|Tandem Crankset Question||MrCelloBoy|
Apr 20, 2001 9:29 AM
|I'm spec'ing my dream tandem and I've got a crankset question.
Most upscale tandems are shipping with Ultegra Triples or Dura Ace doubles. They both (I think) have a 130mm bolt pattern.
There's another system made by TA that has the advantage of a wider range of crank lengths, but its bolt pattern is 110mm. The TA also has a solid (old style, squared) BB axle Vs the Shimano's new "hollowtech" design.
|re: Tandem Crankset Question||Spoke Wrench|
Apr 20, 2001 5:43 PM
|I don't have any experience with TA cranks, so I don't have enough information to form an opinion, all I have is a fear.
Most tandems use a triple crankset. Setting up a triple using STI levers can sometimes be a little tricky. Add a long shift cable and it gets a little trickier. I want to have all the advantages I can muster. For me, that means Shimano's ramped and pinned chainrings because I've worked with them and I know how well they shift. For all I know, TA's may work great, but not very many people use them and can provide meaningful input. It looks to me like it's kind of an expensive experiment if you find out they don't work so well.
The hollowtech bottom brackets are a little lighter in weight, are supposed to be stiffer due to the larger diameter, and are supposed to transfer power better because they have more surface area. I assume all those things are true, but those aren't the kind of differences I can feel subjectively. I do know they are a lot easier to work with if you have to remove the cranks for any reason.
What kind of tandem are you getting? My wife and I are starting our 25th year of riding tandems together. Our current bike is a Santana Noventa.
Apr 20, 2001 8:54 PM
|Check out the Full Speed Ahead Carbon tandem cranks. 1290 grams, 32/44/55 chainrings.