Originally Posted by
Asystole
I have a question since we are talking about Gates rings.
Is it possible to run the 60t Gates rings on a tandem if the frame has a longer boom tube length?
By going from a 69t to a 60t what would be the difference in length from C to C?
Is there any disadvantage to running the smaller rings?
Thank you for an answer to my question.
Late response to the above question, but since it remained unanswered let me try to provide a SWAG.
Reference the following for ring and belt sizes available:
http://www.carbondrivesystems.com/do...Aug2012_sm.pdf
The tandem rings & 2000mm belt are 8mm pitch (tooth/belt nub size), whereas the single bike pitch is 11mm. Simply divide the belt length by the number of teeth (nubs) and you get the pitch. So you cannot mix and match rings and belts from single and tandem products.
My new question:
I would like to hear from some math whizes if it is possible to use a combination of the smaller single bike rings (5 arm, 130mm BCD) and single belts listed in the pdf above, to achieve the same "chainstay" (bottom tube) length as the gear designated for tandems. I am looking for an equivalent setup for a 71.5-72cm bottom tube length. I was unable to use the Gates calculator (
http://www.carbondrivesystems.com/fo...rs.php?lang=us) to find the answer.
Any takers?