Any question answered...

Are Campag mech's not like Shimano where a the mechs are all the same you just need a band if there isn't a mounting attached

Cheer up mdcc

Why has one nut on my rear skewer not got a serated edge in the inside? It slips in the dropout everytime I brake causing the wheel to grip the chainstay. Wierd thing is, the chainstay was worn on the frame when I got it, so it's happened with other wheels on this frame too.

It's campag, it's not worn off it's just flat. WTF? I might just swap the nut with my front one.

If swapping doesn't work (I don't think it will) a tug nut will fix it.

Some set-ups just seem to need them.

Tracknut or QR? I have a a pair of perfectly good QR skewers around here cluttering up the place.

QR on campag dropouts so don't think I can fit a tug nut, only adjuster screws, which are pointless. Thanks Aroogah, but I swapped them and it seems fine.

Makes you realise how important that bit of serration is.

I'd go for one of these:

This image found here: http://www.jensonusa.com/store/product/CA307Z01-Wheels+Mfg+Step-Down+Ferrules.aspx?sc=FRGLUK&cc=GBP

The adjsuter barrel on the mech should be fine

These seem to be too tricky for the bike shop.

In any case what I really need is the correct Derailleur Cable Housing, like this:

another long winded search ensues

Sounds about right. Maybe 6mm. Hang on…

(1 tooth = 1/2")

53t circumference = 12.7mm x 53 = 673.1mm; diameter = C/pi = 214.25mm; radius = 107.13mm

50t circumference = 12.7mm x 50 = 635mm; diameter = C/pi = 202.13mm; radius = 101.07mm

Front mech moves down 107.13mm - 101.07mm = 6.06mm

Yeah, so my from memory "about 5mm" wasn't too shabby, maths nerd. Hang on, I thought this shit was Object's job and you were the word nerd. What gives?

maths nerd.

He's clearly not a maths nerd, because he approximated the answer by assuming that the chainring circumference is (number of teeth) x (chain pitch). His answer for the *difference *is correct to the stated accuracy of ±0.01mm, but only because the difference between the two rings is small and the number of teeth relatively large. The correct calculation would be the chain roller pitch circle diameter, which is always larger than the number he calculated, except for a ring with ∞ teeth when the numbers are equal. The simplest one to calculate is a 6 tooth sprocket, which has a PCD of 1", not the 0.95" that BMMF's calculation would yield. It is so because the chain rollers are always ½" apart in a straight line, not along the arc of the pitch circle. The 50t ring has a pitch circle radius of 101.13mm, not 101.07mm.

tl;dr

It's like reading The Times. Don't get it.

I'm no maths nerd. I just happened to use that approximate calculation when planning to replace a 53t with a 47t on a compact frame where there was a chance of the ST bottle bosses interfering with the correct (lowered) position. In the end, there was interference, but I just ran it a few mm too high, and fettled for a while with the cage angle until it worked okay.

I've gone back to the 53t on the aforementioned frame (with a larger cassette), and the 47t has moved to a bike where the front mech can be positioned correctly.

It's not much hassle to loosen the band a little and shuffle it up or down. But if you're buying new stuff, and there's a converter that allows ~6mm of vertical adjustment on the joining plate or whatever the technical name is, I suppose it could be considered 'neater'.

Are you going to be swapping rings much? It's a bit faffy.

Re swapping rings much- probably not, but one of the reasons I am getting the new cranks is because they have a removable spider, so you can have a 130 bcd and 110 bcd set of rings (53/39 and 50/34), and chuck the compact on when you want to disgust Hippy you go somewhere steep.

My girlfriend has a Dawes Duchess. She saw a Pashley with cream tires, and now she wants some. I've seen these Schwalbe Fat Frank ones which are ideal - in fact, I think they're the ones Pashley use on some bikes. But will they fit?

They come in at 2.35, and the bike runs V brakes, so there should be some room there. Just don't want her to order £50 of tires and find that they don't fit....

Cheers, ears.

http://www.sjscycles.co.uk/schwalbe-fat-frank-hs375-rigid-tyre-creme-26-x-235-(60-559)-prod22283/

Stock tyres on a Duchess are:
Kenda K-184 Eurotrek 26x1.3/8"

That's a different size from 26" (MTB), so you need to be on this page:
http://www.sjscycles.co.uk/tyres-26-(590)-dept199_pg1/

This is what you want:
http://www.theoldbicycleshowroom.co.uk/schwalbe-26-x-1-38-37-590-cream-classic-roadster-tyre-1833-p.asp

Cheers fella! How about these? http://www.thecyclewarehouse.co.uk/sch045.html

Same tyre.

~~any LBS workshop open on a sunday?

alternatively, anyone within reach of SW9 have freewheel removers I can come over and abuse /borrow? - need the 2-notch one and a lots-of-teeth Maillard one (suspect the latter may be elusive)~~

lmnh

This is what you want:
http://www.theoldbicycleshowroom.co.uk/schwalbe-26-x-1-38-37-590-cream-classic-roadster-tyre-1833-p.asp

Bog standard tyre found in Pashley indeed.

beward of the grip - they don't had any (as a customer found out when she tried to ride on the shop floor despite my warning).

I'm near hackney and need some coloured outer cable and a few M8 bolts...where shall I go.

I don't have office on my netbook, but I'd like to use excel.

Is there something like excel that you can download for free legally?

I'm running Windows XP.

I'm near hackney and need some coloured outer cable and a few M8 bolts...where shall I go.

I'm sure there are other places, but BLB on Bethnal Green/Brick lane, should be able to sort you out.

Thanks tiswas.

EDIT: Very retro!

Bog standard tyre found in Pashley indeed.

beward of the grip - they don't had any (as a customer found out when she tried to ride on the shop floor despite my warning).

With all due respect to my girlfriend, she won't be exploring the outer limits of grip and handling; more like gently rolling two miles each way to work at 10mph. And she doesn't really do cycling in the wet.

Plus, she never leans...