Well, as a relatively new regular cyclist and neophyte mechanic, I am a little proud of a recent accomplishment. When I had my new wheel built recently, the shop had a 12-21 7-speed cassette in stock so I told them to use it even though it was not exactly what I wanted. I really wanted something with 1-tooth steps, since I figured it would be easier to work with in my current program to increase cadence. There really is no such cog. So I ordered a 14-32 from Bike Nashbar for $17.95, disassembled both cassettes and built a 14,15,16,17,18,19,21. I love it! Using my 38 chainring, each step is about 4 chain inches, almost imperceptible going from 19-18-17-16 where I am working on building cadence in the 85-90 range. Now, these gears and cadence may not be impressive to you guys who can push 52-12 120 all day long, but it is where I am right now. When I get to the point where the 14 is holding me back, I will put the 12 and 13 back on and make a more suitable combination. In the meanwhile, spending this 20-30 bucks (hand to get a chain whip and freewheel remover, too) allowed me to get by with my 7 speed shifter and rear derailleur for now. It also gave me a little more experience and confidence working on my bike.
For you experienced guys, is there anything I should double check to make sure this setup is OK?
Thanks,
Raymond