The Long Story of the Introduction of the Balance Control System and the Mobius SL and KellCat SL Dual-Suspension Mountain Bikes

This photo was taken on the road to Lake Garda, in Italy, last year. The bike is an Evergreen Scrambler. This is a long way in both time and space from the introduction of our first new dual-suspension bike in a decade, but this is how bike design is sometimes. This story starts with a vacation.
Strictly speaking, we had been working on ideas and working through the preliminary engineering math for a new dual-suspension design for about two years, but it was a trip to the Mountain Bike World Championships in Lenzerheide, Switzerland that catalyzed the real work behind the bike that would become the Mobius SL.
Ironically, we flew into Venice, a city where you’re not allowed to ride a bike, before making our way north to Lake Garda for a few days of riding before the races in Switzerland. The lake is surrounded by old stone architecture, sweeping green vistas, and perfect dirt roads. We spent hours crisscrossing the vineyards there, occasionally daring to point our noses up the precipitous climbs that snake away in every direction. It is always inspiring to encounter the rawness of nature via bike, and Lake Garda served up a huge does of inspiration.
The four hour drive to Lenzerheide took us past seemingly endless green pastures and more road climbing than our legs will get to in this lifetime.
In Lenzerheide, the long arch of product development began. It might seem like fun and games watching the best racers in the world doing impossible and exhilirating things in the dirt. We spent hours looking at bikes designs, suspension kinematics, prototype components, and how various suspension approaches worked and didn’t work in all kinds of terrain, traction, and trail conditions.

Seven’s new suspension platform, the Balance Control System (BCS), is a direct result of exploring every aspect of how racers and riders use their bikes in all kinds of conditions. Professional level racing is one part of the spectrum. BCS is a design platform for custom dual-suspension bikes, which lets us bring the same level of rider-specific tuning to suspension performance we bring to road feel. It incorporates the proven, workhorse, four-bar linkage system and updates the kinematics for today’s mountain biking styles, not to mention our ability to customize and tailor bikes in unique ways.

The result isn’t one bike, but a platform for creating the perfect bike for your style of riding and personal preferences.
We launched the first BCS bike, the Mobius SL at NAHBS, because who wouldn’t want to build show bikes AND release a new model for the same event? In addition to the ribbons we won for Best Road Bike and Best Gravel Bike, the Mobius SL was also a finalist for Best Mountain Bike, so as crazy as months have been leading into Spring 2019, it has all been very worth it, and we returned from Sacramento with smiles on our faces and a feeling of proud satisfaction.
All of that leads up to the second BCS dual-suspension bike, the brand new KellCat SL. KellCat is a collaboration project with pro mountain bike racer Kelly Catale, who came to use looking for the fastest cross-country, dual suspension 29er we could make.
Kelly worked with us through the first two prototypes of this bike, and after coming to understand her riding style and settling on her race geometry, we immediately set about machining the solid aluminum rockers for this bike. Like the Mobius SL, the KellCat SL is hand-crafed at the deepest level, from the dropouts through the rockers, and up through the double-butted titanium frame.
KellCat SL launches right now! Kelly will race it at Sea Otter this weekend, and we’ve put together a few different versions of her bike that you can order now if going fast on tight, technical terrain is your idea of fun.