Originally Posted by pjs
....it will cost them more than the wheels to send him.
They clearly have a lot to loose if you set a precedent - perhaps they know that they've replaced hundreds of wheels, and may have lots of other claims! Tells its own story as to the fitness for purpose of these wheels! You may want to mention this - perhaps ask how many other owners this has happened to - must be a lot to spend so much defending the case etc....
Good luck - as an engineer, my gut feeling, admittedly without having seen the wheels, is that you deserve to win this case (as a professional engineer, I wouldn't normally comment without seeing evidence, but this is the internet...)