Gear Set?
 

hey tiny will you sell gear sets in the future

Yes, should be in stock tomorrow in fact!

I've seen those things, they come in a package of 3 i think right?
what excactly would they improve?
I'm guessing speed...

check this link out I think it'll help you understand and give some pointers too.
Gear Page

Correct, they let you change the gear ratio so you can choose between acceleration and speed. They are now in stock:

http://tinyrc.com/shop/product.php?pid=149

ok cool, I think I'll buy a pack...
Tiny, do you ship to Canada?

[tT]Skyline, we certainly do, you've got mail. :)