How long do 20s last for?
 

I am debating on whether to get 19s or 20s. I was if I get 20s it'd wear out fast because I drive 20K+ miles / yr. But I heard from some people that their 20s have gone 20K and still have 50% tread left. Are you guys experiencing the same? How long do your 20" tires last? Thx.

Regardless of size you'll have to pay attention to the wear rating for the specific tire you want to buy.. Each tire has a wear rating that will indicate how long the tire will last. Look at the Tire Rack website for info about it.
Rim size does not matter in regards to tire longevity.

i don't see one reason why with 20s the tires will wear out faster. even if you lower the car, with 20s it probably means you don't have to lower the car as much, which will help on camber

anyway you know my mileage already, 15k miles on pzero nero and it's at 50%. pzero nero is rated 280 tread wear. i am on michelin a/s now with 400 tread wear, so we will see, probably will hear from me in a WHILE ;)

I can usually squeeze 18k to 20k out of the tires. Depends on the inner treadwear. The Toyo T1-R I have now seem to be wearing very well

hey guys i have Nitto Nt555 245 35 20 front and 275 30 20 ....what are these rated ? i hope they last atleast a year ......also how often should I get an alignment done ?

nt555 is not max perforamnce, i think they have pretty high tread wear, if driven correctly i think 25 to 30k might be doable. alignment? depends on whether you hit something or not. once a yr is normal

Like the others have said, 19's or 20's doesn't matter its the tire brand you use that will determine it and how low you have you car for camber reasons. Like rom said 20's dropped will actually help more cuz you don't have to lower the car as much to achieve the same stance as you would with 19's.

Depends 100% on the tire....ive had 17's wear out at 8000 miles, hell, i've had 13" tires wear out at 3000 miles.

My Nitteo's lasted 18K