Originally Posted by
Cheseldine

I appear to be wrong, it looks like the largest is a 21T, not a 24 as I had originally thought.
By my count I've actually got a 13, 15, 16, 17, 19, and 21T freewheel. No wonder that hill climb was rough.
Well, you will probably notice a lot of difference if you get a 28T for the low gear! Especially if you can also add the 39T small chainring.
I used to ride a 14-21 5 speed and then eventually moved to a narrow 6 with 13-24 and more recently to a 13-26 7 speed. That helps keep a cadence on climbs!
Otto