Originally Posted by
arfer1
Can you direct me to a link or video that explains how to do chain wear measurement with a ruler?
Chain Maintenance
Originally Posted by
arfer1
I've currently got a six speed freewheel. I like it, but I would like more options for hill climbing. What do you think about getting a megarange freewheel?
A megarange
will require a different derailleur, as it has to be capable of handling the larger rear cog and wrapping more chain. We can't tell you if you need a megarange - depends on terrain, load and fitness.
Seven speed may not fit into your bike so that you have enough room between small cog and dropout.