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Posts Tagged ‘sturmey archer S2C duomatic hub’

just cruisin'

just cruisin’ around today ..

This red Speedwell Special Sports is the only one I have that came with its original mudguards. It’s easy to spot the original red colour from the parts of the frame that had cable clamps ‘protecting’ small areas from U.V. light. I believe it dates from 1957, going by the previous owners information. Serial number under the bottom bracket is V30907 and there is a smaller set of numbers ‘3447’ on the BB where it meets the left chain stay.

The paint has plenty of patina and could be considered only as fair condition for its age.

I’ve built it up as a 2-speed semi-light roadster though I think it would have originally been a 3-speed, the reason being that it looks to have once been fitted with a frame mounted jockey wheel for the gear cable.
The Sturmey Archer S2C rear and 1984 Chair low-flange front hubs have been laced to Araya 36H anodised rims for lightness and better stopping. These simple rims have a classic look with a shape that’s not too different from the original steel rims.

2 speeds and i'm kicking back ...

2 speeds and i’m kicking back …

I haven’t used a cottered crank on this one because I wanted a 42T chain ring for the 2-speed hub. This is because a 44T is a bit high geared for my liking on the 27″ wheels. The 22T rear gives me a 42×22 low gear with the equivalent of a moderate 42×16 high gear. The tyres are new Schwalbe ‘Active Line’ 27″ white walls.

shoot that golden arrow --- i can always change it back, but 42T is great on this

shoot that golden arrow — i can always change it back, but 42T is great on this

The crank set is Shimano ‘Golden Arrow 105’ with a 42T Surly 130 pcd stainless steel chain ring. A 113mm JIS square taper bottom bracket gives a nice close clearance and a good chain line on this bike though that’s a much narrower axle than would be used on a derailleur bike with double rings on these cranks. At the moment the pedals are MKS Sylvan, but I’m soon going to fit some original Phillips, once they are overhauled.

phillips - that's more like it !

phillips – that’s more like it !

An early owner has painted white ‘visibility’ sections on the front and rear guards that I won’t be trying to remove. The only frame surface treatment I gave was gentle cleaning and a sparing layer of beeswax conditioner. Any past attempt I’ve made to brighten the candy paint on a special sports hasn’t been successful, so this is all that I do now.

morning glory

morning glory

Most of these Special Sports frames have 54cm seat tubes and around 59cm top tubes. Because the frames are a bit low for me I find them somewhat unsuitable for drop bars unless the stem is set high, so I’ve fitted this one with ‘Oxford’ style bars.  The little bell is stamped ‘Speedwell Cycles’.

The bikes have either 26.8 or 27mm seat posts and this one is a new alloy one – I’ve toned it down a little with some shellacked cloth, otherwise it looks a bit too obvious.

I could have fitted the original Monitor ‘Ventura’ steel front brake but instead decided on a ‘Cherry’ brand alloy. The problem with fitting a later brake is that the flat section of guard isn’t long enough to avoid the nose of the calliper touching the guard, but this one just fits. I did fit a small piece of rubber from an old tube between the calliper and guard to stop them rattling together. These brakes aren’t brilliant either, but combined with the coaster do a reasonable job while not looking too out of place.

For the moment the saddle is a Brooks Flyer in antique brown with a matching B4 frame bag and Shellacked Cardiff cork hand grips. I’ve fitted my PDW Take-out basket as I thought was it rather appropriate for this sedate old cruiser… and the brass badge from “Tommy Mac’s” was from my grandfather’s collection, as he used to work at their Newcastle store – possibly he was there around the time this bike was made.

Thomas McPherson & Sons

Thomas McPherson & Sons

Happy Re-Cycling !

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old faithful ..

old faithful ..

I’ve made a couple more changes here – firstly the bars and stem, where I’ve refitted the early Cinelli stem with a set of steel Alps bars.

The bars are a little wider to give me better steering leverage and alloy bars don’t look right with this stem. Also, as the ( roughly ) 11mm Cinelli stem hex bolt head was rounded off, I have replaced it with an allen head bolt, hopefully not offending any purists in the process.

complete with twined bottle cage

complete with twined bottle cage to hide the modernity

I am a bit fussy about the bar tape on this bike and can only seemingly tolerate the texture and colour of this brown Brooks bar tape However, it’s quite thin if wrapped along the full length of this narrow diameter bar. My way of making things more comfortable here is to very much overlap the tape around itself for the drops and ramps, and then use heavily wrapped cotton tape for finishing off the tops – which I then shellacked.

The result is more thickness – i.e. comfort – but without the clashing newness of modern tape. I think the effect is nicely ‘retro’, not least because the tape is somewhat deformed due to being re-fitted and removed several times !

Used alone, I find plain cotton tape to be a bit harsh on the hands.

the sturmey-archer s2c

the sturmey-archer s2c

The second alteration was to fit a Sturmey Archer S2C Duo-matic kickback hub, and because I like the classic look of the Alesa alloy rims that were already fitted, I spent an afternoon dismantling the single speed coaster wheel and re-lacing the S2C. There were two hesitations here and they are worth thinking about. One is the weight of the S2C, it seems heavier than even a typical 3-speed like the Nexus 3C. The other is the loud freewheel noise it makes compared to a silent single speed coaster hub. This is particularly noticeable in top gear when coasting Moving the pedals back a bit here will help make conditions less noisy.

Regarding the weight, at least the wheel is no heavier than the original all steel 700A that it replaces !

The top ratio, as in the S2, is 138% of normal gear, and that 38% is a pretty big jump ! To work it out, if you begin with a 22T cog such as supplied with this hub, then that will be your normal ( lower ) gear. Your high gear will be roughly equivalent to a 16T on the same front ring. In this case with a 46T the gear inches are approx. 56 and 78.

It’s better than single speed, but either gear is not always low enough nor first always high enough. Changing the front ring alters both ratios of course, and one needs to personally decide whether to set it up for spinning or grinding, or possibly both !

the old school 'millbrook' saddle bag..

the old school ‘millbrook’ saddle bag..

The beauty of this hub, though, has to be the “zero cables” thing, and there’s a whole lot to be said for that on an old bike such as this, in terms of uncluttered appearance and simplicity of operation. The Speedwell Popular models only came fitted with coaster brakes as far as I know and I’m still reluctant to fit a front brake even though I know it would make sense.

The other plus is not having to mash the pedals so much at low speeds, thus making life easier for the old knees, while retaining a top gear that won’t spin out so soon.

Purists please note that the original wheels have been safely stored away for future re-fitting… but the relative lightness of these alloy wheels with modern tyres is hard to ignore.

Even so, the extra weight and laid back geometry is hard to get used to after stepping off the ‘criterium style’ quick handling Vectre. Ah well, all in good time …

greetings from the land of the summer Christmas

greetings from the land of the summer Christmas

Christmas Greetings !

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