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The ISO freewheel thread standard is 1.375" x 24tpi Most freewheels I have encountered have been ISO. Some hubs use "British" threading at 1.370" x 24tpi If you use an ISO freewheel on a British thread, it will work, but you should check there is enough thread engagement to avoid stripping the hub. The trials-oriented retailer TartyBikes suggests 9 thread ...


3

They lock up Pretend just 1 pawl and just 1 tooth. Crank is fixed - left and right chainring spin at same rpm. Hub is fixed - left and right pawl spin at same rpm. The green part is attached to the hub that is attached to the wheel. The teeth are attacked to the cogs that are attached to the chain. Gearing 2:1 left (higher faster) assume 32 ...


2

This is my mental experiment on this. The O.P. states he would install a bigger cog on the left, and a bigger chainring on the right, resulting on a higher (faster) gear ration on right side and a lower(slower) gear ratio on the left. Now, if the freewheel is installed normally (i.e. freewheeling on coast) then this happens: If the freewheel is on the ...


2

Yes, the Park FR-1 (or something compatible) is your friend.


1

There is a technical difference between a cassette and a freewheel. A freewheel contains the ratcheting mechanism while a cassette sits on a freehub which contains the ratcheting mechanism. It clearly says in that toolkit's page "shimano cassette removal tool". The MF-TZ21 is a freewheel. So Park Tool FR-1 is the right tool. They also have excellent ...



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