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I'm a new member and a road cyclyst. Am a 62 male and have two artificial knees. Thru a connection I was virtually given a Trek 5900 Super Light. Had to put a stem extender because I can't bend over fully 'cuz of my knees. Used to have a hybred that was a 9 speed with three rings on the crank. Now I have a 10 speed with just two rings and my problem is the bike is geared way too long, that is the gears are not low enough for my strength and climbing ability.
I have the Shimano Dura-Ace 11-23 on it now and there is a 12-27 in a 10 speed set also available. My question is how much lower a low gear is the difference between the 23 and the 27. In non-technical terms, on my old bike the lowest gear at my comfortable cadence was about 7 mph. The 23 on the 5900 is about 11.5 mph. I can't ride standing very well at all, knees again, so I need a low gear.
I assume if I went to three rings on the crank, I need to go to a 9 speed in the rear which means changing out all the trick stuff on the bike. Can someone give me an approximation of what the difference between the 23 and 27 will really be???
I have the Shimano Dura-Ace 11-23 on it now and there is a 12-27 in a 10 speed set also available. My question is how much lower a low gear is the difference between the 23 and the 27. In non-technical terms, on my old bike the lowest gear at my comfortable cadence was about 7 mph. The 23 on the 5900 is about 11.5 mph. I can't ride standing very well at all, knees again, so I need a low gear.
I assume if I went to three rings on the crank, I need to go to a 9 speed in the rear which means changing out all the trick stuff on the bike. Can someone give me an approximation of what the difference between the 23 and 27 will really be???