Bicycle Tutor

I have a 6 speed Focus Japanese made Road Bike, with Suntour cyclone 6 speed shifters, derailleurs, and freewheel. Will a 7 speed shimano hg cassette work with the 6 speed components? I have a Shimano HF-RS10
WHEEL HUB TO REPLACE THE WHEEL.

Good you asked some parts just don't like or rather play well with each other. Now from a recent build of a hybrid I can tell you there are a couple things to know about HG (Hyper-Glide) cassettes! I will let you read a little instead of repeating a good article. Here is the link to the late Sheldon Brown's website.
http://sheldonbrown.com/k7.html.
There are a couple more good ole fellas on here that can offer great tips too, just give a little time for them to ring in. .

If the shifters are indexed, then they have to match the number of sprockets and chainrings. 6 speed shifters with 6 sprocket freewheel/cassette etc., so you can't use a 7 speed cassette with a 6 speed shifter, or vise versa.

Thanks for the link. I'll check it out.

(Oct 27, 2012 09:17 AM)xerxes Wrote:  If the shifters are indexed, then they have to match the number of sprockets and chainrings. 6 speed shifters with 6 sprocket freewheel/cassette etc., so you can't use a 7 speed cassette with a 6 speed shifter, or vise versa.

The shifters are not indexed.

First of all why are you planing to do this?? You can get a 7 cog freewheel and not deal with complicated re lacing. Measure frame fit carefully to see if the wider cluster will fit. If its a steel frame you can stretch it a bit. If you have friction non indexed shifter it should work fine once dialed in.

On my ancient P.O.S. 3x6 speed (all early SR Suntour non-indexed components) I test fit another modern 7 speed shimano freehub wheel. The rear derailleur would easily adjust out to cover the 7th cog, the thumb shifter would accommodate it also. The rear drop out spread to 130mm with little effort, no cold setting or fuss required.
That is all I checked, I did not try to ride it.

(Oct 27, 2012 11:48 PM)1FJEF Wrote:  On my ancient P.O.S. 3x6 speed (all early SR Suntour non-indexed components) I test fit another modern 7 speed shimano freehub wheel. The rear derailleur would easily adjust out to cover the 7th cog, the thumb shifter would accommodate it also. The rear drop out spread to 130mm with little effort, no cold setting or fuss required.
That is all I checked, I did not try to ride it.

Thanks, sounds like a good idea.