Seven Design Philosophy – Understanding Chainstays

Seven Cycles offers a variety of chainstay styles, each with their own unique features and benefits. Our most popular designs include our Inline stays and Chopped stays.

The popular perception is that chainstay length is one of the most important factors in bike design because stay length affects bike handling, acceleration, climbing ability, and descending stability. While it’s true that chainstay length has an important impact on all those aspects of a bike’s character, stay length is only one factor in more than 200 design parameters that go into developing an ideal bike.

Anytime we put too much emphasis on one design element at the sacrifice of others, the result is a sub-optimal riding experience.

Read THIS for a deep dive on Seven’s design philosophy for optimal chain stays.

Snowward Bound – The Four-Season Sola 2×2

We look forward to a good snowfall, especially one that sets up overnight leaving a fresh, untouched blanket in the local woods. Having just released the Four-Season Sola 2×2, we were anxious to get it out into some “conditions,” and our New England weather obliged.

We opted for 27.5″ x 3″ tires and our Seven Adventure Bar. Snow riding calls for keeping your weight back and balanced over the wheels. This was a heavy snow and the temperature was high enough that what was on the ground had a high ice content. We didn’t let that bother us, snaking in and out of familiar trails made entirely new by sagging of branches and obscuring of rocks.

The bike was flawless, a perfect match for the pristine pre-dawn. Rides like this both exhaust you and recharge your batteries at the same time.

The Four-Season Sola 2×2

Design Mission: Create the most capable four season bike possible. As cyclists we are keenly aware of the weather and the many challenges it presents. Any cyclist who lives in an area that experiences four true seasons, like our home here in Massachusetts, will want a bike capable of tackling whatever the weather throws at them.

After building about a dozen variants of a year-round bike, we packed all our experience and research into this one broad-use, high-capability bike.

For summer and fall, with 29er mountain tires, the bike is a fast and agile race-ready bike, setup for technical single-track and short, punchy climbs. In the winter and spring, with 27+ 3” tires, the bike can do anything and go anywhere, with or without studs, in snow, ice, mud, or frozen terrain.

See more photos and read all the details here.

 

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.