Aloha not UCI-legal in sizes 56cm? why?

[Mandrew]

SIZES: 49cm, 52cm, 54cm, 56cm, 58cm, 61cm

 

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COLOR: Black/Red

 

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WEIGHT: 20.10 lbs / 9.13 kg

 

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MSRP: $1300

 

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NOTE: The ?08 Aloha is designed primarily for triathlons. It is not UCI-legal in sizes 56cm and above.

 

http://fujibikes.com/2008/bikes.asp?id=416

 

What's up with that :?: ?

 

[gummibear]

The seat must be to far forward on those sizes.I think that is for road racing but not to sure.  

[Christie]

Hmm, the saddle position looks OK. Has to be at least 50 mm behind the BB, bigger size should make this easier.

I would guess that the aerobars on the large frames is too far foreward. The tip of the bars may not be more than 75cm ahead of the bb. On large frames this limits the length of the bar extensions significantly. (Can go to 80mm if the race comm allows it dur to anatomical considerations)

[buckstopper]

The 50mm law is referred to under the road bike section of UCI regs. I could not find it expressly stated in the TT section. They enforced it at SA's last year (although I suspect not entirely thoroughly). With the angles of TT bikes being what they are, for anybody under a large size, the 50mm law is going to become an issue. What it means is that a shorter rider becomes geometry compromised when compared with the taller rider - as the saddle goes higher it moves further bac, giving the taller rider this unfair angle advantage.

 

I'm setting up a small Giant TCR for my daughter at 73cm seat height, with a neutral (no setback) Thomson seatpost I have to set the seat (a short seat at that) behind the centre marking on the seat rail to conform. This on a road bike. How does anybody with an inseam of less than about 80cm enter the TT, riding a TT bike with a Fizik saddle,say, conform?

 

A well known cyclist and TT boff I spoke to says (perhaps being a bit vague) that so long as the nose did not protrude past the bb that it should be ok.

 

Last year at SA's we were compromised by this law and had to move the seat back 40mm on the start line! There were no rules published prior to the event. The question is well the enforce what is really not a fair law, that would give a Cashandra Slingerland an advantage over an Anriette Schoeman, for example.

[Christie]

Hi buckstopper,

Taylorchic said the 50mm saddle rule was a hassle for ladies at the junior worlds TT last year. The officials were very strict, and saddles had to be moved back before they were allowed to start the TT.

The saddle on my TT bike is currently not 50mm behind, would be nice to get some clarity on this. 

[buckstopper]

Exactly the reason for my post. I am wrestling with this issue right now. I wonder if it has something to do with taller riders doing better at TT. I believe the purpose of the law originally was to avoid riders adopting the Obree almost prone position, an ill-considered knee-jerk reaction type law, perhaps. I am surprised so few people supposedly in the know, either don't know, are deliberately quiet, or haven't raised the issue.

[Barend de Arend]

I really recommend reading the following URL.  It tells you common reasons small frames are illegal, large frames are illegal, how to appeal the rules.

 

http://www.slowtwitch.com/mainheadings/techctr/tt_fit.html

 

 

[Christie]

Thanks BdA, nice link