation that can be done, but its been a long while since I have done it. But if I remember correctly, KO2's in 275-55-20, will need to be inflated to about 55-58 psi to support the weight of my 2007 Tahoe. I could be mistaken, but please so a bit more research, or even contact BFGoodrich customer service.