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Old 10-04-2016, 10:57 AM   #1
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18" v. 20" TV Tires

I have made a deal on a new Duramax LTZ...great looking truck with more options than I need, but the DW will like those. It comes with the 20" wheel & tire option. Had I special ordered it, I would have opted for the 18's for obvious towing reasons. Rustic Eagle also gave me some insight on the two tire sizes which also makes me lean towards the 18's. On the other hand, I feel the 20's would probably be ok because my 5er is at 8000 lbs. dry. I'm sure the 20's will be more expensive to replace. I am considering doing a dealer swap or something to go ahead and get 18's. I would like your input if you have 20's on your tow vehicle and if you are satisfied with them or if you wish you had the 18's.

2016 Chevy LTZ - Duramax/Allison
2008 Eagle 30.5BHS
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Old 10-04-2016, 11:18 AM   #2
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I had 20"s on my 2005 F150 and I have 18"s on my F250 and I think the 18's ride/feel a lot better. Just an opinion.

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Old 10-04-2016, 12:53 PM   #3
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Congrats on the new tv!!!

Tire wise, depending on what style tire you would like for a replacement (hwy vs at or mt) may be more of a price factor than the 18" vs 20". I am currently shopping for a new set of tires for my '13 that has 20" rims, and actually found a few tires that are more for a 275/70/18 (265/70/18 is stock) than the 265/60/20 tires......

Ride wise the 18's would probably be a little "softer" unloaded and aired down a little due to more sidewall.
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Old 10-04-2016, 01:06 PM   #4
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Rubber cost would be my biggest issue with 20" rims. The ride quality will also suffer slightly. I would ask if the dealer would swap out to the 18's.

I thought I would check and see if 20's are more expensive and surprisingly they are the same price on Tirerack. Within 38$ anyway, but the options for 18" tires are better. Way more models available for 18's.
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