Fixed Time Trial Bikes

Thanks Xavier I'll have a play with that. I'll have to change the post as that one is at max insertion before the profiled bit. (The post came with the frame)

My thinking was that I need to have my hips forward over the axle to get the power on, as I also find myself in this postion when I hunker down for a big effort on my road bike, though I guess I might be a bit high on that too, given your explanation.

Yeah, a cheapo one would do to experiment first before splurging on a posh aero one

a cheapo one would do to experiment first before splurging on a posh aero one

And then aerocoach to decide which one to use? IIRC, back in the olden days some people tested faster with a round post than the Giant aero one. Probably something to do with how the thighs interact with the post from an aerodynamic pov

I remember that, wasn't it Mike Burrows who said it? I wouldn't advise it TBH

wasn't it Mike Burrows who said it?

Probably

I wouldn't advise it TBH

Would be interesting to test, just to see if you could actually measure a difference

Looking at the price of USE Alien posts I am leaning towards "nah, can't make a lot of difference"

http://www.ebay.co.uk/itm/Profile-Design-Razor-Carbon-Road-Seat-Post-/291465733649

Thank you for that, i'll msg the seller for measurements.

Wing TTs I've watched on eBay have gone for around £30 - maybe worth saving a search to receive an email on the off chance that someone has the next size down for sale, or could post a wanted here.
Looks like you have a 350mm one atm (based on width of decal vs. width of post)
http://www.dolan-bikes.com/media/catalog/product/n/e/new_wing_tt_geometry_1_1_1_1_1_1_1.jpg

Ah nice one, I knew I'd seen a graphic like that somewhere, it eluded me this time. I might do as you suggest, I don't mind using a round post until something turns up.

What are my options if i'm looking for a 56t 1/8" 144bcd chainring? preferably a black one.

Geb?

Sonic only have 56t in silver, maybe one of the German shops have black.

56T Gebhardt in stock at http://www.bike24.com/p294935.html

TA Full Track is available in 56T but nobody seems to stock them bigger than 52

Just run a 12t? Or is it for posing? ;)

Just run a 12t?

He is running a 12T :-)

Id much rather run a bigger chainring and larger sprocket for smoothness, 13t's always seem to sound and feel horribly rough regardless of what chains i run!

Id much rather run a bigger chainring and larger sprocket for smoothness

Don't forget increased efficiency.

yep, that too, and posing. So I've got three legitimate reasons to use a serious looking chainring!

If you're going the Gebhardt route, you might as well go full nutcase and get a 60T, it's only another €5. That's likely to be close to the limit of chainstay clearance if you're using a conventional track chainline, so no room for a really serious looking chainring :-)

1 Attachment

^ I want that one.

^ I want that one.

At some point I'll get around to sending the CAD file to the machinist, I'm hoping I still want one when he gives me a price. It would be ~£140 in full carbon fibre from Fibrelyte. Projected weight as shown is 446g, down from 772g if it was solid aluminium, probably around 350g in solid 4mm carbon fibre.

Looking at the price of USE Alien posts I am leaning towards "nah, can't make a lot of difference"

Is this the right length for you?
http://www.timetriallingforum.co.uk/index.php?showtopic=106805&hl=

I have one of these
http://www.carboncycles.cc/?s=0&c=47&p=801&tb=002

£43 for a new 146g seatpost ain't bad.

Amazing, I just bought that seatpost from Facebook, Sarah is part of my cycling club and a regular customer for my coffee. I'm popping round to pick iy up tonight. Thanks for the heads-up all the same.