Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  

Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Thread Tools Search this Thread
Old 09-23-11, 10:41 PM   #1
everything must go
Thread Starter
Mr. DNA's Avatar
Join Date: Jan 2004
Location: Kelowna, BC, Canada
Posts: 30
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Upgrading 94 Norco Bigfoot frankenbike with old SunTour components

Hi all,
I bought a (94-ish) Norco Bigfoot to use as a winter bike, and also to sort of experiment on. I thought it would be fun to buy an old bike with a solid rustless frame and kind of play around with some low level upgrades here and there, just to teach myself some basic bicycle mechanics.
When I got home and had some time on the internet to try to figure out exactly what year of bike I had, and what the component specs were, I realized that a lot of the stock components had been swapped out with vintage SunTour components from the 70's.
Now, I actually think this is kind of cool - the components look to be practically brand new and they work beautifully. Friction shifters (SunTour Mighty Shifter, I think, which was their cheapest), GT rear deraileur, and a 5 speed freewheel. Also SunTour front der, but i can't remember which model off the top of my head.
I'm thinking I'll keep the friction shifters and derailleurs, but I'm wondering about that 5 speed freewheel. This type of bike never came with anything smaller than a 7 speed (cassette, I think) which makes me think that the 5 speed must be too small for the frame? I wouldn't mind upgrading to a 6 or 7 speed, but from what I've read (on forums like this) the size difference from a 5 to a 7 is prohibitive. But as far as I can tell the original bike should have come with a stock 7 speed. Am I out to lunch or should it be easy to re-upgrade?
I guess my question is - should I leave well enough alone, or should I drop in a new freewheel. If so, anything I should know when looking at a replacement? (Such as which models work well with the SunTour GT rear der, which speed I should get, what should I do or not do as I'm switching it out etc). I'd like to be able to put a new one in without having to monkey around with the frame too much.
As an aside, I could swear that the guy I bought this from had no idea that there were replacement parts. But who other than someone with a particular fondness for vintage bikes would downgrade from indexed shifting, 7 speed cassette to friction shifting 5 speed.
Mr. DNA is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -6. The time now is 12:28 AM.

  • Ask a Question
    get answers from real people!
Click to start entering your question.