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18" vs 20" wheel question

robsieb's Avatar
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May 19th, 2010, 9:14 PM   #1  
18" vs 20" wheel question

This will no doubt sound like a stupid question so let the bashing begin. 2010 Sierra Z71 4WD with stock chrome 18's. Wanting to switch to stock machine finished 20's. First off, does anyone see a problem with running the 20's on a Z71 4WD. I see plenty of non-Z71's running them. Second, I noticed that the 20's are .5 inch wider than the 18's, does anyone know if I would need any spacers for this install?

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Vernon, NJ

May 19th, 2010, 11:50 PM   #2  
I ran 20" tahoe wheels on my 05 4x4 Silverado for 3 years without any problems. No spacers

country_09's Avatar
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May 20th, 2010, 10:58 AM   #3  
you can run 20s on that truck no problem just got to find the right tire

ffmed6134's Avatar
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Houston, texas

May 20th, 2010, 11:36 AM   #4  
Tires are more expensive, BFG makes one of the best all-terrains in my opinion, here is my reasoning. I would trade out the 18's for 17's and save some money
LT305/55R20 = $417
LT305/60R18 = $311
LT285/70R17 = $230

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