Originally Posted by
Eulers
Hi. Am in the initial stages of my planning effort to modernize the drivetrain of my 1996 Cannondale Los Dos Tandem. .......
Why? What benefits do expect?
On our T50, we went from the original 3 x 7 to a 3 x 9 because:
* the rims split along the brake track.
* neither I nor the LBS could get the Sun Tour cassette of the Sansin hub. The LBS broke two chain whips trying. I don't think that the original owner ever took it apart and that it was not adequately greased originally.
Benefits: wider range across each chain ring; and slight closer ratio spacing.
I used a Wheelmaster 135mm tandem hub with a 2mm precision shim (washer style) on each side. The Wheelmaste hub has a 15mm axle, with 10mm nubs on each side that slide into standard drop outs. It's construction is very similar to Phil Wood's. It is available in 36H, 40H and 48H. Might be in 32H too - I have looked. It has an 8/9/10 speed steel freehub - which I believe works with 11 speed road cassettes - but not positive.
We did not change the 28-44-54 chain rings. The rear went from 12-28 to 11-34. 12-36 might have been a better choice. Since then I got a 26T granny.