Showing posts with label touring bike. Show all posts
Showing posts with label touring bike. Show all posts

09 September 2023

A New Bike-Packer—Or A ‘90’s Mountain Bike?

Because I am in, ahem, midlife, I am old enough to have owned and ridden a mountain bike made around the time Rock Shox, Marzocchi, Manitou and a few other hitherto-unknown companies were bringing internally-sprung front forks to the general public.  A few bike-makers were developing frames with suspension in the rear triangle. But that feature, and suspension (what Brits called “telescoping”) front forks were still extra-cost options or modifications.

At that time, in the early-to-mid-1990s, mountain bike frames like my Jamis Dakota typically had 71 degree head angles, which are a bit more slack than road frames (73-74 degrees) but more aggressive than ‘80’s machines that, like the balloon-tired bikes from which they evolved—and many of today’s “hauler” and “rough stuff” bikes—had angles ranging from 69 all the way down to 66 degrees.

Bikes like my old Dakota, I believe, were attempts to inject some road-bike responsiveness into mountain bikes, some of which were, frankly, sluggish. But those bikes from three decades ago were comfortable and stable enough that they were often used for loaded touring (sometimes after switching the flat handlebars for dropped bars), as Trek and other bike-makers stopped making dedicated touring bikes around 1988.

Well, someone at the Dutch bike company Van Nicholas seems to have ridden—or simply recalls—one of those mountain bikes. Their new Nootau, billed as “the ultimate bike-packing machine,” is built around a titanium frame with a geometry nearly identical to a just-before-suspension off-road bike.




Of course, the Nootau’s componentry has almost nothing in common with what was in use around the time “Smells Like Teen Spirit” blasted across the airwaves. Like most of today’s new bikes, it has a threadless headset and stem, which were available but not standard.  But, unlike the cantilever brakes on vintage mountain bikes, disc brakes stop the Nootau.  Discs enjoyed brief popularity, mainly on tandems, during the late 1970s and have been revamped during the past few years.

Perhaps the most striking difference, however, between the Nootau’s equipment and that of vintage mountain bikes is in the drivetrain: the Nootau has no derailleurs. Instead, its single-sprocket crankset is mated to a Rohloff rear hub with 14 internal gears. (I’m trying to wrap my head around that: I’ve had Sturmey Archer and Shimano three- and five-soeed internally-geared hubs.

I may not have the opportunity to ride a Van Nicholas Nootau. I must say that I like its look—and relish the irony of how much its design resembles that of my old Jamis Dakota.

26 September 2015

SunTour's Achilles Heel

We all have heard of the "Achilles heel":  a weakness that causes the downfall of an otherwise strong person or thing.

We have all heard--probably from a junior high school teacher--the origin of the phrase:  After giving birth to Achilles, his mother Thetis tried to make him immortal by dipping him into the River Styx.  As she dipped him, she held him by his heel--which, of course, remained untouched by the magical waters.

Until I read the Iliad for myself, I--like most people--assumed the original myth about Achilles said that his weak spot was his heel.  However, the Iliad identifies his weakness as his pride; the first story to say that his weakness was in a part of his body was Ovid's Metamorphoses, published more than a millenium after the Iliad.  Roughly half a century after that,the Roman poet Statius was the first to imply that it was his heel.

Practitioners of traditional medicine all over the world have said that pride, as well as other emotions such as anger, manifest themselves in the body.  Perhaps, then, it's not a stretch to say that organizational pride or overreach can become the "Achilles heels", if you will, in the products they make. 


Image result for SunTour VGT derailleur
SunTour VGT-Luxe rear derailleur,  circa 1973


Such was the case with a bicycle part from a company that had enjoyed enormous success for two decades.  From the time SunTour introduced the slant-parallelogram rear derailleur in 1964, it took both the original-equipment and replacement-parts market by storm; by the end of the 1970s, the traditional European derailleur manufacturers commanded only small niches of the bicycle market.

But there were clouds on the horizon for SunTour.  For one, its patent on the slant parallelogram would expire in 1984.  Other derailleur manufacturers were waiting with bated breath; practically the minute the patent expired, Shimano would incorporate SunTour's design into its SIS derailleurs. Campagnolo would follow suit when it developed its first intergrated indexed shifting system.  


Image result for Huret Duopar
Huret Duopar rear derailleur, circa 1981


Another sign of trouble preceded the end of its slant-parallelogram patent:  Huret's introduction of the Duopar rear derailleur.  Frank Berto, who had so lavishly (though not unjustly) praised SunTour derailleurs for the better part of a decade, pronounced the Duopar as the best wide-range touring derailleur available.  The majority of SunTour's market in the 1970s and early 1980s was bicycle tourists and other cyclists who wanted and needed wide-range gearing.  The Duopar represented the first viable threat to SunTour since its first GT derailleurs were introduced during the late 1960s.

There was, at least, a silver lining in the Duopar cloud:  Huret's new wide-range touring derailleur indeed shifted flawlessly over the widest gearing available at the time--at least, when it was new.  But its double-parallelogram (hence the name Duopar) design necessitated more robust materials and construction than Huret offered.  So, it would rather quickly develop play and slop in the joints, especially if it was ridden in rain and mud, and would typically last about 2500-3000 kilometers.  

SunTour wanted to re-establish itself as the go-to derailleur company for dedicated bicycle tourists.  While the Duopar shifted better--when new--than any other wide-range derailleur, it wasn't that much better.  Apparently, the designers at SunTour figured they could develop a derailleur that would out-shift and out-last--and, by the way, look more elegant than--the Duopar.


The folks at SunTour, I imagine, also must have been thinking that such a derailleur would take the then-nascent world of mountain biking by storm:  the Duopar was simply too fragile, and the derailleurs Shimano made at that time didn't shift nearly as well.


SunTour Superbe Tech, 1983


So, in 1983 SunTour came out with the Superbe Tech rear derailleur.  Like the Duopar, it had a double pivoting system.  The difference was that, instead of a second set of pivoting  parallelograms attached to the main one (as the Duopar had), the Superbe Tech featured a spring inside the upper pulley wheel.  That meant, of course, that the pulley wheel had a much larger "drum" than the upper pulley of any other derailleur and was therefore not interchangeable even with the pulleys of other SunTour derailleurs.  

But its sizing isn't the only thing that made it an "Achilles heel."  The spring was not adequately protected from dirt, mud, rain or anything else one might encounter. So the spring and pulley drum would become clogged, which in (relatively short) time would cause the pulley wheel to seize, and the spring to fail.  Even the most dedicated shop mechanics couldn't fix it--or the fully-enclosed main parallelogram, which had even more complicated internals. 


click to enlarge
The spring-loaded pulley wheel helped to make the Superbe Tech the best-shifting derailleur available--when it was new.  But, after some use, the pulley wheel  would seize up and turn the derailleur into a paperweight.  



In trying to defend itself against an onslaught from its competitors, SunTour created a derailleur with a sophisticated design and elegant appearance that indeed shifted better (in part, because it eliminated the need for cable housing) than any other derailleur--when it was new. However, just as Thetis didn't think to dip her son a second time to ensure that his heel would be soaked with Stygian water, the folks at SunTour apparently didn't go back and correct the weakness inherent in their new design.  So, in trying to protect themselves from the threats imposed by Huret and, later, Shimano, they made themselves vulnerable in a seemingly-small area.  

While the Superbe Tech's flawed pulley wheel did not, by itself, cause the demise of SunTour, many in the world of cycling believe it was where SunTour suffered its first debilitating wound. 

02 March 2014

A Conversion That Should Have Been 650B, Perhaps



Today I am going to recall another bike from a respected one-man builder.  Like my LandShark, it didn’t have his name on it. In fact, when I acquired the bike, it didn’t have any name on it at all.

After deciding that my Raleigh Competition was too big for me—and wanting a bike I could ride on paths without getting a mountain bike (At the time, mountain bikes were still clunky.)-- I ended up with an accidental conversion.

Frank, my old boss at Highland Park Cyclery, had a Ross Signature frame.  Now, you might ask, “Since when was Ross a one-man operation?”  Actually, it never was.  However, for a time, they contracted builder Tom Kellogg to build a series of bikes that would rival the best of any other builder.  Like Trek, Ross seemed to have designs on becoming the Great American Bike.


A Tom Kellogg bike.

In spite of its high quality and the sort of clientele to whom HPC catered, the frame gathered dust.  It may have had to do with having been painted a color (grayish-green) nobody wanted.   Also, the bike frame, which was built for touring, didn’t have braze-ons for cantilever brakes, racks or shift levers (or cable guides for bar-end shifters:  STI and Ergo were still a decade or so on the horizon).  It also had only one pair of braze-on mounts for a water bottle cage.

Frank sent the frame back and asked for braze-ons.  By that time, Kellogg was no longer working for Ross.  For all Frank or I knew, the bits may have been brazed by whoever welded Ross kids’ bikes.   The frame came back painted in a pewter color, which I rather liked, and with the requested braze-ons: for a rack, a water bottle cage and cantilever brakes.  The latter were exactly where they should have been on the frame—for a 26” mountain bike wheel.

The only problem was that the frame was built for 700 C wheels. So, the there was more vertical clearance between the seat stay bridge or the front fork crown and the tires than on just about any other bike I’ve ever seen.
That would have been great if it were possible to ride large studded tires.  However, that wasn’t possible because the clearance between the chainstays (at the bottom bracket) and the front fork blades was too narrow for a true off-road tire.  They could have accommodated, at most, a tire 38C (1.5 inches) wide, which was still wider than most touring cyclists (at least here in the US) were riding at the time.

 So I set up the bike with some of the earliest mountain bike “slicks” from, if I recall correctly, Tioga.   Later, when Avocet introduced their slicks with inverted treads, I switched to them:  They may have been the best city/commuter tires ever made.  And I installed fenders.  There was enough space between them and the tire treads to ride a Worksman Cycle through.

I used that bike as a commuter and on a couple of longer trips—including the one I took when I stormed out after an argument I had with Eva.  A lot of people gawked at it:  It was the bicycle equivalent of a platypus.  But I really enjoyed it:  Certainly, it turned out to be one of the more versatile bikes I’ve owned.  But, after about two years, it met its untimely demise at the rear end of a taxi behind Penn Station. (“And lead us not into Penn Station..”)

By now, you may be thinking what I’m thinking:  What if that bike had been a 650B conversion?  Given the state of bicycling and the bike business of that time (ca. 1986-88), I don’t think that whoever brazed on those cantilever brake bosses had even heard of such a size.  Rims and tires of that size were not available in the US at that time and were even, by that time, difficult to find in Europe. 
I tried to find a photo of that bike.  It really was like nothing else you’ve seen or ridden.

After I crashed it, I got the Miyata 912 I mentioned in an earlier post. Both of those bikes were worthy companions to my Colnago Arabesque.

30 November 2013

Never Again. Unless....

Every time I swear I won't do something ever again...

Someone gives me a plate of nachos or chocolate chip cookies.  Or a ridiculously cute kittie needs a home.  Or I meet someone and start dating.  Or I teach.

All of those things have happened within the last year-plus.  But I'm not going to write about them now. Instead, I'm going to tell you about another "never again" pledge broken.


Yes, I've taken on another bike project.  This Trek 720 is a hybrid, as best as I can tell, from the early or mid-90s. It's heavy, at least compared to the bikes I have.  And while it's made of chrome-moly tubing--probably straight-gauge--it's has plain welds at the joints:  nothing fancy, but seemingly intact.

(During the early and mid-1980's, Trek made a loaded-touring bike that was also called the 720.  It was a lugged frame made from Reynolds 531 tubing and had multiple braze-ons for racks and water bottles--and for center-pull brakes.  About the only nicer touring bikes at that time were made by Mercian, Jack Taylor and Alex Singer.  Trek discontinued the touring 720 in the late '80's and introduced the 720 hybrid in 1990.)

I got a deal I couldn't refuse. I'm partly Sicilian.  I'm supposed to say stuff like that.  Really, I got it for nothing.  On it, I installed a stem and rear derailleur I've had for ages.  And a seat post I've had lying around, in 26.6 mm diameter, seems to fit.

I'm going to put it together, as I find parts.  Then I'll decide whether to use it as a "combat" or "feed to the sharks" bike, or to sell it or whatever.  Then I'll never, ever take on another restoration or rebuilding project, ever again.  Really.