6 Speed Cassette Question

[RunningBehind]

Bike is a Fuji Allegro, with a Sun Tour Mighty-6 rear cluster according to the parts listing I found online.

The chain was completely rusted/stuck to the cassette ring it was on, and chains appear to be cheap online, so I'm replacing that.

If I wanted to replace the cassette as well, how can I tell which six speed cassettes would be compatible? Is that even an issue, or are they all basically the same?

I was looking at this one as an example: Shimano 6-speed

[nfmisso]

First of all, you do not have a Cassette; you have a Freewheel.

If your shifting is not indexed, you can use any 5, 6 or 7 speed freewheel. Personally, I have not had good experience with low end Shimano freewheels, and have had good experience with Sunrace. Both my WT and SR have Sunrace 7 speed 13-25 tooth freewheels.

Personally, if staying 6 speed: I'd go with this one: http://www.amazon.com/Sunrace-Freewheel-14-28T-6-Speed-Silver/dp/B00AMOSU4W/

And if going 7 speed: http://www.amazon.com/SunRace-7-Speed-13-25t-Free-Wheel/dp/B003RLE9X8/

[RunningBehind]

Wonderful! Thank you. I also just found the Sheldon Brown article on the difference between freewheel and cassette.