08 May 2015

Jobst Brandt R.I.P.



Late yesterday, I learned about the passing of Jobst Brandt.


As “The Retrogrouch” and others have pointed out, he had a rare combination of skills and talents:  vast and deep technical knowledge, and the ability to communicate it clearly in everyday English that those of us who are less technically-oriented can understand.  He’s one of those people who didn’t let all of his theoretical knowledge get in the way of pure and simple common sense. 
 

Because of his qualities, he—whether or not it was his intention—helped to create, along with the late Sheldon Brown and a few others—something I’ll call, for lack of any other term, a communal wisdom base for cyclists.


For generations, cyclists in Europe (especially England and France), Japan and other places learned about places and ways to ride, and which equipment was and wasn’t worth buying, from their local clubs or other experienced cyclists they’d meet.  In the US, that infrastructure, if you will, was all but lost during the decades between World War I and the 1970’s Bike Boom.  There were a few who kept the flame flickering.  But if you wanted to find out what Fred (!) DeLong had to say about tires or gearing, Dick Swann’s ideas about frame structure and geometry or John Forester’s wisdom about cycling and traffic safety, you had to be near a bike shop or newsstand that had copies of the magazines in which they were published, or a library that had their books.


In other words, cycling in the US was basically a sea full of ships passing in the night.   As often as not, you learned what you learned by having the fortune to chance upon the right people (or publications) at the right time.  Such was the world I entered when I first became a dedicated cyclist during the Bike Boom.


What made this situation difficult for new cyclists was something I didn’t understand at the time, or for many years afterward:  While the advice and wisdom your fellow riders shared with you was, usually sound, as it was based on experience, it didn’t come with a cogent explanation of why it was so.  Either the cyclist who gave it to you couldn’t analyze it technically, or he (the type I’m about to describe was usually male) was a “techie” who was on the frontiers of the autism spectrum.  I’m thinking now of a cyclist in my first club, a brilliant engineer who was the first person I saw riding a fixed gear outside of a track.  He proselytized for his setup but couldn’t explain the benefits of it in a way that made sense.

Jobst Brandt leaning over
Jobst Brandt



When someone like Jobst Brandt discussed, for example, wheelbuilding or particular wheel components, you’d come away understanding wheels and their components better than you did before.  And the knowledge he imparted helped you to understand, among other things, why that newest boutique wheelset was probably a waste of money for you and just about anyone else who has to pay for his or her own equipment.  


Although he tended to favor the best classic equipment over the latest thing, I think “The Retrogrouch” is correct in saying that he’d bristle at being labeled a “retrogrouch”.  He didn’t praise vintage stuff just because it was vintage.  (If you don’t believe me, read what he says about Sturmey-Archer three-speed hubs.  And he was talking about the ones that were made before Sun Race took over SA!) Moreover, he wasn’t averse to trying to improve what was already available:  After all, he designed Avocet Fas-Grip tires, still some of the best road rubber many of us have ever ridden.  


In brief, the man knew the difference between real technological innovation and the mere appearance of it.  In making that difference clear to us, he allowed us to see how rare true technological innovation actually is (something he, as an engineer, no doubt understood better than most other people) and how the appearance of it is turned into marketing hype.


Arthur Godfrey was an avid hunter who later became an ardent conservationist in an era when such a conversion was all but unheard-of.  A reporter once asked him why he still displayed the animals’ heads and other hunting trophies.  “To remind me of how stupid I once was,” he replied. 

Likewise, I save my mangled Rev-Xs, Kysriums, carbon forks and other techno-junk to remind myself of how ignorant I was before I encountered Jobst Brandt.  I’ll miss him. So will countless other cyclists.

07 May 2015

Shifting Gears--Literally

When I first became a dedicated cyclist--around the time that the '70's North American Bike Boom was peaking--all derailleur-equipped bicycles had gear clusters (freewheels) that screwed onto the rear hub.  

Cinelli Bivalent Hub, circa 1961



That is, all of the derailleur-equipped bicycles I saw.  I'd read and heard about the Cinelli Bivalent hub, which was produced for a few years during the 1960's.  Other than that, I believed, there was only one sprocket system for derailleur-equipped bike, and your only concern was whether the hub had British, French or Italian freewheel threads. 

And, as far as I knew, the first departures--apart from the Bivalent--from such a system came around 1980, when Maillard introduced its Helicomatic system and Shimano came out with what was then called the Freehub.

Shimano 600 Freehub system, circa 1981


Shimano's system was essentially the same any of today's hub-and-cassette systems, save for those of Campagnolo, which have a different spline pattern.  The only major difference between those early Freehubs and today's Shimano and SRAM ensembles is that the on old Freehubs, which had six cogs, five cogs slid onto splines and the smallest one screwed on, acting as the lockring.  On current hubs, all of the cogs are joined as a cassette that mounts on the splines and is held in place by a separate lockring.

Helicomatic.  From a 1984 Peugeot brochure


When I first saw the Helicomatic, I actually thought it was a better idea than the Freehub.  I still do, and I think it's a better concept than any of today's hubs with cassette bodies.  The problem with the Helicomatic--as with another "revolutionary" French component of the time, the Huret Duopar derailleur--is that while it was a great concept, it wasn't well-executed.  Maillard offered lower- and higher- priced models of Helicomatic, and they suffered from the same problems:  soft helical spines (the "bayonet" mount) that often gouged or stripped, rather weak axles that frequently broke and, on the racing model, smaller-than-normal ball bearings that caused the cones and races to wear quickly and, in a few cases, "explode."

But the Bivalent, Helicomatic and Freehub were not the first systems to depart from the screw-on freewheel cluster.  Just recently, I became aware of another, which also employed its own unique rear derailleur.

In the early 1930s, Alex Shuttleworth and William Hill paptented the TriVelox system.  It had three rear cogs--which was all most derailleurs of the time could handle.  It also used a 1/8" pitch chain,  in contrast to today's 3/32" derailleur chains.  

But most improtant of all, the TriVelox derailleur--unlike those of today--shifted gears by moving the sprockets rather than the chain.  Apparently, the sprockets were fitted onto splines, much like the Helicomatic or Freehub cassettes. And the derailleur remained fixed while the freewheel block moved sideways on the hub.



Why was such a system developed?  It was a response to, as Michael Sweatman of Disraeligears says so eloquently, "a peculiarly British fixation with chainline".  British cyclists, by and large, shunned derailleurs--as they would until the 1950s--because using them meant running the chain out of line on the extreme gears (small chainring with smallest rear cog or large chainring with largest rear cog).

As Sweatman tells us, they had a point.  Roller chains are meant to run in a straight line.  Thus, while riders in Albion had an exaggerated fear of the friction incurred by running a chain out of line, they were correct in believing that chains wear out more quickly when they're run out of line, let alone bent and flexed when shifted on conventional derailleurs.

Bicyclists of that time had good reason to think about longevity:  Chains were comparatively much more expensive than they are now.  That is why people were more fastidious about keeping their chains cleaned and lubed--and why many bikes came with oil-bath chain cases, something that couldn't be used with a derailleur.

The TriVelox system did what its creators intended.  Walter Greaves rode such a system for 45,000 miles (!) in one year and used only two chains and two sets of sprockets.  In other words, his chains lasted about ten or fifteen times as long as a chain made for a current 10- or 11-cog system.

TriVelox seems to have been in production for about two decades.  It was never a mass-market item, but it had its following, particularly with tandem riders.  One reason why it didn't become more popular is that it was much heavier than conventional derailleur/freewheel/hub combinations.  Another is that the system required a very wide rear axle to accomodate the sliding freewheel system. That, of course, limited its development to three speeds because additional cogs would have required an even bigger axle.

But most important of all, by the 1950s, most dedicated cyclists were realizing that derailleur systems were reliable and practical, and would allow for more than three cogs without widening hubs or axles.

I came across a TriVelox set on eBay.  I'd be very curious to see it--and other predecessors of today's cassette-and-hub systems--up close.

 

06 May 2015

What Do You Turn Over In Your Garden?

During my rides over the past few days, I've seen more and more people gardening.  That makes sense, given that the weather has been warming up and we've had a lot of sunshine. 

We've all seen bicycle baskets used as planters.  As I'm learning, there are all sorts of ways bikes and parts can be used as garden structures.

Possibly the most ingenious is this trellis made from bicycle wheels:

spokenchain.
From The Homestead Survival