Sure, I knew the old frames built with the top Reynolds, Columbus and Tange tube sets were a bit lighter, and were highly coveted by experienced riders. Weight matters to a certain degree, but the frame alone is far less than half of the total weight of a complete bike. And as far as being highly coveted, I figured those poor saps doing the coveting were just victims of marketing and hype.
I've slowly been outgrowing that belief over the past few years, but I recently had a massive growth spurt when I had the opportunity to compare two bikes that were very similar in every way except for the tubing they were built with. Remember that racy Trek 560 that I bought a couple of years ago? I loved riding that bike, but finally came to the conclusion that it was a size too small for me. So, I put all of the original parts back on it and put it up for sale on Craigslist.
The plan was to replace it with another Trek 560 of the right size once I sold it. Serendipitously something even better came up on Craigslist almost immediately after I sold the 560.
Say hello to my "new" 1985 Trek 760.
When I bought the Trek 760 its original Campy Victory parts were long gone. The guy I got it from had bought it as a bare frame and built it up with a mostly meh assortment of early 90s Japanese components. I decided to strip it bare and rebuild it with all of the parts that had been on the Trek 560. This gave me a rare opportunity to compare two frames with the exact same components so I could get a good feel for the differences between the frames.
So, with the 760 rebuilt the differences between the two bikes came down to this:
- The 760 is a size bigger than the 560 (the 760 is a size 56cm, and the 560 is a size 21" or 53.34cm)
- There are slight differences in geometry between the two models.
- The 760 is built with Reynolds 531C tubing while the 560 is Reynolds 501.
The size and geometry differences look like this (the 560's numbers are in the red box in the top section and the 760's are in the lower red box):
The head tube angle is a fair amount steeper on the 760, but other than that differences are either attributable to the different sizes (i.e. the 760 has a longer top tube and seat tube), or they are extremely small and probably not significant.
So what about the difference in tubing? How is Reynolds 531C different than Reynolds 501? According to the 1985 Trek brochure, there are differences in tube wall thickness.
The top tube's walls are thinner, the down tube's are a little thicker and the seat tube's are thinner in 531C as compared to 501 tube set. There are also differences in how the tubes are manufactured and the composition of the steel, but those differences supposedly have little impact on the strength or ride quality of the finished bike. There's some weight difference in the tube sets, but the difference is negligible when it comes to a fully built bike. Both bikes weigh about 22 lbs ready to ride with peddles and everything.
On paper this all looks pretty trivial to my inexperienced eye. I expected these two bikes to ride very similarly. I doubted that I would even be able to tell them apart in a blindfold test. Not that I would ever try riding blindfolded!
So, the next Saturday morning after building up the 760, I went for a good long ride...
By the way, I had ridden the 560 just a week before so its ride quality and handling characteristics were still pretty fresh in my mind. I rode 70 or so miles on some of my favorite roads that day with lots of ups, downs, twists, turns, smooth pavement, rough pavement and even a bit of gravel.
The difference between the 760 and my beloved old 560 was mind-blowing!
As I've said before, I loved the ride of that 560. Everything about it was quick and precise. When you jumped on it, it took off. The downside was that you could feel every pebble and crack in the pavement, and the handling required constant attention.
On the 760 I instantly noticed a smoother and more stable ride. There was little of the jarring and buzzing that I had come to associate with the 560. The ride quality was more like my Cadillac-like Trek 614 than it was like the 560. And the handling of the 760 had all of the quickness and precision of the 560, but with less effort and attention required. I never felt like I was having to force it into a tight turn. The handling was more intuitive and invisible than on any other bike I had ever ridden.
Talking about ride quality and handling characteristics of bikes is a little like wine reviews. It can be a lot of meaningless hyperbole that is really just trying to say either "I like this" or "I don't like this." So rather than try to use up a bunch more words explaining my perceptions, I'll just say this: I found my new Trek 760 to feel very different than my old 560, and I really liked the difference.
Since that first Saturday ride, I've ridden the new 760 a few hundred more miles. I'm still a bit blown away every time I get on it. It's by far the best riding bike I've ever owned. It has very clearly taught me that one lugged steel frame is not like another, even if they may look very similar on paper.
What accounts for the differences? I'm still not sure. It could be attributed to the different tube sets, but I suspect it's more complicated than that. That's one of the things I love about bikes. They are amazingly complex for such simple machines.
"Just like women" says a friend of mine.
