Originally Posted by
ahultin
Measured the tt of both and the tandem is 56.5 vs the single at 57. I then rechecked seat position in relationship to the bb. The seat on the single was 2.5cm further back so i moved the seat back as far as i thought safe which got them within. 5cm. The reach is pretty close now between the two. The seat to bar drop is is off by 1.5cm so ill pull one of the spacers tomorrow and see how it feels.
The key thing here is get your knee position correct by dropping a plum bob from just under knee cap to peddle spindle at the 3 o clock position the plum bob line should fall center of peddle spindle or slightly behind center a few mm with your but in the proper rideing position on your saddle, I like behind a few mm myself (look on the web for pictures & procedure or the Link below of how to exactly do this correctly and where to put string under knee cap in relation to peddle spindle) When this has been done correctly first then you adjust the stem shorter or longer more or less spacers, what ever is needed here to get your reach right.(NOTE) If you are only adjusting the saddle forward or back without the knee geometry to peddle spindle being right first everything will be wrong..
Link below to a good bike fit procedure...The colorado Cyclist link to bike fit below is real good and explains everything well
http://www.coloradocyclist.com/bikefit/#kneeposition
http://www.jimlangley.net/crank/bikefit.html
Ride Safe,
Bill G