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@deleted
84" SS was just about sustainable for me when I first started commuting but conventional wisdom made me change to 66" fixed via 72" fixed. My legs got bloody big though.
I've got into the habit of trying to convince people to shun the fashion for deep V rims because I'm convinced that that extra rim weight is putting extra pressure on the knees at each set of traffic lights.
Anyway...my original question is thus...
Am I doing any damage to myself on flat fast rides (I'm training to start TTing this year) on 84" fixed? I really can't see how. My cadence is getting better...I'm starting to be able to sustain 90ish for a while but not quite for a full 10mi. I do tail off at the end.
I mean, my road bike is geared to 109" and I use that gearing in sprints and downhills. Apart from that, I'm happy spinning away at 80"ish on my road bike for hours on end and nobody tells me I'm killing my knees.