The Sevenduro 2×2 Scrambler

Well, that’s a mouthful, but it’s a bike with a LOT going on. The basic idea with this project was to build a massively versatile machine that can maximize performance across a range of ride types. The knock on some multi-purpose bikes is that they’re not great at any one thing. The 2×2 Scrambler aims to be great at many types of riding.

Here is what it’s for and how we optimize for each thing.

For this specific design project we optimized for these two distinct ride functions:

  • A bike ideally suited for fast gravel and dirt road riding in hilly terrain (Sevenduro mode)
  • A bike optimized for New England mixed terrain riding: sections of singletrack with equal sections of paved roads — and a bit of everything else thrown in (Scrambler mode)

These two bikes are very different in function, and therefore design. How do you get this to work? Beginning with tire choice and wheel diameter decisions, the optimal design produces a frame geometry that allows for versatile rider position, fine tuning for each type of riding.

With this Evergreen 2×2 we have two hot-swappable modes. The first configuration is a pure gravel riding setup for the 700c wheels, we call it the Sevenduro Mode — because it’s designed for endurance gravel rides. It’s lightweight and provides a perfect gravel balanced rider position.

For the second hot-swap configuration we’ve optimized for 650b riding. We’ve tagged it the Scrambler Mode — named after a type of bandit off-road motorcycle race. The Scrambler Mode has a flared drop bar for better trail handling, wider grip stance for more control, a shorter stem for slighter reach and improved body language control, and slightly higher front end to facilitate rolling over logs and other adventure obstacles.

There is a ton of new tech in this bike, features that make it a great travel bike, a worthy race bike, an all-weather commuter and adventure rig. Read more on the specifics here.

Portable Technologies & a Workhorse Axiom Disc

In our last post we walked through some of the features and technology in the Ultimate Axiom Disc. Halo bikes, like that one, serve some important purposes for us. The first one is to showcase, in as dramatic a way as possible, the killer bikes we’re capable of producing. More importantly, they serve as launching points for new ideas that we know we’ll incorporate into more “practical” builds, like the one above.

This is the Workhorse Axiom Disc. It incorporates the show bike’s One-Inch Fixed Chainstays, Active Race Design Geometry, and All Out Speed Kit into a more budget-oriented, everyday riding (and maybe racing) package.

Don’t get too hung up on the racing piece. The vast majority of our riders aren’t trying to win races, but they do want to go as fast as they can, given their abilities. We understand. It’s fun.

What we want to do is develop technology that is portable, across bikes and categories, whether full-tilt race bike, or go fast group ride bike.

The Seven Ultimate Axiom Disc

This is the Seven Ultimate Axiom Disc, a project bike we developed as part of this season’s focus on technology, innovation, and leveraging the experience of building more than 30,000 custom bikes. For this particular project, the design goal was build the fastest, lightest, no-compromise road disc bike we could. As a result, this bike introduces a slew of new features that are available in our mainline products starting immediately.

Here is a quick look at just a few of those features:

One-Inch Fixed Chainstays  – Larger diameter tubes, with thinner tube walls, increase both bending and torsional stiffness by 32% over our 7/8″ stays. We hold the weight down by custom butting the tube stock in house. Read more here.

Asymmetric Fastback Dropouts – 75% stiffer than the most popular titanium thru-axle disc brake dropout on the market. These custom asymmetric  dropouts save 60 grams of weight over our conventional disc brake dropout system. Read more here.

3D Traction Seat Stays – With 3DT, we’ve been able to improve rear tire traction without reducing frame stiffness. We achieve these traction improvements through a combination of more aggressive bend profile, bending in multiple planes (3D), and a new tube butting process. What you get is a seat stay with a more dramatic shape that dissipates multi-directional force, and minimizes weight. Read more here.

Synergetic Chainstays – When you introduce asymmetry into a frame design, you have to restore balance. Our Synergetic Chainstays serve this function. Their unique design allows clearance for full-sized chainrings and 28c tires. They let us run a sub-41cm chainstay with a 160 mm disc rotor. Read more here.

Active Race Design Geometry – ARD geometry is a combination of race-specific elements that provide quick handling and telepathic transfer of rider input to your tire contact patches. We achieve this through a combination of frame geometry modifications including a compact wheelbase, short chainstays, high bottom bracket, steeper head tube angle, tighter front center, more compact front triangle for faster reaction time, improved front end torsional stiffness, and a bike that’s easier to throw around in a shoulder-to-shoulder pack of riders. Read more here.

All Out Speed Kit – Where Seven’s Active Race Design geometry option is a comprehensive set of geometric adjustments, the All Out Speed Kit modification is a set of design features that improve race performance and placing. Our most popular titanium AOS Kit includes our One-Inch Fixed Chainstays, an oversized down tube, a T47 bottom bracket, a Max Power Seat Post, Slipstream Di2 Internal Wiring, and a 44mm head tube. Read more here.

Direct Mount Derailleur Hanger – This is the industry’s first titanium direct mount hanger for Shimano rear derailleurs. About three times stiffer than a typical aluminum hanger, and tough as nails.​​​​​​​

The Numbers

As you can imagine, at a company whose name is Seven, numbers play an immeasurable part in everything we do. The name Seven, just to get this out of the way first, is a product of our desire to build bikes to be ridden on the seven continents, a lucky number, a prime number, and even as a word, a symmetrical combination of letters that looks good on a down tube.

The 622
The 622

Taking a step backwards to six, the first number in the name of our category defining 622 SLX, we find carbon, the sixth element in the periodic table. Carbon fiber is the defining element of the 622 line of bikes. It brings elemental lightness to those bikes. High frequency vibration, radiating up from the road or trail, disappear between the fibers.

Now jump forward to twenty-two in that same table, titanium, the metal that launched our bike building careers. Five times the strength of steel at the same weight, titanium moves with a rider like nothing else. It flexes and returns microscopically, soaking up the lower frequency jolts that push beyond carbon fibers range. Titanium smooths the ride, keeps your tires connected, spares your muscles. It won’t rust. It holds a shine like little else.

A Long History of Photo-Taking
A Long History of Photo-Taking

Nineteen is another prime number. Nineteen is the number of years Seven has been building and delivering bikes. Our second full decade is there on the horizon. And, with apologies, we are primed to do our best work. This year’s R&D effort will produce a slew of new products, new bikes, new forks, new frame components. We have already begun planning limited editions for our anniversary, already begun gathering the ideas that have been developing over those decades.

There are so many more numbers, too. Too many to call out, the lengths and angles of every rider-specific frame we’ve designed, more than 30,000 of them, the number of bike and component companies we’ve partnered with, the hundreds of bike builders we’ve been fortunate enough to train and learn from in return, and of course, all the riders, many of them with two, three and more bikes they asked us to build for them, maybe the most important number of all.

Wheel Test – Paris-Roubaix Pacenti Luxe Disc Wheels

???????????????????????????????We’ve been looking for good go-to disc wheel for mixed-terrain riding. It’s a category with a number of entrants, but few products that really hit the mark. So we connected with Justin Spinelli at Luxe Wheelworks and Kirk Pacenti at Pacenti Cycle Design for a set of Pacenti’s own rims laced to White Industries hubs with Sapim bladed spokes.

They proved very durable and, at 24 hole front and rear, they manage to strike the right balance between weight and strength for us. Certainly we were impressed with them over the 54km of cobblestones at the Paris-Roubaix Challenge last weekend, not to mention the 14 hour mixed-terrain odyssey we did around Paris a few days before. We did both these rides without a broken spoke, dent or even a flat tire.

???????????????????????????????We rode them with Challenge Paris-Roubaix 27mm tires, similar to what the pros ride, to really put them through their paces. Justin had promised us that we’d have no problems, that they’d be bulletproof, but the cobbles of northern France have crushed all sorts of wheels (and spirits). We were impressed enough with them that they’ll become the default wheel for our Evergreen line in the coming months.