Gear charts are ready for printing, and thanks to a VERY generous donation from Steve (definately deserves a trophie!) we now have a laminating machine at our disposal. I’ll be making a few up for the wednesday ride - let me know if you want one or two.
“Front Side” is a Gear/Cadence/Speed chart. Use it to determine which gear you’ll need…
Then flip it over and browse all the chainring/sprocket combos that will give you the desired gear ratio. If you have a gear already, find which chain line is closest and then trace it to find which combinations will fit into your dropouts (most drops will allow one blue line in either direction - but I’m still yet to properly verify):
I’m using a rollout of 2.097m per revolution. That pretty much matches all 700x23-28c, since as the size increases, the pressure decreases. If you have a special requirement, I could potentially make up a ‘special issue’ custom rollout card for you. Or you could roll your own from the source files at: http://undershorts.org/espresso/gc/
stack of cards arrived today just in time for insert shameless plug HERE the global gutz alley cat.
will distribute among the fixies who show up tomorrow nite, there providing one more good reason to come and support my efforts to get Brisbane racing.