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13 minutes ago, 2018GMC said:

They should be able to tell you what the lift is for each setting. 


If you have someone turn your wheel lock to rock and look at your current tightest clearance with your 2.5” level, you can estimate your minimum lift you need to clear wheel/tire combo.


i have 285/70/17 on a stock GMT900 wheel (about 1” narrower wheel tha stock K2xx wheels) tire comes out to 32.8”. They didn’t rub stock but were close to inner wheel well at full lock and reverse. With the 1.85” lift from 5100s, not even close to rubbing now. 

I am going to try and get some  good measurments done this weekend. 

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