they keep your chain tight
inox or chain lube from a bike shop
a bmx version of a mongoose
No, you can just cut your chain with a chain breaker or just take it to a shop and they will do it for you.
shimano dxr is the best for bmx racing
Haros are the best and damondbacks with small cogs are the best BMX in the world.
No single answer, depends on how much money you want to spend and what kind of riding you want to do.
in my opinion, Perry Kramer is the best bmx racer, he is dead, he also made one of the best bmx bikes ever, the "PK Ripper", google it
www.danscomp.com is the best bmx website
Corey Milne Is the best ever known freestyle Bmx Rider in the World
they can range from 46teeth on a chain wheel all the way down yo a 22tooth chain wheel.
Wethepeople bmx bikes are excellent, probably the best