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 King and Us

We (and our customers) are in the very fortunate position of being able to choose what parts we put on our bikes, so it’s no surprise that we choose to work with companies who share our passion for quality, durability, and simplicity.

Chris King Precision Components has made bicycle components since 1976, focusing on those same principles. Like us, they take a ground up approach, engineering and manufacturing their own bearings, specifically for bicycles, right in their own factory.

Over the years, we’ve seen their headsets go from frame to frame. We’ve seen hubsets survive jarring crashes and seemingly intolerable conditions. These are parts that have carried their riders to   Tour de France podiums and World Championships in the dirt, but they also go on Sevens every day. We are proud to work with Chris King and put their headsets, bottom brackets and wheelsets on our bikes.

When you make good things for people, things that last, they reward you with loyalty. King has earned that sort of loyalty over their 40 years in the bike game. A touch of color pressed into a head tube or that distinctive angry bee hub sound lets you know you’re riding with a King devotee. It’s a loyalty born of those bedrock beliefs in value, quality, and performance, values we share and deliver with every bike.

Introducing Project RedSky

red-sky-axiom-sl-sideA red morning sky tells sailors that bad weather lies ahead. Project RedSky is our way of making all the bad weather days rideable, no, not just rideable, maximally rideable, lovable, to turn those rainy, snowy, off days into your favorite days to be out on the bike.

Here’s how we did it:

  • Lightweight:  A typical RedSky builds up at 1.5 to 2.0 lbs lighter than an equivalent disc brake bike.  The bike is the same weight as any lightweight road bike; the mid-reach brake calipers are only about 30 grams heavier than most lightweight short reach brakes.  The bike pictured tips the scales at 16.2 lbs with the MSO 32c tires; without pedals.
  • Tire Choices:  From a 23c road slick to a 33c knobby and everything in between, the RedSky is even more versatile than a true cyclocross bike.  On 33c tires, clearance is limited, but tire option versatility will be appreciated in some riding conditions.  True tire clearance depends on measured tire width, rim width, and brake caliper choice.  Perhaps most importantly, the RedSky can also fit studded tires.
  • All Weather:  Designed to fit fenders with up to 28c tires.
  • High Performance:  This design sacrifices nothing compared to any performance road bike.  It’s fast, agile, and accelerates with the best of bikes.
  • Optimal Handling:  Seven’s 5E fork allows for matching the fork rake to the frame geometry so there’s no compromise to the bike’s front end handling.
  • Hidden Fender Mounts:  At dropouts and chainstay bridge.  The mounts are there when you want them, but hidden when you don’t.
  • Travel Bike:  Simple brake system makes for fast, easy, and lightweight bike travel.

red-sky-axiom-sl-down-seat-clusterOverall, the Redsky provides you most of the benefits of an Evergreen — a versatile mixed-terrain disc brake bike — while being as light as a pure performance road bike. Designed specifically for harsh environments, the RedSky loves the rain, sleet, and even snow and ice.  Boston sees an average of 80 rain days a year; why miss that many days of riding?

The RedSky will make everyday a riding day.

What defines RedSky is its versatility. No other rim brake bike offers the same breadth of tire choices, rack and fender options, lighting possibilities.  We’ll show you, in the coming days, just a few of the ways you can build your Seven RedSky.