Read through this thread if you haven’t already.
3.5" readylift questions
https://r.tapatalk.com/shareLink?share_fid=2034315&share_tid=3237&url=https://5thgenrams.com/community/index.php?threads/3.5"-readylift-questions.3237/&share_type=t
TStevenson works for Ready Lift and and helped answer some questions. I have the 3.21 as well with 35 inch tires and the drop in power was negligible. It still has plenty of get up and go. I do have a pedal commander installed. I came to the realization a while ago that I don’t have a race truck and I prefer the look over the little bit of power I probably lost. For what it’s worth I previously had a 16 with the 3.92 and I’m sure that if you are doing heavy hauling there a big difference but for regular driving I haven’t really noticed a difference in term of response off the line. I would probably prefer the 3.92 if I were to do it over again but I am perfectly content with the 3.21.
For the tires, I think TStevenson mentioned in that thread that once you get into a negative offset you will probably have to go down in tire or you risk rubbing on the fenders. I ended up getting a wheel with +1 and have no issues.
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