Anyway, I was able to see what various gain ratios would feel like under foot before buying a rear cog. Most people in the SS world seem to go with a 2:1 ratio - i.e.: a 32/16 or a 36/18 (which are the same gearing, anyway) or 3.8 gain ratio. However, here in SoCal where the hills are steep and often long, I have found more people recommending a 3.4 gain ratio. When it comes to SS, what you gain on the climb, you sacrifice on the flats. It's simple math: you can't have an easy gear going up that's also fast on the flats. So, the 3.4 seems to give me about 16+mph on the flats (in a dead-out spin) and yet let me climb 80% of the hills I encounter. Of course, over time I should be able to clear > 98% of these as my strength and endurance increase, but for now, I can get a darn good workout climbing until I'm about to pass out and then hike-a-bike the rest.
So for me, I've settled on the 32/18 as my gearing of choice for now. I'll be playing around with a 32/17 soon to see if the advantages on the flats can be coped with on the climbs. But regardless of the gearing, I just love SS. For me, it's simple, straightforward, get-out-and-ride fun.
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