Junior Member
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Join Date: Feb 2018
Posts: 6
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Junior Member
Join Date: Feb 2018
Posts: 6
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Clearance measurement results upgrading to Falken LT255/80R17s and 5100 lift @ 2.5"
Figured I'd post some crude clearance measurement improvements I got from upgrading to new Wildpeak AT3 LT255/80R17s from worn ~3/16" tread depth Cooper Discoverer AT3s LT265/70R17 and adding Bilstein 5100's @ 2.5" lift.
33.1" is Falken's spec'd diameter for new Wildpeak AT3 LT255/80R17s
31.65" is Cooper's spec'd diameter for new Discover AT3 LT265/70R17s
I measured by simply sticking a tape measure between front skid plate right beside jack point and ground. I measured similarly off the center of the rear diff. I didn't get too techy by checking naunces like tire pressure and whether the gas tank was full, but I'm guessing those naunces are well within the error of my crude way of measuring. I assume tire pressure was around 35-40 psi all around for all measurements.
Front skid plate went from about 8.5" to 12.5" clearance, and the rear diff went from 9.25" to 10.5" clearance. I'd estimate there could be roughly 0.25" error per measurement (0.5" total error in calculating actual lift acheived). Error is simply from eyeballing where the bent tape measure would contact the ground if I wasn't bending it, and from probably not holding it perfectly vertical (as well other nauances like tire pressure and vehicle weight distribution). Also, I'll say that I'd driven the 4R around for about 2 weeks after the shocks were installed, so hopefully they're fully settled by now. Although, given that the 4" difference in front end clearance is more than the difference in tire diameter and Bilstein's advertised 2.5" lift, it's possible they'll settle more. The truck certainly looks level though (w/ 1.5" Daystar spacer in rear). Only other thing to add is that I haven't realigned the front yet, but will that actually change the clearance significantly?
Interesting, I haven't seen a difference in gas mileage driving 65mph on the highway, but that's only after the first drive.
Last edited by Aerodan; 07-09-2020 at 05:11 PM.
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