Hi all this is my first real post to the forum, I have a black water FS canyon mountain bike my friends mother had given me to get out of her yard. Me being me I like to take things apart and put them back together. I test drove the bike up and down my street to get back inthe swing of things and tk test out the gears, yeah the gears on the crankset are pretth much shot popped the chain a coiple of times on the test drive a good amount of the teeth are knarled. So my question is what would be a good and cheap upgrade to the same size gears (48-38-28) I looked around on line and I see a few shimino that spark my intrest theyre lighter and they aee the same gears 48-38-28, I know whag I wantto get but the real issue is the bb does not look like it is threaded is is originally a single piece. Would I have to tap new thread into the bb to get some of the 2 piece cranksets in? Sorry if this has been discussed I did try searching for it