Help winning the national TT title

Discuss light weight issues concerning road bikes & parts.
hna
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by hna

AGW wrote:^ I don't think it's an aero gain based on the cranks themselves, but more to do with more open hip angle it affords some riders at the top of the pedal stroke. I don't know whether the benefit of this might be cancelled out by having to raise the bars concomitant with the seatpost, though.


You will have to raise the seat, but opening the hip angle allows you to go lower (back to the same angle with longer cranks), and possibly keep the same handlebar height.

You might increase cda by having your ass higher though. But it's worth playing around with crank sizes. And I would definitely not go longer than what you have on the road bike.

by Weenie


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WMW
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by WMW

hna wrote:You might increase cda by having your ass higher though.


No... your ass will not be higher than your back. And note that your saddle is only higher because your feet are higher. There is no increase in frontal area from this.
formerly rruff...

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Tinea Pedis
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by Tinea Pedis

Ta williamsf1.

And I'd take 5 free watts, no matter what my power out put.

weeracerweenie
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by weeracerweenie

Exactly. Even of we only make 20 watts if difference that closes the gap significantly. Lots of small gains is what we are after. Full spec list coming soon. Sorry for the delay guys
I guess there's worse hobbies than making a bike light? Right?

dereksmalls
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Location: New Zealand

by dereksmalls

Hey T, how's things? Is that Dan Waluszewski's bike? And are you comparing it to Joe Coopers? If so, they were both built up by Capital Cycles, who build my bikes btw

weeracerweenie
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by weeracerweenie

Hey Stu, sure is Dans bike. Capital has a good rep in old Welly. Build list coming tomorrow. Prepare your keyboards guys.

Myself and theremery have devised a plan to heat shrink the bottom of the pedals to gain some watts. Kind of like the look keo blades that have the carbon base.
I guess there's worse hobbies than making a bike light? Right?

dereksmalls
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Location: New Zealand

by dereksmalls

Here's a pic of Dan setting a new course record in a local race around here on the bike in question about a week or so ago Image

wasfast
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by wasfast

He may consider rotating the helmet further back on his head. It looks rather silly standing around at the start but helps keep the tail down against you back. As shown, if he looks down, instant sail. I prefer feeling the tip of the helmet touchcing my back as a guide.

Great project, hoping your man wins it!

nathanong87
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by nathanong87

sponsored by subway. wicked

jimboweenie
Posts: 9
Joined: Sat Dec 03, 2011 1:24 pm
Location: North London

by jimboweenie

In the original pic the bar-end shifter is turned down into the wind. Could you replace it with Campag-style shifters that stay in the same place as you shift?

odin99
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by odin99

play around with the praymantis/Floyd Landis position. works for some (although not all)

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WMW
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by WMW

From that photo he appears to have a lot of room for getting lower in the front, and working on the shrug and turtle. I'd guess his CdA is pretty high and he makes up for it with power.

And I'll 2nd that the helmet should be rotated back. Holding a position where the top of the helmet and the top of the back are at the same level is usually best.

Also, narrow elbows spacing is usually best, and if that doesn't work for him, mounting a bottle between the arms was found to usually be faster than no bottle by Cervelo.
formerly rruff...

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rjk8
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by rjk8

Friction Facts for lubes and chains. www.friction-facts.com
R.J.
Some people tune their car, I prefer to tune my bike.
http://ilcappellino.blogspot.com/

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rjk8
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by rjk8

WMW wrote:From that photo he appears to have a lot of room for getting lower in the front, and working on the shrug and turtle. I'd guess his CdA is pretty high and he makes up for it with power.

And I'll 2nd that the helmet should be rotated back. Holding a position where the top of the helmet and the top of the back are at the same level is usually best.

Also, narrow elbows spacing is usually best, and if that doesn't work for him, mounting a bottle between the arms was found to usually be faster than no bottle by Cervelo.


+1
R.J.
Some people tune their car, I prefer to tune my bike.
http://ilcappellino.blogspot.com/

by Weenie


weeracerweenie
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by weeracerweenie

The rider is pretty aiming his position is good. But may be limited to going lower by the bike. Ill suggest a fitment by another fitter, see what he says.
I guess there's worse hobbies than making a bike light? Right?

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