Originally Posted by
delcrossv
Exactly. Gear Inches is equivalent wheel diameter. Development is how far you go in one revolution of the cranks. put a 22 tooth granny on the front and an 11/36 on the back and you'll make it up in 2 hours- in bottom gear.
Europeans do roll-out in meters. Americans do gear inches. Neither has much intuitive meaning until you've ridden a bike with similar gear range and have something to which to compare it.