Quote from larry on May 4th, 2009, 9:55pm:... I ride to work over a set of easy rolling hills, along Bowen from Sublett to Mayfield in Arlington. Normally I keep the front gear on the middle and just use the back ones, 6 or 7 of them on most days.
So what is the optimum pattern for using the gears? When would I do well to switch the front gear?
Larry
May I suggest that there isn't an "optimum pattern" as such, simply because it's dependent upon the terrain your encountering at the time, and your particular ability to keep the pedals spinning... But for the situation you describe, you're doing the right thing by staying in the middle ring! If you can keep your pedal rotation up and avoid "mashing" too much, you're fine. I have an EZ1, and the 20" wheels naturally give you a somewhat lower "gear-inch" range for climbing, although the bike is heavy.
The "cross-chain" wear issue, where you're in the gear extremes (big ring up front, big ring in back, or vice versa) is really more of a problem on DF bikes, with their "standard length" chain -- there is about 18" of center-to-center distance between front and back gears on a DF, but you've got almost 2.5 X that distance, so the relative angle of the chain is reduced.
If, while climbing, you find yourself staying in the largest rear gears for what seems to be a significant amount of time, and you occasionally have to mash at the low end while climbing, feel free to shift into the "granny" gear up front for that section -- you'll essentially gain an extra two lower gears (just watch that your chain doesn't drop off the gear to the inside -- check your derailleur limit screw setting). And same with the opposite scenario -- if you're always in 7 or 8 on a flat or downhill section, shift to the big ring if you like! But personally, I wouldn't worry too much about "optimum" or cross-chaining wear...
It's really a personal preference, tied to how adept you feel at shifting the front chainring -- because to shift to the granny while climbing requires you to slightly reduce your pedaling pressure to allow the chain to release from the larger gear. So stay in the middle ring, and be happy!