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Ikea bag £3

more like 2cm = +1 degree

67 out of 100. 50 are (will be in February) republicans.

okay then:
the only difference between 56 and 58 is 2cm more stack/headtube (and slightly more reach/front-center, about 5mm.)
So high or low headtube?

edit: standover for 56 is about 81cm

Which bike are you referring to?

...

(Deckas is a "hard no" from me)

Are they badly made?

There is 31mm width clearance (so officially 23mm + 4mm each side)
But with a derailer you can run slightly larger

okay, it is because cervelo p2c (and p3c) are cropping up for sale for cheapish prices (here in Denmark). I know they have been a possible bargain in uk/usa for a while.

Cervelo p2c as a singlespeed frame:
From looking at internet pictures it seem like the rear dropout is 27mm long which leaves 17mm of adjustment but if you want to run a 25mm tire you have already used 8-10mm to clear the seatstay.

So there is only 7mm of possible adjustment (so not a whole chain link: 12.7mm)

So how do people do it: use magic gearing only, run a 22mm tire?

att: @xavierdisley

check thread pitch as well, it can differ between models

another 20h front disc hub:
Gunsha

I dont know why I am arguing this, as I actually find mountain descents sitting on the toptube and stuff like that kind of cool :)

yes , but also forbidden! :)

Probably already illegal:

Bunch races (Road and Track)-
Article 1.3.008 of the UCI Regulations states: "The rider shall normally assume a sitting position on the bicycle. This position requires that the only points of support are the following: the feet on the pedals, the hands on the handlebars and the seat on the saddle."

Canyon aeroad 2021:

On Aeroad CF SLX and CFR models which feature full integration, this is a proprietary system that enables simple cockpit height and width adjustment. Stem length on each size is carefully selected using our extensive PPS data and, in our experience, is the correct length for most riders.

2019 cervelo s3 disc has something similar:

(inverted) quill stems are back!

powerway also has a 20h front disc hub (with pretty small flanges for straight pull spokes):
Powerway CX32

and novatec d041sb should be available in 20h (but needs to be converted)

powerway m81

Kinlin xr 31 !

or the new Kinlin rd-3ft

Kinlin XR26t

This seems to be the symmetrical disc version (but the listing includes a 20h version too which is unusual, so maybe ask the shop to confirm)
https://www.spacycles.co.uk/m20b0s116p3834/KINLIN-XR-26TS

Bitex makes some ->

-> Sturmey archer hbt30
there is both a 120mm and a 130mm version (longer axle and spacers )

but only fixed/freewheel, not fixed/fixed

kinlin xr 31 disc

you can buy the hunt 34 rim alone: https://eu.huntbikewheels.com/collections/rims/products/hunt-34-aero-wide-disc-rim

(but I dont think it is faster than the kinlin xr31 rim as the hunt testing was done with a 20 spoke front wheel.)

also the hunt 34 rim is not 34mm tall but 32,5mm so a bit of a misleading name...

a third candidate is the aforce al33 rim if you can find it.

It looks like it could end on +50000 (edit: not 100000)

No not at all. but it IS a major timesink :)

numbers (lots...)