Rule details of mass-start legal bicycles
joraff
deferred to what UCI has set forth in regards to road bike
configurations), and here's what I've come up with in layman's terms:
1.) Wheels can have aero spokes as long as each blade is not wider
than 1cm. I did not see any restriction on rim, but a 3:1 ratio
(stated elsewhere in regards to fairings and tube shape) may apply
here.
2.) The front triangle tubes may be any shape (teardrop shape is
legal) as long as they conform to a straight line and are not a.)
larger than 8 cm or b.) smaller than 2.5 cm at any point.
3.) Rear triangle (excluding seat tube) may be 8 cm max but 1 cm
min.
4.) A credit card must be able to be passed between any moving and
rigid part without bending or being obstructed. Most applicable is the
gap between the rear wheel and seat tube.
5.) Where the seat stays meet the seat tube must be within 16cm of
the top of the top tube (probably nearest the headtube). Most TT bikes
have seat stays join the seat tube lower than where the top tube does,
and according to the rules this is OK (as long as its within 16cm, of
course).
6.) The bike must not have any part designed to reduce air drag that
exceeds a width to length ratio of 3:1. This might apply to some
teardrop, oval, etc. shaped tubing, but most that I have seen don't
appear to be beyond this ratio. YMMV, so measure it yourself. Look out
for extensions behind the head tube and seat tube designed to reduce
eddies.
Didn't see much else that was likely to apply. Coaches, directors,
rides - please correct me if I've misread anything.
Hansen, Jeffrey
If html works with the list-serv, you can check this story out from the December newsletter, below, that should answer most questions (and redundantly restate what you just pointed out, as far as I can tell… thanks for all that research!). If not, try this: https://www.usacycling.org/forms/Areo_Equipment_Regulations.pdf
So What Is Mass-Start Legal and What Isn't?
Ever tried to read the UCI rulebook cover to cover? USAC Technical Director Shawn Farrell could recite it to you from memory, but that might take a while. So how does one figure out exactly what the new collegiate aero rule means for his or her equipment? Even the UCI "Practical Guide to Implementation" is a bit dense.
Fortunately for us, collegiate cyclist and official Raymond Junkins has compiled a handy guide to what's legal and what's not. Find it here. Thanks Ray!
For the most up-to-date list of non-standard wheels that are approved for mass-start use, check here.
-Jeffrey
Jeffrey Hansen
High School & Collegiate Cycling Program Manager
USA Cycling
210 USA Cycling Pt.
Colorado Springs, CO 80919
(p) 719 434 4215
(c) 719 229 9780
(f) 719 434 4315
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Carter, Julie
This would need to go over with the Chief Ref ... is that Jacque or Matt by any chance this time around?
Let me know - thanks!
Julie
________________________________
Alan Moore
I've done two 20K TT's in the same event before (Cat. 4 and Masters), just had to make sure there was enough time between the finish of my last ride and the start of the next one so I could change numbers (and replace a wheel I blew out with 1K to go in the first run). I don't see any reason why that couldn't be done, but remember that those riders would probably have to bring two bikes or clip-on aerobars unless they plan to ride a standard road bike both times.
The good thing about this TT is that this is a loop course and you come back directly to the pecan station from where you started, so a transition can be pretty quick. All you need is about 30 or 35 riders between your two runs. I hope we have that many for that luxury so check with us as registration goes on. Racers go off in order of registration so the example I would give is for a Cat. A racer to be among the first to sign up in the A's and then be among the last to sign in for the Cat. 1/2's.
Haven't finalized the officials yet. Jacque will not be able to make it.
Alan
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Carter, Julie
I just wanted to check before I mentioned anything to our riders.