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Current Lead Times: Rider-Ready Framesets: 3 weeks. Full Custom Bikes: 7 weeks.

Building Your Titanium and Carbon-Titanium Bikes in the USA for 28 Years

The Life Cycle – Abridged Version

Long wooden crates at the garage door entrance

Every few weeks a freight truck wends its way down our steep, angled driveway to drop off two or three of these long wooden boxes. They contain raw titanium tubing in 18 foot lengths, all different gauges. The process of loading the unwieldy boxes onto a four-wheeler and moving them past the shipping department, through paint and into the machining area, one at a time, is something like a tugboat pushing a long cargo barge up the narrow, jagged length of the Mississippi River. It takes a strong sense of spatial relations and a fair amount of experience.

Wall of titanium tubing

The boxes get unpacked and the various tubes sorted by size into these vertical bays. This is our vault. This is our wine cellar. This is where the process of building a new bike begins, Matt O’Keefe standing here in front of the stock, a customer’s order in his hands, selecting the assortment of tubes that will go into their new bike.

A very long titanium tube poised to go into the lathe

We cut down the lengths to size, before butting each tube to give a very specific ride feel and handling characteristic. Then we miter the ends to fit together just so, tolerances hovering somewhere near the thickness of a human hair, the raw tubing shedding material in small increments, becoming a bike.

Titanium tubeset in a box

The modified tubes collect in small cardboard boxes, the frame builder working through a series of work cells, each with several mills or lathes in it, each set up for a very specific job, until the tubeset is complete. Then they get jigged up, so we can test the build against the frame drawing, refine any last details.

Mudhoney SL

Eventually, you get one of these. There are, as you can imagine, some important intervening steps, but this is the abridged version of the story. Suffice it to say we weld, machine, finish, polish and decal, before we get to this point. Sometimes we paint.

Barrels of titanium shavings for recycling pickup

What titanium doesn’t make it into the frame gets carefully collected in a barrel, building up over time into a strangely beautiful pile of titanium squiggles and spirals. The recycler comes by to pick these up and return them to the mill where the process starts all over, a closed loop of magic from which we extract custom bicycles.

The end..

Crafting Carbon

Diamas top tube with a filament wound 622 tube

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).

Fondo Manilla

Three fast Sevens, ready for speed

Seven is lucky to send bikes all over the globe. Our international family is one we grow and make connections with, despite culture and language barriers. Recently, our Philippine partner, George Carag from VeloCity Cartimar/DaDa Sports, sent us a series of photos from the Fondo Manilla Anniversary Ride.

The Fondo Manila Team has been hosting rides and tours throughout the Alabang, Cavite, and Tagaytay areas. The team is always searching for new and innovative ways to spread the joy of cycling to revive the camaraderie and bonding brought by the collective passion of its enthusiasts. All riders are welcome to these fully supported rides.

In early March of this year, the team commemorated its one-year anniversary by hosting a weekend of cycling on the best roads of Baguio: the Fondo Manila Baguio Series. Baguio was the chosen venue for having the highest point in the Philippine highway system, making it a befitting location to literally celebrate Fondo’s “A Higher State of Cycling.”

A group of Seven Cycles bikes were present and participated on this beautiful three day journey. Seeing the bond that this ride created between people proud to ride our bikes makes an impression on us here in snowy Watertown, MA. The places our bikes get to see is a testament to our philosophy that custom is possibility: bikes have no barriers or borders.

Fondo MaNiLa group photo

George at 7,400 feet

kitted out Sven rider holds up seven fingers in front of seven Sevens

Working with Titanium

Wall of titanium tubing

We wrote about steel the other day, and how the accepted wisdom regarding steel tube sets simply doesn’t match the reality. Today, we want to address titanium. Interestingly, while riders have believed for years that the type of steel a frame is made from is supremely important (we agree), they have simultaneously assumed that titanium is just titanium, that it’s all the same.

Nothing could be further from the truth.

Seven uses mainly US-milled, Cold Worked – Stress Relieved (CWSR) titanium in our custom frames. We do that because no other titanium available today has a longer fatigue life or higher tensile strength. We know that’s true because we have a fatigue tester here in our shop and regularly submit tubes to rigorous testing. Pushing materials to their breaking point is a great way of finding out how good they are, and our research indicates that the titanium we source is the strongest available and maintains that strength over significantly longer periods than the titanium available from mills in Asia.

We always want to use the best materials, because we want to build the best bikes, but we also have a commitment to lifetime warranties that prevents us from cutting corners with lower quality products. When  you buy a custom Seven, you put your faith in us to produce a bike that will fit like a glove, corner on rails and last forever. American CWSR titanium allows us to repay your faith with a frame of uncompromising quality.

Belgianwerkx – Signature Mudhoney Cross Racer

Belgianwerkx - Signature Mudhoney Cross Racer

New Seven partner shop, Belgianwerkx in Mequon, WI (just north of Milwaukee), wanted to do something special for their first floor demo bike. We think they succeeded. A steel Mudhoney, painted in their colors with Belgian flag accents, new HED Belgium rims, Cannondale crank, ENVE cockpit, the works. Nick Moroder, shop manager, said, “The handling is spot-on. SO responsive. And it’s unbelievably stiff for any bike, let alone just steel.”