Originally Posted by
trailangel
It's really pointless to talk about rear cogs and spacing etc., without knowing the front chainset.
If someone says they want a certain rear cassette configuration.. they must have done their homework and know what gear inch they prefer.
I would buy from internet, 2 different cassettes to take apart and come up with one that has the GI you want.
If you are happy with your 50/34, so be it. Many are not. I would take that combo straight to the dumbster.
You don't need even spacing/ratio between all gear changes.. only the scientific bicycle mind needs to have all his gear changes the same ratio in order to sleep at night.
It's on a 53-39. I like spinning,when the wind is blowing(most of the time) jumping between two gears every time the road slants up or down is a pain when one gear is too easy and one is two hard. IMO jumping between 15-17 on the big chain ring makes for a ridiculous jump. For those on a compact perhaps a 12-25 is fine, not for me when their are better options.