Any question answered...

Could one machine a thingy that presses into a normal 1 1/8" headtube (34mm) which widens to 44mm for a 1 1/2" adapter headset thing at the bottom? Would it adversely affect the lifetime or operation of the headset somehow?

How long would it have to be? There doesn't seem to be a standard taper. There are some forks like this that it seems you could probably bodge in:

And others like this that would be difficult:

Probably one for @mdcc_tester

Edit: 30s diagram attached

Edit: obviously you've effectively increased the axle-to-crown a little bit. Not overly concerning to me personally.

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Cheers, I've worked it out with Notepad++

were there 2 versions of 6603 cranks made? 110 and 130? or just one? if so what BCD is it?

Answered my own question

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What tape colour would help me sell this bike quicker?

I have black, blue, yellow, vintage marble blue yellow black

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What tape colour would help me sell this bike quicker?

I have black

You've answered your own question there. Anything is has the potential to put somebody off.

Mind you, those bars will put any sensible person off, so tape is hardly the issue :)

If I understand your question correctly Cane Creek already makes what you're looking for:

http://www.jensonusa.com/Cane-Creek-40-Series-EC4440-Bottom-Cup-Black-15-Crown-Race-EC44-Lower-Tube

CRC also stocks it, but I link to jenson because they have a better description.

http://www.chainreactioncycles.com/nl/en/cane-creek-40-series-ec44-40-bottom-assembly/rp-prod115641

30s diagram attached

1870s load analysis says that the further the bearing is extended out of the press fit in the head tube, the more the radial load on it will tend to tip the cup out of the head tube.

If I understand your question correctly

You don't. He's trying to get a 40mm ID bearing fitted to a 34mm ID head tube, not the 44mm tube used by the product you linked to

How big a problem is that likely to be considering you've got the stem and gubbins loading everything? Couldn't one counteract the problem by having a longer press-fit 34mm section?

When you've (properly) fitted everything the top cap is unnecessary - the stem is keeping everything in place.

Accuracitified, thanks

How big a problem is that likely to be

Depends on the magnitude of the load and the length of the lever

the stem is keeping everything in place.

Until your frankencup tries to lever itself out of the head tube and pulls the steerer through the stem. In practice, all AHead stems try to walk up the steerer on load reversal, and leaving the top cap in place seems to help to prevent this, so your headset preload doesn't go out of adjustment as quickly. I add more bolt tension to the preload adjuster after clamping the stem to the steerer, to make things even more secure.

Black.

Tyres.

To attack it from a different angle, I've never heard of an external headset popping out under load, so they must be well within tolerance normally. Say the external part of my frankencup* is the same height as a normal external cup headset - it's got two press fit interfaces and twice the vertical distance from the headtube to the crown... the lower stack height is going to be what, <30mm? There must have been some really chunky headsets in the past that were nearly that long, no?

* good name, thanks. I grant you a 0.5% share of any future profits derived from this venture.

Edit: If you make the 34mm press-fit bit longer and longer at some point this thing would be so sturdy that it's practically equivalent to a normal 44mm headtube, no?

We've been through this. All of it.

Also posted this in the Rapha thread, but thought I could post here as it’s retail/math question..

I want to order a pair of Medium and Large bib shorts (£95 each before discounts), then return the size that doesn't fit.

If I use the 25% discount code and a £25 gift voucher the order total is £117.50 + free shipping for two pairs of shorts.

How much will I be refunded for the one pair I return? Half of £117.50 (£58.75)?

If I order just one pair the total is £51.25 (£46.25+£5shipping).

Doesn’t the voucher count as cash? So you would be refunded the discounted cost of one pair (71.25), making your remaining pair cost 46.25 cash + 25 voucher.

Ah yes, that makes sense. Thank you!

https://www.everbuild.co.uk/product/sika-mould-buster/

A pump up garden sprayer of a suitable size for your path and spray on 2 to 3 times a year.

There is no need to order 2 pairs. Size advice will not be hard to obtain and there will be little risk to get it wrong.

They have free postage and returns so I prefer to order a medium and large. As much as I trust advice on here I’d rather just try both sizes.

^ This. I almost always have to do this when trying new brands or sources.

F*ckF*ckF*ckF*ckF*ck-------- off to the alps for two weeks tonight, just thew my back out putting the suitcase in the boot----best remedy? shit loads of ibuprofen????