Help winning the national TT title

Discuss light weight issues concerning road bikes & parts.
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Tinea Pedis
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by Tinea Pedis

Grill, what helmet is that?

Dat position!

Image

by Weenie


Grill
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by Grill

Bell Javelin. Keep in mind being a Drag2Zero rider he has full access to a tunnel and Simon Smart so they would have chosen that helmet for Botty after testing pretty much everything on the market.

He's still the fastest postman I know of!

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Tinea Pedis
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by Tinea Pedis

Aware of that. Just interested in the helmet model.

Ta.

weeracerweenie
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by weeracerweenie

Wow thank you all for the amazing replies! Im in the process of getting all the rider and bike info off him, i can confirm the lightweights are just the wheels on it for the photo. He has a Firecrest 808 and 2014 sub 9 disc for race day so that solves that! Ill update when i have the build list for everyone!

Thank you so much!
I guess there's worse hobbies than making a bike light? Right?

weeracerweenie
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by weeracerweenie

Tinea Pedis wrote:Grill, what helmet is that?

Dat position!

Image


Ps this is brilliant :thumbup:
I guess there's worse hobbies than making a bike light? Right?

williamsf1
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by williamsf1

while we are on TT everything....

best wind tunnel in Australia for TT work - keeping in mind that they need to be experienced in TT setup as well as Aero.

I have some of simon smarts booties coming - might have to do some testing with the castelli and a smart suit too!

165mm cranks and a higher seat are the next aero thing too :D

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WMW
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by WMW

I've been running 150mm cranks this year and increased drop 2cm. Definitely no power loss, but I was hoping for a noticeable gain. Feels way better though.
formerly rruff...

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WMW
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by WMW

weeracerweenie wrote:Wow thank you all for the amazing replies! Im in the process of getting all the rider and bike info off him, i can confirm the lightweights are just the wheels on it for the photo. He has a Firecrest 808 and 2014 sub 9 disc for race day so that solves that! Ill update when i have the build list for everyone!


That makes it tougher...
formerly rruff...

shimmeD
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by shimmeD

WMW, I'm interested to know what cranks you're using, in fact anything shorter than 165mm. Many thanks.
Less is more.

Phill P
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by Phill P

For race day remove all the bearing seals but the outer most ones on each hub and the BB, clean out the grease, and run sowing machine oil. This will give a huge improvement regardless if you are running steel bearings or ceramics. Ceramics will just survive that sort of abuse longer (because the balls won't corrode) and give a hint more speed. If you leave the bearings that way you might want to put a little oil back into each bearing each time you ride them but make sure to wipe away the excess with a lint free cloth to stop debris/dust/dirt from getting collected.

(BMB have EZO and HSC bearings for zipp wheels.....)

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Tinea Pedis
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by Tinea Pedis

williamsf1 wrote:165mm cranks and a higher seat are the next aero thing too :D

Links for this?

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AGW
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by AGW

^ 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.

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de zwarten
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by de zwarten

Some things not mentioned yet:
Helmet with visor vs. helmet with glasses;
put tape on the valve hole (obvious);
think about rain/wind when choosing wheels and especially brake pads + rim material (depending on course) (still the most valid reason some riders opt for clinchers, namely the alu braking surface);

williamsf1
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by williamsf1

Nick

http://www.cervelo.com/en/engineering/a ... ength.html

so far we have gone 172.5 to 170 - this is all with the front end slammed as far as you can go (knuckles nearly on the top of the front tyre) as we are talking a 48cm frame and someone who is crazy flexible.... (forearms on the ground kinda thing! from standing up straight...)

using dartfish software I have been working on how we can reduce Cd - as increasing power is very hard, but a few watts saved via drag add up when you are only talking 5w out of 240w unlike big bruiser TT boys when 5w out of 450w....

so yeah 165mm will raise the seat and keep the same hip angle with a flatter back and smaller frontal area.

I'm keen to try both cranks in the wind tunnel soon, also :D

by Weenie


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WMW
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by WMW

shimmeD wrote:WMW, I'm interested to know what cranks you're using, in fact anything shorter than 165mm. Many thanks.


There is a guy in the US who will shorten certain cranksets for ~$70. On Octalinks (which is what I was running anyway) it's 22mm, so he can leave enough around the pedal hole, and still avoid getting into the hollow channel.

http://bikesmithdesign.com/Short_Cranks/shorten.html

The other alternative is to use BMX cranks which come in short lengths.
formerly rruff...

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