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.  

Jonty Williamson Sixfinity

THE HELL YES OF SIXFINITY. 

Built around the World Cup-winning suspension, 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. 

Mastering Six Bar

MASTERING
THE SIX BAR. 

 All six bars control the wheel path and drive the shock for independent custom-tuned control of acceleration and deceleration – tuned for every frame size.  

Kinematics 
Sixfinity can achieve maximum control across three key kinematic metrics: Acceleration Response (Anti-Squat), Deceleration Response (Anti-Rise), and Leverage Rate. Tunability is nearly infinite, making Sixfinity highly versatile, and allowing us to tune the desired kinematics independently. 

Structure 
With Sixfinity, the loads are optimally distributed, resulting in increased structural triangulation and durability through the travel range. The Sixfinity design enables deliberate, optimal bearing selection and is not constrained by packaging, ensuring the correct bearing is used at each pivot.   

Scaling 
In addition to the increased kinematic control, Sixfinity enables optimized kinematics for geometric scaling.  Each frame size is treated as a unique design, with like parts carefully repositioned to achieve the desired kinematics and geometry, and kinematic hardpoints uniquely optimized for each size. 

SQUAT % ANTI LT ANTI-SQUAT (30T) 0 40 80 120 160 VERTICAL WHEEL TRAVEL [mm] 0 100 100 200 INFLECTION POINT SAG PEDALING ZONE 191% 30-10 118% 30-52
SQUAT % ANTI VERTICAL WHEEL TRAVEL [mm] 0 40 80 120 160 LT ANTI-SQUAT (30T) 0 100 100 200 INFLECTION POINT SAG PEDALING ZONE 191% 30-10 118% 30-52

Unique bikes.
Unique leverage curves.

Acceleration Response.

Anti-squat can be tuned precisely at sag to better balance “pedal anywhere” efficiency with descending performance.

With Sixfinity, we maintain the same dual-behavior anti-squat strategy as we deliver with Switch Infinity, but with even greater control. Sixfinity allows additional anti-squat tuning based on power input, travel and ride intent.

Sixfinity Anti-squat magnitudes scale inversely with power assist. The unassisted (power limited) LT anti-squat magnitude is greater than their assisted (traction limited) LTe counterpart. This results in the best balance of efficiency and traction for drastically different systems.

Sixfinity provides a greater fidelity in controlling both the shape and magnitude of the anti-squat curves, while allowing a wide range of anti-rise and leverage outputs, all while balancing efficiency and traction for the exact desired kinematic blend.

Anti-Squat
%
73

Change across entire cassette range at sag

Anti-Squat
%
118

At Sag

LT ANTI-RISE VERTICAL WHEEL TRAVEL [mm] 0 40 80 120 160 ANTI-RISE % 20 60 40 80 100 SAG INFLECTION POINT 72% 76% 67%
LT ANTI-RISE VERTICAL WHEEL TRAVEL [mm] 0 40 80 120 160 ANTI-RISE % 20 60 40 80 100 SAG INFLECTION POINT 72% 76% 67%

Deceleration Response.

Sixfinity can be tuned for desired traction while balancing geometry preservation while braking, a key to a well-tuned deceleration response.

The magnitude of the LT anti-rise curve is slightly lower than its SB160 predecessor, striking an ideal balance between traction and geometry preservation when braking.

With carefully tuned anti-rise magnitudes that remain consistent throughout the travel, Sixfinity can stand poised for the inevitable big hit that’s coming when you’re on the brakes - Providing predictable performance in all braking scenarios.

It’s this trait – combined with the switching behavior of the acceleration response that puts Sixfinity in a performance class all its own.

Anti-Rise
%
76

At Sag

MTe
LTe
SQUAT % ANTI MTe ANTI-SQUAT (32T) 0 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] 0 30 60 90 120 145 MTe ANTI-SQUAT (32T) 0 100 50 50 100 150 INFLECTION POINT SAG PEDALING ZONE 32-10 132% 34-52 105%

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

Balanced geometry & traction.
Composed under pressure.

Sixfinity can be tuned for desired traction while balancing geometry preservation while braking, a key to a well-tuned deceleration response.   

The magnitude of the LT anti-rise curve is slightly lower than its SB160 predecessor, striking an ideal balance between traction and geometry preservation when braking. 

With carefully tuned anti-rise magnitudes that remain consistent throughout the travel, Sixfinity can stand poised for the inevitable big hit that’s coming when you’re on the brakes - Providing predictable performance in all braking scenarios. 

It’s this trait – combined with the switching behavior of the acceleration response that puts Sixfinity in a performance class all its own. 

Anti-Rise
%
69

At Sag

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%

LTe - Three chip positions:
25%, 30% and 35%

LT - Three chip positions:
15%, 25% and 30%

160E Bearings

PERFECT ALIGNMENT. 

All Sixfinity equipped bikes carry forward our World Cup winning, precision-machined linkage. Designed for perfect shock alignment, it uses floating collet axles and a self-aligning rocker link to further smooth the action, adding to that unreal Sixfinity feel on the trail. Plus, it uses standard sized cartridge bearings to make service no big deal. Sixfinity provides better alignment for improved bearing life and less service for the rider. 

Battle tested on the World Cup, Sixfinity has proven to deliver world class reliability. It all adds up to one thing: Speed, baby! 

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 NEARLY DECADE TO REFINE. UNLIKE MANY OTHER “SIX-BAR DESIGNS” SIXFINITY USES ALL SIX LINKAGES TO CONTROL THE WHEEL PATH. SIXFINITY: MASTER OF THE SIX-BAR.