I substituted these for air tires without any issues. For anyone who has equipment with goat heads or other adverse plant life, I recommend rubber tires for trouble-free tire issues.

my order for a wheel (flat free 10 x 4.5) to replace one that couldn't handle the job (front swivel wheel on a zero-radius riding lawnmower) was handled efficiently and very politely by your staff at darlington, sc. sad to say, on the replacement wheel also, the rubber tire separated from the metal rim. i didn't ask for a refund on the 2 wheels that i bought. i just mis-judged the amount of weight that these wheels could handle. you might want to warn your staff that these wheels, both the type with a solid rim and the type with a two-piece rim proved inadequate to replace the pneumatic wheels that come on the mower.