I was reading up in the UCI regulations about cranksets, and they said something to the effect that a crankset needs to be either a 1, 2, or 3 piece system. Does anyone know what current cranksets are considered (two crankarms and a bottom bracket.) I’m asking this question to help generate ideas for a possible Senior Design Project. Thanks, any help would be greatly appreciated.
I don’t really know but thought I would reply because nobody else did.
I know how frustrating that can be.
This looks interesting and needs a BUMP…
Haha, yeah, I know- Thanks for responding. I guess it is not a question that is commonly asked, and one would take a pretty good knowledge of the technicalities of the rulebook to answer, but I will continue to bump it up every so often until maybe someone with such knowledge responds. Maybe UCI has a hotline or e-mail link or something. I’ll try that too. Thanks again.
I was reading up in the UCI regulations about cranksets, and they said something to the effect that a crankset needs to be either a 1, 2, or 3 piece system. Does anyone know what current cranksets are considered (two crankarms and a bottom bracket.) I’m asking this question to help generate ideas for a possible Senior Design Project. Thanks, any help would be greatly appreciated.
I would take that to mean 1 piece to be both cranks and the BB axle are one piece of metal (cheap bikes). 2 pieces would be the new 10 speed crank sets, and 3 piece is a single BB axle and two attached crank arms, what most of us have.
Dr. Day wins the UCI trivia question of the day. The real problem is what other kinds of cranks are there that don’t come in one, two, or three parts?. Another good one by the forward thinkers. I guess they are working around the spring loaded ones that store energy theory, although I have never seen one.
Email Gary Tingley, as the Rotor Cranks would seem to be slightly more complex than this, yet they ARE UCI legal. He could probably put you in touch with Pablo Carrasco, who invented Rotors and who also posts here occassionally (pcarrasco – not sure about spelling). I’m sure they could help you wrap your head around the rules…
Thanks Frank. OK, next question- Does anyone know if the governing body of triathon restricts the number of pieces of a crankset? Are RotorCranks illegal (I don’t know how many pieces that would be)? And come to think of it, how could you fit a one piece system to a bike? Thanks alot for the help. Apologies if the questioning is a little too much.
OK, thanks for the information Rappstar, I will do that.
Thanks Frank. OK, next question- Does anyone know if the governing body of triathon restricts the number of pieces of a crankset? Are RotorCranks illegal (I don’t know how many pieces that would be)? And come to think of it, how could you fit a one piece system to a bike? Thanks alot for the help. Apologies if the questioning is a little too much.
OK, thanks for the information Rappstar, I will do that.
Doubt if Triathlon restricts this particular aspect but I don’t know. However RC’s are legal, even in UCI. So, it is not the number of “pieces” but the configuration of the system.
Want to see how to fit a one piece system to a bike, examine your little kids bike or any bike next time you are in WalMart.
Thanks Frank. I’ll check out my Walmart Special Mongoose in my garage.
Cranksets on BMX, cruiser, and cheapo bikes that have a continuous piece of metal for the BB spindle and both crank arms are considered one piece.
The system most of us use with separate crank arms and a bottom bracket is considered a 3 price crank.
I suppose that the new crank designs from Shimano and FSA where the BB spindle is integrated into the right crank would be considered 2 piece cranks.
Yes, RotorCranks are legal, and have been used in the Vuelta Espana in 2003, and in Pro Tour races.
Gary