Join Date: May 2002
Location: Near Portland, OR
Bikes: Three road bikes. Two track bikes.
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The way most people use gear inches, it's just gear ratio multiplied by 27. It's convenient because under the gear inch system, one chainring tooth is roughly two gear inches and one cog tooth is roughly 6 gear inches. This gives someone an easy way of finding approximate gear equivalencies without too much math. So, basically, anyone using "traditional" gear inches (meaning a 50/15 is a 90" gear), is essentially using straight gear ratios.
Good spreadsheet. Rank ordering gears in some way is essential. I've never found the traditional tabular gear charts to be useful. Mine is posted around here somewhere, but I'm told it's too nerd to be seen with in people's gear bag.
Cat 2 Track, Cat 3 Road.
"If you’re new enough [to racing] that you would ask such question, then i would hazard a guess that if you just made up a workout that sounded hard to do, and did it, you’d probably get faster." --the tiniest sprinter