Will tires rub if downsizing?

Hello everyone, first post here!

I have a 2006 Tundra on RCD lift (6" front, 3.5" rear sitting dead level) with 315/70/17 tires on Eagle Alloy model 114 17" chrome rims (online says the 18" has +10 offset and 5" backspacing). I have zero rubbing in any normal situation (but I don't know what's been cut if much/any). I'm needing to do some towing and I was thinking about going down to a 285/70/17 tire (assuming that small of a decrease will even have a benefit in rolling mass etc). I guess with 285 and 6" front lift will look funny, so I may have to lower the Bilsteins to 4" front (although that's a pain because they have to compress the springs for snap groove change).

My question/concern is will I rub with that tire/rim setup even though I'm not rubbing now? I'm not sure if it's something where as long as it's been trimmed to fit 315's I'm good to go, or if putting the buldge of the tire to a 2" lower spot (315 vs 285) will cause it to hit something new? Can I put on some stock 4Runner/FJ/Taco 17's without rubbing since already fitting 315's?

 

It seems to me a 285/70/17 should fit fine. I'm pretty sure some guys run those tires on a 2.5" front lift. No guarantees on your personal set up.

 

If I understand the question correctly, no I don’t think you will rub with downsizing.
There are only a couple points of contact you would hit with running bigger size tires. I think it’s mudflap, fender, front bumper, and spindle/uca?
Since you already have 315’s and you’re not rubbing, you should be fine to downsize. A wider 285 might get spindle/uca rub, but it looks like you have wheel spacers.

BTW nice truck! I want my truck to look just like yours. Tell me how the subframe lift is?

 

alb1k -Thanks for the reply.
Beefnbread - Thanks. That's what I was thinking also about the rubbing. I didn't think it has spacers (I'll have to check). I got it like it is so not much help for the subframe info other than it was cutout and the RCD setup in its place.

 

This.

That's the size I run with 2" lift. No issues.

 

I'd like to go with the 285 because it opens selection in non A/T tires. My problem is 285 all seasons with this 6/3.5" lift will probably top heavy (looking or even acting).

 

Welcome and greetings from Minnesota. Very nice looking truck. Looks like the guys here have some good advice for you. Not much I can add.

 

Thanks everyone for the replies and helpful info. I'm seeing that 2" lift is about the minimum for running 285's but now I'm wondering (to myself and others) what the "maximum" lift would be on 285 all seasons without looking goofy.

 

Even if you go down to a 4" lift, it may look really goofy if you go with all season/street tires. Why do you not want all terrain tires?

 

My thoughts with wanting all seasons is that it seems like an A/T like my KO2's are too soft and knobby (probably also at 285 size) to provide good mpgs and tread wear. My thoughts were a smaller, harder, smoother tire would help with MPG's, acceleration, wear, and braking etc.