Join Date: Nov 2010
Location: Central CT
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275/65/18 = Ø32.075" x 10.8" wide x 7.037" sidewall height.
275/55/20 = Ø31.909" x 10.8" wide x 5.955" sidewall height.
Honestly they are so close you probably wouldn't notice a difference. The 20's obviously will have the shorter "more stable" sidewall, but the TRD package with the Bilstein's will have stiffer shocks, I'd be its pretty close to cancelling out when it comes to ride and stability. Most effective upgrade you could do to either truck would be to get a stiffer sidewall tire if you're really worried about what you're towing.
What are you towing?
New EnglandTundra Club Member #10
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2019 Ram 1500 Laramie Crew Cab
Hemi eTorque 4x4
12" Uconnect, Air Ride, Pano Roof
Dearly Missed: 2010 Toyota Tundra DC 5.7l, TRD Off Road, 4WD Silver Sky Metallic
Front only Bilstein 5100's at top setting
TRD Rock Warrior Wheels LT 285/70R17E BFGoodrich All Terrain T/A KO2's
Last edited by riccnick; 02-15-2018 at 04:19 PM.
Reason: I got the sidewall heights backwards....