Zone or BDS with stock 20's?

[MBSierra17]

I've searched, and found mixed answers throughout the forums. Looking for something definitive. 

 

Want to run zone or BDS 4 or 4.5 with my stock 20's. 2017, so stamped steel UCA's. Anybody know if this will clear without spacers? Don't want to run spacers, so if that doesn't work, are any other lifts out there that would clear it? 

 

Currently running bilstein 5100 at top setting and 275/60/20. Rubbing the UCA's at full lock, so I want to remedy by dropping the Bilstein to stock height or first setting, and the 4" lift to correct angles. 

[Jon A]

I have the BDS 4" with stock 20's and they fit fine with no spacer.  I have the solid steel UCA's though and I'm not sure the lift will solve your problem.  While the lift will change the angle of the UCA, it might not get you any more clearance.  I think one way or the other, replacing your UCA's is what you're going to need to do if you want to stick with the stock wheels and those tires.

[MBSierra17]

I had the tires on before the shocks without issue, so dropping angles to stock levels should take care of it. 

 

Besides that, wouldn't the knuckle pushing out further grant extra tire clearance at the UCA? 

 

Edit: knuckle would grant more clearance, but also would raise the point of contact which may lose clearance... Regardless, I've confirmed with several members via PM that they're running zone 4.5 stock wheels with stamped steel UCA's and 295 wide tires without rubbing, so my 275 should be OK. 

[AgDoctor]

I had the tires on before the shocks without issue, so dropping angles to stock levels should take care of it. 

 

Besides that, wouldn't the knuckle pushing out further grant extra tire clearance at the UCA? 

 

Edit: knuckle would grant more clearance, but also would raise the point of contact which may lose clearance... Regardless, I've confirmed with several members via PM that they're running zone 4.5 stock wheels with stamped steel UCA's and 295 wide tires without rubbing, so my 275 should be OK. 

 

Your 275's will clear easily. 295's will work as well no troubles. I ordered both 295/60R20's and 35x11.50x20's and went with the 35's because they were about 1/4" taller and 1/4" narrower as well as significantly cheaper.

 

The new knuckles do push the wheel out and with stamped steel and my 11.50 width I have approx 1/4" from tire and UCA contact.

 

The close contact isn't on the sides of the UCA however. The issue is at the little knub or rim on the outer edge of the UCA. I have seen different people grind that down to clear 12.50's, but I wouldn't trust that(and it is still very close after). I saw a Rocky Ridge Apex that was brand new with this mod done but I still wouldn't touch it. If your ball joint comes out bad things will happen.

 

The tire brand that you choose will have a large impact on clearance as well. I have seen that different companies and different styles in the same company have sizes that may or may not be as advertised. For instance BFG seems to always run quite a bit smaller than their advertised size. Most Toyo seem to run true to size(A/T and R/T). Nitto seems to be close but a little on the short side. In my experience if they are shorter, then they are also more narrow(in relation to declared size).

 

I'm assuming you are wanting to run a 12.50, and if you do you can consider a small 8 mm slide on spacer. I found a couple that were even hub centric. I personally don't want a spacer on my front wheels, but many say it's fine.

 

 

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