Cognitieve dissonantie ?
Dus Cyclofiets en tijdrijden is ok in wedstrijden. Let op de laatste regel !:
You see, XeNTiS mark1 is better than UCI allows ( nice )
zie bijgaand bericht m.b.t. UCI goedkeuring van de Xentis Mark 1 wielen.
Even voor de zekerheid nagevraagd bij Xentis zelf. ------------------------------
Mr. de X
nly for mass start races an UCI approval for "non standard wheels" is required, not at least for cycle cross. "Non standard wheels" show less than 16 spokes and/or a rim width of more than 35mm.
Wheels with less than 12 spokes (like mark1) will not reach UCI homologation for mass start races anyway, but they are allowed for time trails.
UCI-rules, Part 1, "General Regulations of Cycling as a Sport"
1.3.018 Wheels of the bicycle may vary in diameter between 70 cm maximum and 55 cm minimum, including
the tyre. For the cyclo-cross bicycle the width of the tyre shall not exceed 35 mm and it may not
incorporate any form of spike or stud.
For massed start competitions in the disciplines road and cyclo-cross, only wheel designs granted
prior approval by the UCI may be used. Wheels shall have at least 12 spokes; spokes can be round,
flattened or oval, as far as no dimension of their sections exceeds 10 mm. In order to be granted
approval wheels must have passed a rupture test as prescribed by the UCI in a laboratory approved
by the UCI. The test results must show that the rupture characteristics obtained are compatible with
those resulting from an impact sustained during normal use of the wheel. The following criteria must
be fulfilled:
n impact, no element of the wheel may become detached and be expelled outwards.
The rupture must not present any shattered or broken off elements, or any sharp or serrated
surfaces that could harm the user, other riders and/or third parties.
The rupture characteristics must not cause the hub to become separated from the rim in such a
way that the wheel becomes detached from the forks.
Without prejudice to the tests imposed by the laws, regulations or customs, standard (traditional)
wheels are exempted from the rupture test referred to above. A traditional wheel is deemed to be a
wheel with at least 16 metal spokes; the spokes may be round, flat or oval, provided that no
dimension of their cross sections exceeds 2.4 mm; the section of the rim must not exceed 2.5 cm
on each side.
Notwithstanding this article, the choice and use of wheels remains subject to articles 1.3.001 to
1.3.003.
(text modified on 1.01.02; 1.01.03; 1.09.03; 1.01.05).
XeNTiS mark1 passed the rupture test required, but the rule "at least 12 spokes" makes it unpossible to get UCI's commitment for mass start races.
You see, XeNTiS mark1 is better than UCI allows.
Gerald Possarnig
XeNTiS Composite GmbH.& Co.KG
Karlschacht 1, A-8589 Koeflach
T. +43 3144 70971-50
F. +43 3144 70971-10
M. +43 676 790 31 50
color=#0000ff
possarnig@xentis.net
www. color=#0000ff xentis.com
QUOTE] Origineel geplaatst door blehh op 14 April 2005
[P]kheb dit ook al eens bij de weenies gepost, this een test uit een duits triathlonmagazine ism SRM, ze hebben gemeten hoeveel watt je moet produceren om de fiets 2 min. op 45 km/u te houden..andddd here are the results :[/P][P]racebike normal 426W
racebike with timetrailsteerer 395W
timetrialbike 372W
TTbike with Aerohelm and Zipp 404 366W
TTbike with Aeroh. and disk rear 352W
TTbike with different wheels:
Lightweight 377W
Xentis Mark1 349W
X-Treme Windcheeter 370W
Trainingslaufrädern 387W
[/P][P]De xentis zijn duidelijk de meest aerodynamische wielen in deze test..groet, [/P]
[/QUOTE]