Where can I find mountain bike gears?

Question

Alright, you know how the shifter on a bike pulls the track the chain rides on back and forth to shift the gear? Where can I get that? Mine's busted (again) on my late '80s, early '90s Olympia mountain bike.

Answer 1

Bike shop, bike store

Answer 2

You can buy components (individual derailleur and shifter assemblies or grouped sets) off the internet at places like http://www.performancebike.com

Or visit your local bike shop--  They sell components too.

Answer 3

bike shop or online they sell everything online

Answer 4

go to your local bike shop. they can help you.