Screw-on freewheels, etc

[3narf]

Hello

Are freewheels a standard fit?

Also, can any jockey wheels be used to replace the ones on my Sachs/Huret mech?

Thanks, novice roadie

 

[PpPete]

The threading for old-school freewheels is standard 1.37 x 24 (IIRC) but note modern cassette hubs are quite different.

Replacing freewheels the biggest challenge is always getting the old one off. You need the right tool (and there are multiple types) and lots of leverage.... 6 ft scaffold bar nearly always sufficient.

 

[tyred]

If you can't find the correct tool, use a hammer and punch/chisel to knock it around.

There is also a French thread but it's most unlikely that you have one of those.

 

[3narf]

So, I use a chain whip and a lock-ring tool?

Thanks for info.

 

[Davidc]

So, I use a chain whip and a lock-ring tool?

Thanks for info.

No.

A Freewheel key and a lot of brute force.

If it's old and solidly on you're going to have difficulty. It's not like a modern freehub and cassette.

 

[PpPete]

Chain whips & lock-ring tools are for modern cassette wheels. Hold sprockets still with the the chainwheel while unwinding the cassette lockring. The cassette itself can then be lifted off the splines.

For a freewheel you need the matching tool: 2 prong, 4 prong, Shimano spline, Maillard spline or whatever, which fits in the centre of the freewheel - secured by nut or QR. It turns the "body" of the freewheel w.r.t. the wheel without the sprockets spinning.

Understand the difference.

 

[3narf]

Right, got it. Thanks.

 

[Banjo]

I couldnt get one of an old Appollo I had guy in the bike shop put the tool in the vice and gently worked away turning the wheel rim until the freewheel cassette span off.