I think there's something missing in my vocabulary, is gears those things the tyres goes on to? Or is it like "shifting gear" Thoght tires was placed on rimms? Thin ice for me lol.
OOOKAY, I C, WELL MY KNOWLEDGE COMES MORE FORM MATERIAL AND (oops, caps lock) surfaces. As in wich material and productionmethod will give the longest life of an item when its put under a certain ammount of stress.
But hey, why did you remove your original message?