I need to replace my Z012 freewheel due to wear on my 12 speed road bike. I can't seem to find a replacement that matches it. The large gear has 28 teeth and the small has 13.
I bought a MF-TZ20 to replace it but the teeth on it are 1/8 in shorter and about 1/3 narrower? The small gear has 14 teeth rather than the 13 on the original. Will this work and if so will it effect the type of chain it will take? I need to change the chain as well.