I have a 2012 JKUR with PSC crusher flares, RR XHD modular stubby, OR-Fab rear tire carrier(pending), RRoR full skid system(pending) and the PSC Evap skid. I plan to DD the Jeep, wheel 6 or more times a year and take as many road trips as possible. Just got back from some OHV trails in Chippewa national forest.
I am considering running 37s on a 2.5" RK stock mod lift plus a 1" BL, appropriate bump stops and a re-gear. Not sure about the 1" BL as I am still sorting through a variety of threads and builds. I read through the primary how-to thread for 37s on 2.5, https://www.jkowners.com/forum/showthread.php?t=31183
I have not found, or overlooked, a specific note or thread on the necessity of having a better lift for 37s that includes upper and lower control arms. Are these other components of a more complete suspension lift necessary for 37s over 35s?
I've heard that the bigger tires add stress to the transmission. Would that not be alleviated by the appropriate re-gear? For example, gearing to go back to stock RPMs at a given speed and adding overhead gearing to account for additional rotational mass. I would be less concerned about top speed and MPG compared to stress on components.
What might be the priority list of component upgrades/reinforcement for 37s?
Should I consider what I found in the thread linked above as "gospel"?
- "Install front axle sleeves, C gussets, box in lower control arm brackets with skids, and reinforce trackbar bracket on front axle:"
- "Install chromoly front and rear axle shafts"
I will not be beating on this Jeep, I hope, and have no issues backing down from an obstacle. I would go with 35s but I get the impression from other owners that I might regret not starting with 37s. But, it could be I'm just not ready for 37s as a new Jeeper.