Well, look at this: In the wake of UCI starting to enforce the aspect ratio ruling, 3T has turned around relatively quickly to offer a new, UCI-legal TT bar. Welcome to the oh-so-affordable Mistral Pro: http://www.thenew3t.com/details.aspx?i=Aerobars&p=mistral&d=PRO
Well, look at this: In the wake of UCI starting to enforce the aspect ratio ruling, 3T has turned around relatively quickly to offer a new, UCI-legal TT bar. Welcome to the oh-so-affordable Mistral Pro: http://www.thenew3t.com/…;p=mistral&d=PRO
Based on the description on the website, I would assume that this has been in the works for a while (as a lower-cost version of the Brezza).
It is my understanding that the new rule interpretation includes seatposts and aerobars in the aspect ratio rules where before it didn’t and that some of the TT bikes out there have seatposts that violate the rule.
regardless, you triathletes better snatch up the 2008 vision tech bars that are on sale these days!
The Cervelo seat posts meet the 8x2.5 inch pass through rule which is 3.2:1 ratio and NOT the 3:1 aspect ratio that is now being interpreted to dictate seat post dimensions as well. P2C, P3C and P4 are all illegal in UCI events as of Jan 1 but they got a stay of execution at the ToC.
The interesting thing to me is how the UCI will interpret the rules with the seatmast bikes like the Plasma. Is the seatmast a seatpost or part of the frame? If its part of the frame it only has to pass 8x2.5, but if they classify it as a seatpost above the top tube its 3:1.
Thankfully I dont have to worry about UCI rules.
what a hassle for the bike component and frame companies to have to redo all this crap and the only people who really want the new bits are non paying customers who are pros =)
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Not only that, the regulation will likely apply to road bikes as well. My reading of 1.3.020 that states
“For road competitions other than time trials and for cyclo-cross competitions, the frame of the bicycle
shall be of a traditional pattern, i.e. built around a main triangle. The elements of the frame
shall be laid out such that the joining points shall follow the following pattern: the top tube (1) connects
the top of the head tube (2) to the top of the seat tube (4); the seat tube (from which the
seat post shall extend) shall connect to the bottom bracket shell; the down tube (3) shall connect
the bottom bracket shell to the bottom of the head tube. The rear triangles shall be formed by the
chain stays (6), the seat stays (5) and the seat tube (4) with the seat stays anchored to the seat
tube at points falling within the limits laid down for the slope of the top tube.”
The point at which the top tube crosses the seat tube is the extent of the definition of the seat tube. That is, anything over the top tube is seat post, not seat tube. That’s for road bikes but the rules for TT bikes say basically the same thing with regard to definition of “triangular frame.” I’m also interested in the sentence about “seat stays anchored to the seat
tube at points falling within the limits laid down for the slope of the top tube” meaning (to me, anyway), the seat stays have to line up to the top tube. That would make a number of bikes illegal. Giant Trinity, Felt DA, Ridley Dean, Look 496, Wilier Chrono to name a few. Basically most of the top TT bikes would be out.
So, how many of us Cervelo-riding triathletes care that our bikes are now non-UCI legal?
The Felt DA frame would be good based on the seatstay. If you visually extended the line of the stay, you will find it hits the toptube/seattube juncture. The rest of the material is “fill”.
Looking at the P4, this might be an issue.
Re seatpost vs frame, frame already has to be 3:1,
I am building a TT bike over the winter and am about to bite the bullet on this bar.
I WILL be riding a (only one) UCI TT event happening in my backyard (Gatineau, Qc, Canada) in summer 2010 (The race director is in my club) and plan on getting my ass handed to me.
Has anyone actually ridden this bar in a UCI TT?
If so, did the commissaires measure it?
Can anyone give some feedback (fit, adjust-ability, construction quality etc)