"SONIC boom" (aka Yokel-Motion 2.0)

Regarding price, there were a few sets of FC-7400/1/2 at the NCC jumble last weekend, asking£35-60, depending on condition, originality of rings, and if they had original dust caps. Maybe deliberately avoid any sets with dust caps as these inflate the price for collectors.
I bought an FC-7402 in summer to use on my HHHCB, via eBay, from Italy (couldn't find elsewhere with caps at the time, rings OK), and cost about £35 + £7 P&P.
I can verify the Q (with a Token 103mm BB) is 133mm-ish. Certainly less than 135 once torqued.

Thanks for that: getting to jumbles is not easy for me unfortunately.

Yes I'm hoping to bag orphaned, scruffy arms to keep costs down.

Fortunately shortening isn't too pricey: £28.90 including postage both ways.

I bought a pair of ebay.de and I have seen other pairs there regularly

Yup I've found a couple of pairs there, but a bit pricey (at least until I can sell the 7410).

I need to measure the Sturmey Archer cranks on my Pearson, they feel narrower than my S75s.

Just read back up the thread to see @mdcc_tester mention Omniums at 135mm.
I've a set of these I'm looking to part with (silver, 165mm, recent BB); just taken off the same HHHCB. Putting feelers out before listing so PM if you're interested.

Sturmey Archer cranks

At first I was like...

... but then I was like £35!

I suppose it might be an idea to shorten something cheap and readily available, before butchering anything nicer.

Thanks but they're too pricey.

Not sure how suitable they'd be for shortening either.

I have them in black on the Pearson, plenty of people have confused them for S75s in the flesh and I certainly can't tell the difference (bar the perception of lower Q).

NB I think there's two versions, I have these:

http://www.singletrackbikes.co.uk/m7b387s406p32381/Sturmey_Archer_FCT62AA_TRACK/RS_GB/70682?gclid=CjwKEAiAt_K0BRCzjtv92_HGoR0SJAA9QNn_RVvAdnzUlHO-FiK1l3hdO835kll3-PeybJ5-RAmStBoCzenw_wcB

Ah!

740x are cheaper and they're 144mm PCD: my 56t are 130mm and 135mm.

6207 (600EX) and 6400 (Tricolor) look to be contenders too, as they both take 11something BB.

6400 is the front runner being both cheap, plentiful and mundane: those 740x are really much to pretty to be chopping up.

The advice I was given was to choose wheels & tyres based upon CdA at the front and Crr at the rear.

So a wide rim at the rear is called for, but how wide is too wide?

Browsing the Planet X sale, I found these Pacenti CL25, TL28 and DL31 at a very tempting <£25 posted...

but how wide is too wide?

Wider than your seat tube is probably over the top :-)

That was my guess, so TL28 it is!

I thought it really was my lucky day, with Planet X hubs a tenner (before discount), until I spotted that (contrary to the photo) they only have fronts.

A quick search for 36h System Ex/Novatec rear hubs mostly finds "out of stock", except for Ali Express at $50.

I was going to bag the rim now and wait for PX to get some more stock: I'm not missing something, like 36h hubs having been outlawed, and will end up paying through the nose for a hub am I?

A quick search for 36h System Ex/Novatec rear hubs mostly finds "out of stock"

A slightly less quick search finds SJSC have 36H SystemEx in stock for £29.99

I did see that, but SJS are always a bit toppy.

I've written to PX to see if they have any idea when they'll have rears back in stock.

I don't know when Malcolm will be building again, so I'm not in a desperate hurry.

In other news, I've just bagged a pair of 7400 cranks for a reasonable £45 shipped (from the US).

They're 165mm though, which are quite scarce so I won't be getting them chopped.

They'll do in the short term and once I have some shorter ones, they'll go on YM 1.0.

They're 165mm though, which are quite scarce so I won't be getting them chopped

There should be enough room to make a 1"×24TPI hole at 160mm in place of the 9/16"×20TPI at 165mm to fit some PD-7300s :-) There's a tiny bit of damage to the crests of the 1" thread on one side, it's not fatal but you can avoid it completely by going to 161mm

1 Attachment

Malcolm as in Borg? must be, hes up your way. Had a bit of a crash i hear. In a similar predicament finding 24h track hubs, saw the planet x deal... 'balls its only a front' . Then cycle clinic and i saw he had some but £30 ea.

Yup.

If PX don't come good, then I don't mind giving him £30: it'll actually work out cheaper than getting them shipped from SJS and then onto Malcolm.

Loving the CAD work, but no. :(

http://www.ebay.com/itm/BDW-2014-Track-Hub-Bolt-on-type-Fix-Fix-Single-Speed-20H-24H-28H-32H-36H/231846072739?_trksid=p2047675.c100011.m1850&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20140602152332%26meid%3D139e9b101ffc414aa361ffc5724e1ed7%26pid%3D100011%26rk%3D1%26rkt%3D2%26sd%3D231552486877

Probably more aero too.

I like that the axle conversion has already been done, but still £30-odd.

Have you got your hands on one: whenever they mention chainline, they stress that it's with their sprockets, which may or may not be significant...

I have the old version on my skidder and that version on my HC bike, haven't checked but chainline hasn't seemed out...

they stress that it's with their sprockets, which may or may not be significant...

Their sprockets look pretty normal, they've obviously just copied the interface dimensions from Novatec