2012-04-07 Sat 8am - Bournemouth - (The 100 Club)

Ok I have been a little confused as to what this GI is all about so i looked it up.

Found this:

where
gi = gear inchesdwd = drive wheel diameter (for a 700 wheel its calculated to be 27')fct = number of front chainring teethrct = number of rear sprocket teethRaymond you were pulling a GI of 79.19 I think a 16t on the back should be good for you! This would get you down to a 74.25 which should be good over those hills!
You had 44t front and 15t back right!?!

Ed, an 18t would get him don to 66, he would spin out.
I have 48/17 so 76.24, I thind it a good gear, works well all round and not too tricky to stop, especially not with the help of the odd herge or a bit of off roading ;)

Just quickly while I'm here:

In my experience virtually all club riders who use single gear ride some where in the range 65-70". I'm talking about commuting, club runs etc., not racing. My clubmate Paul Holdsworth seems to be able to maintain a steady 20 -22mph on his 69" gear - which is a great deal better than I can do.

Incidentally, who started referring to 'gear inches'? (of course I know it wasn't anyone on this thread, or even this forum). They are just inches the same as any other sort of inch.