Brain Cell 001
37s Advisor Preview
Rubicon · 4-door · 3.6L V6
Heavy JT overland branch: choose springs, shocks, geometry, steering, and gearing for payload — not just tire clearance.
Matched branches
Matrix package recommendation
• tire-size calibration / programmer
• wheel backspacing or offset validation
• axle gearing review
• spare tire / rear track-bar clearance
• rear brake-line and rear geometry validation
• constant-load spring and shock tuning
• brake performance review
• 37s are a system upgrade: clearance, calibration, gearing, steering, braking, and driveline stress all matter.
• For real trail use, 3.5 inches is the safer default starting point unless a specific exception applies.
• A loaded JT needs springs/shocks selected for real payload, not just lift height.
• actual tire diameter
• wheel backspacing
• wheel offset
