20 meter on the 100 thread lol
and it has been a wile i was on race ranger site but i am 99.9 percent sure
both the flash light and the time in drafting zone are activated at the same time
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I don’t have access to the RR code, but it’s hard to believe that the distance measurement isn’t a single parameter that is accessed both for the logging and for the light color determination. The only issue I could see would be how frequently the system that controls the light color accesses the distance parameter. There might me some delay or time averaging to get noise out of the system and adjust for fluctuations. For example, if the riders are going around a curve, it might measure the chord distance between them and show a reading that is shorter.
Since the benefit of drafting is exponentially greater the closer you are, it would be nice to see how much time rides spent at each distance in the draft zone. A minute at 19m is a lot different in both benefit and intent than a minute at 5m.
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How could it not do this? It would be a hell of a program that could see turning radius and account for the shortened distance
It would actually be an interesting assignment for the athletes to mark out 20m on the ground, and then put a chalk mark on the ground where their lights go off and compare them. Shouldn’t take more than a couple minutes.
Just as with the treadmills in e-triathlon events, there is undoubtedly some variation in the RRs that allows some to ride at 19.5m while others are riding at 20.5m. The idea of these things being consistently accurate from unit to unit at 1-2 inches seems unlikely to me.
That’s kind of what I was getting at, and if so, could explain some folks higher in the zone #’s. To really sort this out you would need time stamped cameras on the bikes, linked to the time stamps of the RR reports going into home base. They you could actually look at some stat of so and so in the zone, pull up their camera view, and actually see if the red light is flashing or not. I mean the hard part is done now, RR is the greatest thing to hit triathlon officiating since the dismount line..Cameras are cheap and easy, just about every car has one on their dashboard now, so just link them up and no more guessing..
I can think of several possible solutions, but seriously doubt that RR operates at this level of complexity, so I’d wager that RR operates just like you mentioned:
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GPS mapping against embedded maps. Garmin does this, track mode being a good example.
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Accelerometer measurements in the units. When going around a bend there will be acceleration perpendicular to the direction of travel. Knowing the velocity of the bike, the system could then calculate an approximate radius.
Beaugrand is on the Noosa start list.
Yep, just came in to post this.
8,500 competitors…Ironman 'aint doing so bad
Currently it doesnt matter if their data is 1-2 inches off. The data provided is directional and the same will be true with the app once it’s deployed. It will be used by the refs to guide their visual inspection of how athletes are competing and abiding by the drafting rules. the 1-2 inches that you are questioning only becomes an issue if they begin to apply strict electronic applied penalties (Highly doubt that in on the near to intermediate horizon at any level). The only potential current implication is to the drafting=cheating zealots who will look at 1 min of yo-yoing and attempt to label an athlete as a cheater.
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I’m not sure what you’re getting at here and I think you might be overcomplicating it.
I assume that the light goes on at the same time that the system logs that the athlete is in the draft zone.
So regardless of how accurate the units are, the important part to me is the light going on as that’s what the athlete sees. And again I assume the times reported align with the light behavior. If someone was seeing the light at 19m or 21m all day, so what? That’s accurate enough.
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My point is what if the light doesnt go on but the athlete is being recorded as in the zone? At this time there is only a shame penalty for that, and as you can see those folks names are already being thrown around as less than honest..And a lot of people are now calling for after the fact penalties based on those recordings. So I guess what I’m saying is that they better make sure that all lines up first, should have done that before attaching names to their stats too..
I’m not interested in the when the light goes on discussion. But if I was an athlete I’d want to know if my unit makes me draft legal at 22m while someone else is draft legal at 19m. It’s easy enough for them all to check.
For what it’s worth, they claim accuracy within 10cm (4”) in the 0 to 30 meter distance and ~ 10 updates per second. If that’s the actual case, it seems more than fit for the task to me.
Key Aspects of Accuracy:
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Precision: The core technology uses UWB for ultra-precision within 30 meters, providing accuracy within 10cm.
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Update Frequency: Measurements are taken and displayed up to 8-10 times per second, ensuring up-to-date information for riders.
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Technology Integration: The system transitions from GPS for initial athlete detection to UWB for the critical, high-precision distance measurement when athletes are close.
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Latency: Years of research have focused on minimizing the delay (latency) between a rider crossing a threshold and the light signal changing, making it imperceptible.
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good man ! thanks
Renouf interview covering the T100 set up for 2026.
See T100 World Tour 2026 - #57 by Ajax_Bay
Simmonds not on the start list for T100 Dubai but is for Phuket, as a ‘warmer into the butts’ - edit: I note she won there in 2019 after her #3 in nice ans #12 in Kona. Maybe take the ‘Road to Qatar’ from there. As a contracted athlete she has an automatic spot on the start line.
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Are you sure they didn’t do it before and are you sure it’s not matching up? You are asking valid questions and I want to give you the benefit of the doubt, your not accusing them of not doing their homework are you (this statement I pulled gets close to suggesting they didn’t)?
I would assume the “error” within technology will always be there, but at the same time, that error is probaly smaller than imo human error. We literally had 40 years of our sport where we basically “guessed” what the legal draft zone is in a moving dynamic race after race and we never blinked at their error margin.
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Is my math counting 17 starters for the men?
No Fred Funk? Thought he wanted to do Dubai easy to fulfill his contract?