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show-off taping: white black yellow

probably too much of a muchness

probably loads of mm higher :)
-> http://www.rre.co.uk/CupWasherM6Black.html

brake or gear part?

I have no idea of prices (STI, gears...) but someone said these SRAm were cheap. Maybe something?

Sram Rival22 275 euros
Sram Rival1 319 euros

• single right 10 speed Sram S-700
  

Ideas :)

I found a shop with DT swiss new aero spokes!

Black (or white or silver):
http://ebike.hu/termekek/kerek/kullo/109324_dt-new-aero-fekete-kullo/
about 1.5 euros each + 6.5 euros for shipping, you order and then they get them from dt swiss, took a week for me.

or cheaper silver from Poland:
http://bikepark.com.pl/sklep/szprychy-i-nyple/dt-new-aero
0.93 euros + 4 euro shipping

there are some here:
Tom Anhalt's tyre rr list

3d (sphere, cube...) vs 2d shapes (cylinder, square rod...)

There are these (not aliexpress so a step up in price, but I think there is a warranty!)
http://www.bdopcycling.com/DTO-40%20DISC-SPECIFIC%20CARBON%20RIMS.asp

yes there is also something about it that looks wrong :), but he asked for a practical build.

there is also these:

http://www.bikerumor.com/2015/09/02/eb15-birzman-guards-against-spray-with-worlds-most-aero-fender/

Use a offset rim for the front wheel as well (front disc hubs are offset)

very rough estimate:

ignoring interference and shielding (from the tyre):
Front fender drag coefficient : 2.3
(shape 20)

area: 0,045m x 0,4m = 0,018m2
cda of front fender= 2.3 x 0,018 = 0,0414
which is (via drag to watts calculator at the bottom of the page)

= about 14 watts at 30km/h so less than that :) (because it is behind the tyre)

if only considering the 2 cm it sticks out wider than the tire: about 6 watts at 30km/h for the front fender

edit:
or apparently buy Bicycle Quarterly Vol. 6, No. 1 and Vol. 6, No. 3. and find out ->
https://janheine.wordpress.com/2012/05/02/aerodynamics-of-real-world-bicycles/

http://djconnel.blogspot.dk/2011/04/aero-road-frame-versus-front-fender.html

...

Thanks, sounds promising

my arse cant tell the difference between this and composit.

with or without cycling shorts?

Would it help if the spacer was thinner than 1mm?

https://www.bike24.com/p226069.html

Probably a question for @mdcc_tester :)

If I (for reasons...) wanted to drill new spoke holes in a aluminium rim, what would have the strongest connection: holes for internal nipples ~2.5mm or normal holes 4.5 mm.

i guess the smaller hole would be stronger but wouldn't a normal hole + nipple spread out the pressure from the spoke over a larger area?

when in doubt use DT Swiss Competition...
https://www.rosebikes.co.uk/article/dt-swiss-competition-spoke/aid:807361

https://www.rosebikes.co.uk/article/dt-swiss-competition---the-classical-spoke/aid:48044

truvativ make some:

http://www.amazon.co.uk/Truvativ-Chainring-Single-Steel-Spacer/dp/B001GSQO3W

better link:
https://www.bike-components.de/en/Truvativ/Kettenblattschrauben-fuer-1-fach-Kurbel-p33907/

I actually think shimano will have a post mount caliper option for the groupset as well .

wrong way :)

Thats for: flat mount (bike) > post mount (caliper)

not for: post mount (bike) > flat mount (caliper)

yes xtr is only worth it second hand / old models

Any idea how tough the ti freehub is?

No :)
Seems to be 330g vs 270g for whole hub