Originally Posted by killsurfcity

just changed my gearing last night. i moved from a flat commute to a hilly one and it was just too hard on the knees. i helped build a bike for a friend and set him up with 53x19 and liked it a lot. for some reason i thought i had a 53 tooth ring, turns out it was 52 and i ended up getting a 20t cog for dirt cheap. soooooooo...
did the commute this morning and i'm spinning out like a mother****er! however, it's great on hills and skids/skips are now super easy.
so i guess i'd like something in between. do you all think moving from a 20t cog to a 19 would make much difference? or would 18 be better? the only thing that sucks is with even even gear combos the rear axle is almost out of the dropouts, so if i go with that i might need to get a half link.
anyone ever just made one? it seems like if you just bent it right and put a spacer disk in it would work just as well as the ones they sell.