wrote in message
ups.com...
My tractor originally came with 15x6.00-6 and 20x10.00-8 tires. Can I
use a different size tire on the original wheel. Say a 15x5.00-6 on
the front for example?
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Probably depends on two things.
1. You can not use a tire with a different rim size. It must fit the rim.
2. As far as the sidewall hieght and tread, it depends on the clearance
available.

Why not ask the manufacturer and / or a tire dealership?