SIX
FIN
ITY

Infinity. To the
Power of Six.

Made to make mountain bikers faster.

We exist to make mountain bikers faster. This mission filters everything we put out there. Since 1985 we’ve learned that when we help riders win at the highest level, it translates to riders at every level. With Sixfinity, we have a breakthrough suspension that leverages learnings from all historic designs to yield a pinnacle system that can be tuned for wins in all the ways. For every rider. And every ride.

Tyler Waite Special Projects DH

Complex engineering.
Clear results.

YETI / FOX Factory Racing has piloted Sixfinity to the junior World Cup DH podium, placed top 5 in elite World Cup DH, won multiple E-EDR races, and went on to win the 2024 E-EDR World Cup title. While championship-level results are one thing, consistency is a whole other bag. Sixfinity delivers. 

A Lesson in
Kinematics.
A Lesson in
Speed.

Sixfinity gives riders unprecedented traction, composure while pedaling and superior efficiency. Bold statement? Yes, but consider the facts. Unlike any other platform we’ve ever experienced, its unique six-bar design allows endless tunability for all platforms and assist levels – from DH to eMTB. 

Whether acoustic or e-powered, Sixfinity can precisely control acceleration and deceleration responses, while tailoring leverage rates for the intended use case. All with executional fidelity few can achieve. 

A New Way to
Reach Infinity.

The unique “switching motion” of Switch Infinity is still alive and well with Sixfinity.  

As the Switch Link moves up, pedaling support is provided where desired, with a higher anti-squat centered at sag extending across the pedaling zone. As the Switch link moves down, the anti-squat sharply drops off for descending performance. 

Though it’s some seriously advanced movement that was anything but easy to achieve, it delivers anti-squat magnitudes tunable to the bikes intended use, that makes pedaling crazy efficient. And it also offers a sharp drop in anti-squat at point in the path where pedaling is rare, but unencumbered travel is key.  

Yeti MTe Rocker Link
Yeti MTe Timing Link
Yeti MTe Switch Link

Rocker Link

Initiates shock and critical connection point for timing link to drive Switch link

Timing Link

Rotates around rocker link pivot to drive direction of the Switch link

Switch Link

SEAMLESSLY CHANGES DIRECTION AT INFLECTION POINT. KEEPS ANTI-SQUAT HIGH INITIALLY, THEN DRAMATICALLY REDUCES ANTI-SQUAT WHEN YOU NEED IT MOST.

MTe
160e
SQUAT % ANTI 0 MTe ANTI-SQUAT (32T) 30 60 90 120 145 VERTICAL WHEEL TRAVEL [mm] 0 100 50 50 100 150 INFLECTION POINT SAG PEDALING ZONE 132% 32-10 105% 32-52
SQUAT % ANTI VERTICAL WHEEL TRAVEL [mm] 30 60 90 120 145 MTe ANTI-SQUAT (32T) 0 0 100 50 50 100 150 INFLECTION POINT SAG PEDALING ZONE 32-10 132% 34-52 105%

Unique bikes.
Unique leverage curves.

The right magnitude for the job.

With Sixfinity, anti-squat magnitude drops sharply at the point in the travel where riders want to prioritize downhill performance and can benefit most from a near zero number. Because Sixfinity lets us customize anti-squat for each given use case, every Yeti gets the anti-squat magnitude that works best for the bike.

Where our mid-travel bikes pedal best with more, our full-powered eMTB rocks a lot of watts, and needs less. What about the anti-squat number for special project DH bike? Let’s just say it’s also unique, but like all Sixfinity bikes, we can easily scale anti-squat magnitude for the use case of the bike.

Anti-Squat
%
26.7

Change across entire cassette range at sag

Anti-Squat
%
105

At Sag

MTe ANTI-RISE 0 30 60 90 120 145 VERTICAL WHEEL TRAVEL [mm] ANTI-RISE % 20 60 40 80 100 SAG INFLECTION POINT 64% 69% 61%
MTe ANTI-RISE 0 30 60 90 120 145 VERTICAL WHEEL TRAVEL [mm] ANTI-RISE % 20 60 40 80 100 SAG INFLECTION POINT 64% 69% 61%

Balanced geometry & traction.
Composed under pressure.

Sixfinity doesn’t lose composure under braking. With a carefully tuned anti-rise magnitude, Sixfinity stands poised for the inevitable big hit that’s coming when you’re on the brakes.

Because we can keep anti-rise extremely consistent throughout the travel, we can strike the ideal bias toward traction or geometry preservation when braking. And just like with anti-squat, it lets us customize anti-rise for the use case of each bike.

Anti-Rise
%
69

At Sag

160E Bearings

Maximum sensitivity.
Superior bearing durability.

Floating collet axles, linkage pinch bolts and six-bar triangulation ensure perfect alignment and even force distribution for smooth suspension movement and long-lasting bearings. A must for riders who maintain their own whips and ride in foul weather conditions. It all adds up to one thing: Speed, baby!

Pick your progression

Sixfinity allows for a change to leverage-rate progression while geometry, anti-squat, and anti-rise remain constant. Whether across leverage-rate chips or wheel sizes, riders enjoy a consistent feel with minimal impact to travel between settings. 

Yeti’s ability to define the exact intended leverage rates with Sixfinity is a unique kinematic advantage. From supportive and efficient to plush and poppy, coil or air shock, each set of rates is specifically chosen for the bike's use case, providing the rider with the ability to tailor their ride dynamics. 

MTe - Four chip positions:
12%, 14%, 23% and 25%

160e - Three chip positions:
25%, 30% and 35%

A TRUE SIX-BAR DESIGN. Fractions of a millimeter difference in the linkage lengths and pivot placement impacts anti-squat and anti-rise characteristics. It’s incredibly complex. It took a half decade to refine the system. Unlike many other “six-bar designs” Sixfinity uses all six linkages to control the wheel path.