I enjoy riding the Great Orange Monster (aka GOM), but it really is geared too low. I have like 63 gear inches or something silly. It either needs a freewheel on that 21 tooth cog, turning it into a single speed hill climbing machine, or it needs an 18-19 tooth fixed cog. It’s a Surly flip flop hub, meaning I should be able to put one of each on there. Might try to do that. Problem I’m facing with that is that it’s not a track bike, meaning the drops are considered “vertical”. Though they are long drops with a shallow pitch, chain length is a concern.
Coupled with the fact I don’t have any experience with fixies or freewheels or track hubs in general… yeah. It’s got me going to bike mechanics, which I’m never so hot about.
I rode it to work one day last week. My legs are moving so fast it made for a not-pleasant ride – whole body jerking to and fro. Cruising speed is about 9-10mph. When climbing hills though, it’s awesome.
I think we’re all sick of this stupid weather.
So, I bought the 19 tooth fixed gear cog. WAY better. Rode to work with absolutely zero problems.
According to the man, 50/19 gives me 69.2 gear inches, which feels pretty good. Less power, but more speed. I climb most moderate hills with ease (but fucking forget about Lakeview, period). Going downhill doesn’t feel stupid, and my cruising speed is around 16-18mph. My crank arms are 170mm.
But according to the man, gear inches don’t take into consideration crank length which makes a difference in leverage and spin. He recommends the ratio method for measurement instead.
Original: 50/21/170= 4.7 Gear Ratio (more power, less speed)
New: 50/19/170 = 5.2 Gear Ratio (taller, more speed, less power)