9 speed vs. 10 speed??? Thoughts?
I'm upgrading an old 1992 Cannondale R600 roadbike from a 7speed drivetrain and can't decide if I should go to a 9 speed or 10 speed set-up. I think the 10 speed set-up would force me to replace the crankset whereas I could keep the stock crankset with a 9er. I will be training in some hilly areas but I'm new to this so I don't know if the extra gearing with the 10 speed set-up is worth it. I know I could probably just spend a few hundred dollars more and purchase a new bike but this one has sentimental value so I would rather build it up rather than buy new.
Also, does anyone happen to know the steerer tube diameter on Cannondale's this old? This one obviously has a threaded stem and fork but I was considering throwing on a carbon fork with a threadless headset but I'm not sure I'm measuring the steerer tube correctly.
Thanks.
YIPES! I would reconsider this move. Let's forget about the compatibility of parts for the moment.
Going from a 7 speed to 8/9/10 requires resetting the rear spacing and realigning the dropouts. This is next to impossible with Cannondale- especially old ones- without cracking the frame or stressing it to the point where you could experience sudden catastrophic failure.
Cannondale frames- especially old ones- tend to have a very limited life to begin with, as cracks frequently form on the frame at various spots... the seat tube/top tube, the chainstay reinforcement, the down tube/headtube are most common. This type of failure is NOT covered under their warranty. They appear as thin scratches- hardly noticable.
Soooo, of course it is up to you, but if you were to come into my shop I wouldn't do it- the liability is just too great.
I have lots of bikes that I wouldn't part with due to sentimental reasons but would give any one of them up to avoid being hurt or killed because of a poorly advised change.
How to install a headset, stem and forks
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