single chainring to double/triple chainring on a hybrid
i bought a hybrid bike about 2 years ago, back when i didn't really know what i wanted from a bike... it has a single 42 chainring in the front and a six-speed 14-34 cassette in the back, so basically it's a six-speed bike. i was considering taking it on a longer tour, fairly hilly, though not too steep, and i was wondering how easy would it be to replace the single 42 chainring with a double (or triple) one? what would i need to install apart from the chainset and front derailleur? would it be possible to leave the six-speed cassette as is? (i'm on a fairly limited budget so i don't want to go too crazy with the changes
thanks in advance
You might find that a complete crankset is cheaper than chainrings, assuming 2 & 3 rings can even be fitted to your existing cranks. You will need chainrings/crankset, front deraileur, front shifter & cable, chain and unfortunately I suspect cassette and rear deraileur as nothing modern supports a 2x6 or 3x6 that I'm aware. (7 is the minimum.)
Actually, I would suggest that you buy a complete take-off driveline from eBay, Local Bike Shop, etc. If you don't get a complete package you will have to do some detective work to make sure you have compatible parts, and I highly suspect you'll be breaking the chain and adjusting the length by hand.
I'm new around here, but perhaps there are technical/mechanical discussion forums where you can find details about this. Your proposed change isn't that different from a mountainbiker who wants to go from 3x8 to 3x9 or 2x10, and I'm sure people do that.