Articles – Page 58 – Seven Cycles

Titanium/Carbon Mixes – The Best of Both Worlds

If you were to take a carbon fiber tube and wrap it against the wall, then hold your ear to it, there would be little if any sound emanating from the tube. If you did the same test with metal, it would sing like a tuning fork. The same holds true for frames, metal sings and carbon whispers. These two qualities make for very different experiences on the road. Carbon bikes, like our Diamas line, make pitted and potholed roads feel like you are pedaling over wall to wall carpeting; smooth, with very little feedback. Metal bikes, like the Axiom, Resolute, Sola, and Mudhoney, on the other hand, provide constant feedback keeping you in tune with the surface of the road. Once we start customizing and manipulating tube sets, we can alter how compliant or how stout the frames will be, but the material dictates how the road’s vibrations will be relayed to the rider.

There is a gap between whispering and singing, and to some, that’s where the perfect bike resides. By adding carbon tubes to a titanium frame, or vice versa, we can fabricate a bike that hums, bridging the gap between the two materials.

The idea of a titanium frame paired with carbon seat stays for the intended purpose of soaking up road vibrations was a notion that Seven pioneered and first implemented with the Odonata back in 1997, and though there have been some updates and improvements the same basic model exists today, now known as the Elium SL.

The ride of a ti/carbon bike is so pleasant, that we offer them in road, cross, and mountain bike disciplines.

Crafting Carbon

We have covered steel and titanium in recent posts. Now it’s time to talk carbon fiber.

Our approach to carbon fiber is fundamentally different than the one taken by most production bike builders, who focus primarily on the lightness and stiffness of carbon. While those are both positive characteristics of the material, we believe, in any rider-specific bike, they have to be balanced against the needs for the bike to fit properly, handle well and last a lifetime.

Though we are sometimes perceived as exclusively a Ti frame builder, we are working with carbon fiber every single day and have been for many years. We have, at this point, built thousands of custom carbon and Ti/carbon mix frames. Carbon fiber is a material we value highly for its aforementioned lightness and stiffness, but also for its natural vibration dampening characteristics. So whether we’re building an all carbon Diamas, or a mixed material machine like the 622 SLX, we always focus on why carbon belongs in the design, and then work to maximize its benefits.

There are two basic types of carbon tubing that we work with. One is round carbon tubes, like the ones we use in our Elium line, the 622 SLX and the Mudhoney PRO. These tubes are built to our specifications for diameter and wall thickness. By mixing and matching a wide array of round carbon tubes, and mating them to titanium lugs, we can tune the stiffness and handling characteristics of mixed material bikes in much the same way we do with our all Ti frames.

The other type of carbon tubing in heavy use at Seven is shaped. Just as we have an array of round carbon tubing, we also keep a significant selection of shaped tubes on hand for use in our A6 carbon line. While the outside diameter and appearance of the tubes remains constant from model to model, the wall thickness varies, altering the performance characteristics of each tube. Cut, mitered, wrapped and bonded in house, our shaped A6 tubes give us complete customizability of fit, handling, and road feel (within the range of possibility for carbon).

Love to Ride – The Photographers – Dave Chiu

Dave Chiu is one of those guys who is very hard to pin down. He is a hyper-talented photographer, as evidenced by this shot we used in our Love to Ride brochure, but to speak only about Dave’s photography is to ignore all the other things he does, including graphic design, web development, travel, high level racing and generally kicking ass a collaborator and friend.

In recent years he’s shot the Tour as well as a number of legendary domestic races like the Tour of Battenkill. You can check out some of the best of that work at his website. This picture of mad genius mechanic Matt Roy gives a tiny, intimate peek into the life of a pro wrench, prepping a race bike for his wife, Seven sponsored Mo Bruno Roy.

Video – Green Mountain Double Century 2012

The Green Mountain Double Century is a singular sort of endurance event. The 2012 version was 215 miles, 80% on dirt roads, with 26,500ft of climbing. There is a time cut off of 40 hours. Theoretically, it is a race, but such is the challenge that many ride just to finish.

The inaugural event, in 2011, saw about a dozen riders start, and only four finish. Three of them were from the Ride Studio Cafe Endurance Team, John Bayley, David Wilcox and Matt Roy. They finished in just short of 19 hours. The 2012 version saw the RSC team, all on Ti Sevens, “win” the overall again, shaving three hours off their previous best time. These guys are all randonneuring legends who keep raising the bar for the endurance cycling community. We were incredibly honored to have them all on our bikes.

Natalia Boltukhova of Pedal Power Photography, who shot most of our Love to Ride brochure as well as the photo above, traveled with the winning team in both 2011 and 2012, putting together this photo set and this video, which captures the brutality (and humor) of the event beautifully.

GMDC 2012 from Natalia Boltukhova on Vimeo.

Claire’s Axiom SLX

This is Claire’s Axiom SLX. We designed it with help from our good friend Chris Richardson at Bike Doctor of Waldorf, Maryland.

Claire sent us this picture of the complete build, and said, “I’m quickly falling in love with my new Seven! It’s an amazing bike. You were right, Neil; the paint looks awesome and I’m happy with the final choice. My initial impressions after 2 rides: light, agile, stable, lively, and effortless.