straight pull spokes -a 'new' idea?

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Brucey
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Joined: 4 Jan 2012, 6:25pm

straight pull spokes -a 'new' idea?

Postby Brucey » 4 Mar 2015, 8:49pm

It has long been speculated that there is nothing new in the world of bicycle design; as if further evidence were needed when I looked here;

https://www.flickr.com/photos/speedplaypedals/sets/

I found a picture of this straight pull hub
Image

which dates from 1898.... :shock:

So the next time someone tells you that straight pull spokes are all spangly, new and wonderful, you can tell them that they were an idea that was tried and fell by the wayside, well over 100 years ago.... :wink:

cheers
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colin54
Posts: 1365
Joined: 24 Sep 2013, 4:34pm

Re: straight pull spokes -a 'new' idea?

Postby colin54 » 5 Mar 2015, 12:37pm

,and what goes up might come down....

http://bikeretrogrouch.blogspot.co.uk/2 ... ew-11.html

MartinC
Posts: 1899
Joined: 10 May 2007, 6:31pm
Location: Bredon

Re: straight pull spokes -a 'new' idea?

Postby MartinC » 5 Mar 2015, 3:28pm

................and next a smaller freehub to take 7s cassettes with 11s spacing which fits on a dishless 130mm hub.,,,,,,,,,,,,,,,,

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CREPELLO
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Joined: 29 Nov 2008, 12:55am

Re: straight pull spokes -a 'new' idea?

Postby CREPELLO » 5 Mar 2015, 7:02pm

IT's also got an oversized hub shell for lateral stiffness, like most modern hubs have got (well at least that's what the blurb for modern hubs usually says).

Valbrona
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Joined: 7 Feb 2011, 4:49pm

Re: straight pull spokes -a 'new' idea?

Postby Valbrona » 5 Mar 2015, 8:42pm

CREPELLO wrote:IT's also got an oversized hub shell for lateral stiffness, .


I thought the oversizing was essentially to save weight, but it also seems logical that it would improve stiffness if it is considered that it is important for hubs to be stiff.
I should coco.

Thomas125
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Location: Telford, West Midlands

Re: straight pull spokes -a 'new' idea?

Postby Thomas125 » 5 Mar 2015, 9:30pm

Its got a grease port too. Not a bad idea at all. :D
Was 93.4kg now 78.3kg

Next target 74.0kg

"Life is one long bike ride" :-)

Keith Bennett
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Joined: 26 Jan 2009, 12:21pm

Re: straight pull spokes -a 'new' idea?

Postby Keith Bennett » 8 Mar 2015, 10:14am

When visiting a club mate who ran a bike shop in Marlow about 50 years ago he took me into the workshop and showed me a new front wheel that he had just built for his old ordinary (penny farthing) that certainly had straight pull spokes. And I remember racing in the late 1940s with a Baylis Wiley free hub intended to take three fixed wheel sprockets, screwed on, only three speed blocks were available in those days, however having a Father that worked in an engineering workshop I was able the get four sprockets on. There was an ex Italian POW that rode with the Chichester C.C. I believe his surname was Balloni often met up with in races at Goodwood who also used a BW freehub. "what goes around comes around"

Kaysbloke
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Joined: 2 Apr 2008, 2:35pm
Location: Wakefield, West Yorkshire

Re: straight pull spokes -a 'new' idea?

Postby Kaysbloke » 8 Mar 2015, 8:08pm

The Bayliss Wiley hub, taken from 'The Complete Cyclist' by R J Way published in 1951. The book is full of 'exploded' drawings of period components, all done by the author I presume and of excellent quality. Not quite 'Rebour' but not far off!

ComCycBWUnitHub.A.jpg


This version has 4 sprockets and 3 sets of bearings. I wonder why this ended up as the 'dead end' of hub development for some time until Shimano re-invented it. It seems much more mechanically efficient than the screw-on freewheel which became the market standard for many years. The axle is supported at both extreme ends in contrast to the screw-on hub which can have a large 'overhang'.
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Brucey
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Joined: 4 Jan 2012, 6:25pm

Re: straight pull spokes -a 'new' idea?

Postby Brucey » 8 Mar 2015, 8:28pm

actually that hub has four sets of bearings and the axle loading is similar to a campagnolo cassette hub, i.e. it isn't quite as good as it is with a shimano cassette hub.

I think the main problem with that hub could have been that it was quite expensive. Secondary issues include that whoever designed it wasn't thinking about access for drive-side spoke replacement; all the sprockets screw on so in the event that a spoke breaks you need to unscrew them all or dismantle all the freewheel (or hub) bearings. By contrast unscrewing a freewheel unit is looking a bit easier.

Had they (say) used splined sprockets (using the SA spline for example) it might have been a more successful product.

cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~