bendo
Viscount
Posts: 538 
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Post by bendo on Dec 6, 2014 7:24:27 GMT
As a fan of the single chainring (a main feature of my High-Performance Gentleman's Town Bike) I was quite excited to see SRAM revisit this idea in a very interesting and not completely stupid way.  Originally designed for mountain bikes, it apparently is catching on in the cyclocross world. There are a number of clever features that make it work, but check out that 10-42 tooth cassette!  I wonder would it be possible to re-create this system in a more 'Viscount-friendly' manner? b |
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Jem
Viscount
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Posts: 3,390
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Post by Jem on Dec 7, 2014 17:22:05 GMT
I'd be interested , but it would have to look good - that's pretty high on my criteria.
If you do any research and trials please let us know how you get on.
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Post by velocipete on Dec 7, 2014 17:36:32 GMT
What's the O.L.N. with that set up? I think it may be a stretch to far for a Viscount frame.
It's the lower gearing that I require these days.High,well,there's casettes with 11 teeth top,
but,try getting a Campag with more than 28!Personally I don't like Sram.Plasticky nastiness.
A bit like Simplex really.You can't mix and match to much either.Yes with some Shimano stuff,
but no in their upper market gear.
Long cage Suntour Vx Gt,14-34 Suntour Winner free wheel,nice triple on the front,not fussy as
long as it's got a Suntour front mech and friction shifters. You could go vertually anywhere
in the world with this set up,and back!!!
Oh,and it would be a damn sight cheaper!
Cheers,
Pete.
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bendo
Viscount
Posts: 538
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Post by bendo on Dec 7, 2014 22:04:39 GMT
This is the bit I like the best, the chainring profile. Apparently they fit any chain, but every second tooth is close to being cross-shaped in cross-section, to that they fit more snugly into the wider link space in the chain. Also, the teeth are longer than normal. I know this is important because every time my chainrings wear out on Victor, they start to throw the chain off during gear changes, especially when there's a lot of chain slack from changing to the small cogs on the back. stwww.bikemag.com/files/2012/07/Teeth.jpgUnfortunately the chainring-crankset interface is proprietary, as are the rear hubs apparently. Still, there's future hacking potential there I reckon. b |
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Post by 54roadie on Mar 12, 2015 6:26:02 GMT
My caliper says the distance between the rear dropouts on my ASP is 127mm. A threaded rear hub, appropriate axle, and an old SunTour Ultra 7 freewheel will get you there. I see U-7 and U-8 cassettes and matching hubs on eBay that will likely do better. Any SunTour long cage rear mechanism, and the correct bar end shifter would look pretty clean, IMHO. With the longer chainstays on our beloved Viscounts, any SS crankset (TA, anyone?) will work just fine. I've run 8-9 speed chains on similar set ups and was thrilled with the shifting.
This might sound like sacrilege, but if you've shark toothed your porthole 52T chain ring, consider filing off the teeth, and using whatever TA inside ring you want. The porthole ring is now your super exclusive chain guard.
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