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Marathon Plus will kill any ride and trimming rotating mass has the best cost/benefit ratio.
I understand your reasoning behind gearing-up, but surely what you gain downhill you lose uphill?
If your mate has gears and you're fixed, you're never going to be equally matched.
I still think you should get your knee looked at: there is some underlying cause of the pain, which riding fixed doesn't exacerbate, but neither is it going to cure.
Scilly.Suffolk-
Ironically, gearing up has made hills easier for me. I don't know if this is because my previous fixed frames have been bendy (Pearson and pompino) or a combination with the omniums.
I have just bought a 19t of a forum-er. So when it arrives sometime next week I'll give it a bash to see if a 2 tooth makes a difference.
In regards to my mate...he'll have to wait or do round robins.
I was just thinking of n+1 for a longer new commute over Bradford / Keighley way. I like the All City frame but from what I gather on here - lighter nimbler bikes seem fun.
bluebikerider
The wheels I bought off here are phil hubs on mavic rims so pretty light. I think I'll change the tyres over from the very heavy (but bullet proof) M+ to see if it makes a difference, thanks.