02 October 2014

50 Years Ago This Month: The Dawn Of SunTour

What is the most influential and important development in the history of the bicycle?

Some would say, well, duh, it's the invention of the bicycle. I might agree, except that it's hard to pinpoint when, exactly, the bicycle was "invented".  Is Leonardo da Vinci responsible for it?   Or, do you consider the "celerifere" the first in the line of two-wheeled vehicles we love to ride to day?  Some might say Karl von Drais de Sauerbrun, who attached a steering device to his two-wheeler, is the progenitor of our pleasures.  Then again, others would have us believe that it wasn't really a bicycle until Kirkpatrick MacMillan attached foot pedals to it.

After the invention of the bicycle, however you define it, probably the most important development--and certainly the one most influential beyond the world of cycling--is that of the pneumatic tire.  Without it, not only bicycles, but also motor vehicles, would give slower and bumpier rides than wooden- or metal-wheeled horse-drawn carriages.  And modern passenger aircraft could not take off or land.

Possibly the next-most important development is the invention of the "safety" bicycle.  It's what we (well, most of us, anyway) ride today:  two wheels the same size (or close to it), foot pedals and a front chain that drives a rear cog via a chain.  This type of bicycle replaced the high-wheeler or "penny farthing" bikes, on which the pedals and cranks were attached to the front wheel axle.  The gear ratio was, therefore, dependent on the size of the front wheel:  Common diameters were 60 and 72 inches.  On the "safety" bicycle, variable gears were possible.

Variable gears led to inventors coming up with various ways to use them, the most common of which are variable-gear internal hubs (e.g., the Sturmey-Archer three-speed hubs found on classic English bikes) and derailleurs.

About the latter:  The patent for what is, arguably, the most important innovation in derailleur design was filed fifty years ago this month in Japan, and a month later in the US.

Here we can see it advertised in the December 1964 edition of New Cycling magazine:





It's the SunTour Gran-Prix derailleur, the progenitor of every single derailleur with even the slightest pretense of quality made during the past few decades.


This brainchild of Nobuo Ozaki, SunTour's chief engineer at the time, the SunTour Gran-Prix introduced the "slant parallelogram" design to the world.  The derailleur's main parallelogram is more or less parallel to the chainstay, in contrast to those of Campagnolo and Simplex derailleurs, which dropped straight down from the frame mount and were almost perpendicular to the ground--or those of Huret derailleurs, which consisted of flat steel plates that pivoted on the mounting plate.




Such a difference is not merely stylistic:  It allowed the top pulley of the Grand-Prix to run as close to the smallest cog as it did to the largest, or any in between.  Shifting thus became easier and more precise, especially on wide-range touring gears.  People were amazed at the difference when they replaced their malfunctioning or broken Huret Luxes,  Campagnolo Gran Turismos or Simplex Prestiges with something from SunTour.  I know I was.




Without a way of keeping a constant distance between the derailleur pulley and the rear cogs, it's all but impossible to make any sort of indexed derailleur system work reliably.  Ironically, this fact would lead  Shimano and Campagnolo (and, later, SRAM) to claim supremacy over the market SunTour would dominate from the mid-1970's until the mid-1980s--and, ultimately, to SunTour's demise.

Practically the second SunTour's patent expired in 1984, Campy and Shimano (and Sachs-Huret, which would become part of SRAM) seized upon it.  The following year, Shimano introduced SIS, the first commercially successful indexed derailleur shifting system.  The rear derailleur from that system combined SunTour's slant parallelogram with the spring-loaded top pivot Shimano (as well as Simplex) had already been using in their derailleurs.

Notice that I said SIS was the first commercially-successful indexed derailleur system.  It wasn't the first indexed system:  The idea was tried as far back as the 1930's (the "Funiculo" derailleur on Jacques Schulz bicycles), and in 1969 SunTour introduced an indexed system that, by all accounts, worked well. 

Had SunTour waited a couple more years to market that system, they might have dominated the bicycle components industry even more they did in the 1970s, and they still might be in business today.  However, the "Honor" and GT derailleurs-- refinements of the Grand-Prix--and the "V" series were introduced just as the '70's Bike Boom was starting in North America.  New cyclists (like yours truly) in the New World had no previous brand loyalty, if you will, to any of the established European derailleur makers and were more willing to try something that looked (and, more important, worked) differently.

Interestingly, this led to a reversal of an old dynamic:  A few years later, European cyclists (some, anyway) would take the lead of their American counterparts and start using SunTour (and, later, Shimano) derailleurs and other parts. 

Anyway...After Shimano introduced their indexed system in 1985, other companies--including SunTour and Campagnolo-- panicked and introduced their own systems. Some of us referred to Campy's "Syncros" system as "Stinkros".  SunTour's system shifted a little better, but not as well as Shimano's, which consisted of a more closely-integrated set of components.  Essentially, Shimano designed a whole new system, while SunTour and Campagnolo simply created new indexed shift levers that were supposed to work with derailleurs and freewheels those companies were already making.

What made matters worse was that bike manufacturers, like Schwinn, equipped some of their models with SunTour's indexed shifters but used them with freewheels, chains and cables--some of which weren't even made by SunTour--they already had on hand.  It almost goes without saying that the results ranged from underwhelming to disastrous.

(Also, the fact that Schwinn's reputation was already slipping didn't help to bolster confidence in the components they used on their bikes.  That's my opinion, anyway.)


SunTour finally redesigned their indexed systems, but it was too late.  The company managed to hang on until 1995.  By then, nearly all bikes of any quality had Shimano derailleurs--which had the same geometry as the SunTour derailleurs Nobuo Ozaki created three decades earlier!

(He was, apparently,  much better at industrial design and engineering than anyone in the company was at translating.  One of their early manuals, useful as it is, tells us "How To Use Honor Rightly".)










01 October 2014

Sorry I Haven't Been Along For The Ride

One great thing about being middle-aged is that you can be excused, for a moment anyway, of un-hipness.  (Is that a word?)

One symptom of un-hipness is not knowing about some band or another.  Back in the day, one could be excommunicated from some of the circles in which I traveled for such a "crime".

(Back in the day, one also could have been excommunicated from said circles for using the third person and passive tense as I used them in this sentence and the previous one!)

So...Ring your loudest bell as you blow by me as I am pushing my aging bones along the bike path.  I am now going to confess that I didn't know about The Bicycles, a Toronto-based "indie" rock group.



Then again, I have a really good excuse for not knowing: "Indie" rock is like, you know, soooo '90's.

30 September 2014

Nice Old Cranks

Some of my favorite vintage components are Stronglight cranksets.

You might thing I'm being sentimental about the days when I was young, carefree and riding my PX-10.  Well, there are some things I miss about those days, though I have no wish to repeat them.  But more to the point, I have good memories of the Stronglight 93 crankset that came with that bike because it really was very nice.

I loved the shape and mirror polish of it.  Even more important, though, was its practicality:  Chainrings from 37 to 58 teeth were available for it. In a way, it was a precursor to today's "compact" road double cranksets.  So, they were commonly ridden, not only by racers, but by tourists with relatively light loads or who simply didn't want to deal with the finicky shifting and other issues that came with triple cranksets.

What was probably an even nicer--and, to my eye, even prettier--crankset was the "99" model.

 


It wasn't readily found here in the US, and not many bikes came equipped with it.  But it offered an even wider range of chainrings than the 93:  from 28 to 54 teeth.  In the late '70's and early '80's, six was the maximum number of freewheel cogs; seven would be introduced in the middle of the '80's.  That meant the steps between cogs were wider than on today's 8, 9, 10, 11 or 13-cog cassettes.  Consequently, most in-the-know touring cyclists rode with a "half-step plus granny" chainring setup.  That meant, in brief, a relatively small gap between the two larger chainrings and using the smallest available chainring for the "granny" gear.

A common "half-step plus granny" setup included chainrings of 28, 45 and 50 teeth.  The Stronglight "99" was ideally suited for it.  It had a larger bolt circle (86BCD) than the company's "49" model. the Specialites TA Cyclotouriste or the Nervar touring cranksets, all of which used a 50.4 BCD.  Smaller bolt circles mean, at least in theory, more chainring flex.  The 49, Cyclotouriste and Nervar crankset compensated with an extra ring of bolts to hold the two outer chainrings together.  On the other hand, the "99" had only one set of five bolts holding the chainrings onto the crank.

No one seemed to notice any undue flexing on the "99"--or a near-copy of it made by Sakae Ringyo (SR) in Japan.  The SR model was, functionally, the same and a good deal less expensive.  But the Stronglight cranks seemed to be of higher quality and were more beautiful.

So what happened to the "93" and "99"?  Well, the former crankset became the "105" and "106"--the same cranset with an anodised finish and "drillium" chainrings.  There was also a "drillium" version of the "99".  But the real reason why we don't see more modern versions of those cranks is that they had proprietary bolt circles:  122 mm for the "93" and, as I mentioned, 86 mm for the "99".  In contrast, Campagnolo racing cranks, and their clones, had a 144 mm diameter, while Dura-Ace had the now-ubiquitous 130 mm.  Meanwhile, Sugino's touring cranksets came with the now-familiar 110 mm for the outer two chainrings and 74 mm for the "granny" gear.


That means replacement chainrings for the "93" and "99" can be found only on eBay and at swap meets.  The good news is those chainrings tended to be long-wearing, more so than TA's rings.