A Time Trialing Thread

Ah you mean on the brakelevers?

Yes, I’m still in doubt, do I also want recovery training at the TT.
Maybe i will change the 53 into 54 narrow wide and on the training wheel a 11-28.

So if you mean on the brakelevers i think: left front up and down and right after up and down?

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Yup, that is how you would configure it.

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TT season to kick off in 3 weeks, and I finally got the TT bike off the turbo.
Really cool to finally be riding this beauty again.


I currently have the GP5000TT 25c mounted to rear, that comes out to 25.8mm on the Roval. You recon a 28c would be a penalty at all? Definitely should just fit in there. Probably rolling a little faster.
Front wheel I currently got two options: Roval Rapide CLX with Turbo Cotton and Latex inner for windy days (this combo tested 2.8 Watts slower than the AEOX TITAN for me at 45kph). Option two is SwissSide Hadron 2 Ultimate 80mm, with a 25c GP5000TT.

I guess not much potential on the bike. Now it’s about gaining more confidence to drop the head deeper and corner faster.

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Im using the original Hadron 625 (clincher and aluminium breaking track) and swap it on extreme windy days for a Hunt Aero Wide (I think 35mm) but a lot of times Ive used the Hadron in the wind its actually a lot better than my psyche dictates. If I remember right the kickstarter blurb said something about the shape of the rim :joy:

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I’ll definitely try to use the Hadron whenever sensible. It’s pretty stable.
However, I am really happy to have done the testing on the front wheels, as it shows the effect is much less, than it looks (the 51mm looks too shallow in my eye, while a 100mm looks awesome!).

Sitting up once, or raising my head for 30 more seconds than with the shallower wheel, offsets all the advantage of even a 100mm. Good news!

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What do you think of tubeless on the time trial bike (front wheel)? I now drive GP5000s TR and am sometimes afraid that if the tire gets a puncture and is sealed by sealant. That I can fly out of the corner because of a soft front tire. I am now thinking about cycling with latex inner tubes instead of tubeless

Why would a TL tire be riskier than a leaky tubed clincher losing air? At least it seals at all…

Because with an inner tube you immediately notice that you have a flat tire and then no longer fly full into a bend. With tubeless you can go from 6 bar to 3 bar, without noticing it, until you go crooked into the corner.

Yeah, Idk about that. You might as well “notice” your clincher loses are when in a corner.
On a clincher you notice it because it goes so low, when it becomes really dangerous…

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I’m using the gp 5000 TT set up tubeless this year, no issues so far and in the real world doesn’t seem any slower than the corsa speeds with latex tubes I was using last year.

If you’re concerned about safety you can install with the liners for some protection, you’re giving up a few watts for peace of mind.

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Assuming that you mean the vittoria inserts? My understanding it that you dont actually loose any watts due to rolling risistance because they compress away from the tyre when inflatted to road pressures? They will add weight though obviously.

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If your front tire goes from 6 bar to 3 bar, you are almost certainly gonna notice it, IMO…

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I use a Tubeless rim for training and sometimes use the same wheel for really windy races. Its much safer than latex less likely to p’ture, blow or pinch. If my deep section was tubeless compatible tubeless would be my choice.

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I read something from one of the sky riders that there was a small penalty, but BRR report no penalty :thinking:

Now wondering if I should get some set up in my race wheels. Have the training wheels set up with the liners, on the basis I will get recovered if needed in a race, but that my wife won’t come get me on a training ride!



GP5000TT TR in 28c. Really light at 228g. Just some 1.5mm wider than the 25c. Seems to fit perfectly into the frame, and is still shielded by the seat tube.

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Yes I understand the Roval shallow front tests really well compared to a deeper alternative.

The difference is really only that marginal at 45km/h :open_mouth:. I am having my first TT of the season this Saturday (Neusiedlersee Gran Fondo TT) and it currently is said to be quite windy, so I will probably prefer my Enve 5.6 instead of the Revolver Troika TMD.

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I had the opportunity once again to do some velodrome testing with gear I just recently got and, as I was done after just a few runs (TT5 is as fast as it looks silly), a local clothing manufacturer asked me if I could do runs for them.


They had one suite prepared to show the airflow which they let me use😲. Not too sure what to do with the information yet (for me), but it is quite interesting and they shared the pictures online.

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That suit - are there little feathery ribbons on it, that move with the airflow, and show the direction of the airflow? Looks very cool. I think aerodynamically the more interesting info is the speed of the air and the pressure differences, but this is neat too.

I wonder if the assymetry we can see has to do with pedalling action, or with the angle you’re at in the velodrome?

Yes, little threads / strings were attached to it to show the airflow.
The asymmetry appears to be in where the low pressure zone behind me is about to start?

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