A Time Trialing Thread

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Plapp seems to have one of the best setups currently.

Very fast, well built frame without disc rotors, slowing it down
Fast bioracer skinsuit, probably custom. The best riders obviously have Vortec. Bigham claimed it as 14W faster than his previous skinsuit.
Good overshoes, probably wind tunnel proofed, Bioracer probably
Decent, generic, full forearm contact aerobar from Aerocoach. Could be faster potentially with Speedbar, but not by much
1x aero chainring (Pyramid?) with good chainline
Ceramic Speed OSPW to get 1W more
Waxed and powdered chain
View-speed skewers
Not sure about wheels and tires
Radio on his chest !!! Supposedly faster than on the back.

Wheels are Aerocoach Titan front and PCW rear disc.

Was that testing with a rider or the bikes in isolation? What yaw angles or averaged? Sorry for dumb questions…5w doesn’t sound a lot for bike that’s known to be fast at v low yaw angles vs one that’s marketed as faster through corners and up hills.

Recently I’ve been messing with some different fits and setups. I run a Aerocoach setup on my Trek and even with the lowest stem and riser, I still feel I could be lower in the front. Recently, Aerocoach advised they will be making a 22mm shorter stack adapter. Anyone think 22mm lower stack could be ideal for my setup?

image

:slight_smile:

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I dunno…you look pretty freaking low already. Just remember that lower does not automatically equate to faster / more aero.

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Your position looks crazy fast. You should definitely feel out if the lower front reduces your ability to produce power. It might be a zero sum or negative trade off.

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Yeah, I was gonna say this as well

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Absolutely… “low is slow, narrow is aero”, was what I was told when at the tunnel. What’s deceiving in the picture is I did that race with no padding in the arm cups to help get lower. It’s ok for 20ish mins, after that it hurts if the road is bumpy.

With the lower adapter, I could add the padding and still be a tad lower.

:slight_smile:

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Wow, that’s a pretty extreme measure.
What CdA did you test at?

Majoric-how do you see? I imagine your eyes are tired after what seems like an awfully odd angle to stare up the road. Don’t know how you do it.

If that’s the standard position I am amazed that’s not disqualified on safety grounds…

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Whilst you probably already know that only aero testing can answer your question, if you somehow feel you can produce good power with an even tighter hip angle, you should give Xav some more cash. No one else could possibly comment.

Good excuse to get a sweet pic of your setup posted :wink:

Some of the the very low numbers are at yaw, .18X - .19X seem to be consistent with no yaw.

Having decent numbers in the wind tunnel is nice but making them work in a non fixed environment is the challenge.

:slight_smile:

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Just sparking up some conversation in the Time Trial thread. Thankfully we have some pretty bright and experienced riders in the forum.

:slight_smile:

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Well, I agree with the latter sentence at least :wink:

I guess you posted this tongue-in-cheek! Anyways, in answer to your question, I think lower stack would not work. I think a rider in this position would be better raising their head so the back of the helmet (and the rider’s back) slope down at maybe 5-10 degrees. To make this work, you’d increase the stack and increase the arm angle to keep the gap between hands and head to a minimum.
As a fringe-benefit, the rider might be able to see up the road too :grin:

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Do you tape your Tempor? I know some tape over the back air vent to increase air directed to the sides…

I’ve one arriving on Thurs and am keen to experiment (using a local velodrome).

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No tape although I’ll be interested to hear your thoughts when you try it out.

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Will do!

Hoping to run some A:B tests with helmets - and then testing the taping method on the Tempor.

Apparently, it’s to do with channeling the air through the front vent to the sides more effectively. Am waiting on some more details, but will report back when I’ve had a go!

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Hello iam new to Time Trialing. Yesterday i got my new (second hand) bike

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