Anti-Rise — Braking Stability
K-Volve Kinematics / Anti-Rise
K-Volve / Metric 03
Anti-Rise
Approximately 100% at sag. Under braking, the chassis stays level — the rear doesn't extend, the front doesn't dive. A ~50 percentage point advantage over most enduro bikes.
~100%
At Sag
Chassis-neutral under braking
49.7%
Peak Value
Near sag — declining smoothly
38.8%
At Bottom
Smooth monotonic decline
~50pt
Lead
vs. typical enduro bikes
On my old bike, grabbing a handful of brake on a steep chute would pitch me forward. The Paratu just stays level. I can brake later, harder, and the bike doesn't move underneath me. It's transformed my steep riding.
— Fil Palmer, DIRTLAB Test Rider
Braking Stability Explained
Anti-rise measures how the rear suspension responds to braking forces. At 100%, the rear end stays perfectly neutral under braking — no extension, no compression, no attitude change. The chassis stays level, the rider stays centred, and weight transfer happens through the tyres rather than through suspension geometry changes.
The Paratu CP achieves approximately 100% anti-rise at sag, with a smooth monotonic decline through travel. The curve peaks at 49.7% near sag and declines to 38.8% at full compression. This declining profile means the bike is most stable exactly where stability matters most — in the normal riding position under hard braking.
Why This Matters on Trail
Steep Technical Descents
On a typical enduro bike with 50% AR, braking causes the rear to extend by 15–25mm. The front compresses, the rear rises, and the rider's weight shifts forward uncontrollably. At ~100% AR, the Paratu CP eliminates this weight transfer, keeping the rear contact patch loaded through the steepest chutes.
Braked Corners
Corner entry under braking is where most enduro time is lost or gained. Low AR bikes change their geometry as the rider brakes into a corner — the front dives, the head angle steepens, and the wheelbase shortens. The Paratu CP maintains its geometry through the braking phase, giving the rider a stable, predictable platform for corner entry.
The Physics of Forward Axle Path + High Anti-Rise
Complementary Design
The Paratu CP has a forward axle path, which creates a small harshness penalty on square-edge hits compared to rearward-path designs. The ~100% anti-rise compensates directly: while the axle path adds a forward force component on big impacts, the high AR keeps the chassis settled when the rear is being driven hard into obstacles. The net result is a bike that absorbs terrain differently from a high-pivot design but arrives at the same outcome — a stable, planted rear end.
Competitor Comparison
Frequently Asked Questions
What does ~100% anti-rise mean?
Under heavy braking, the rear suspension neither extends nor compresses — the chassis attitude stays neutral. The front doesn't dive extra, the rear doesn't jack up. Weight transfer happens through the tyres, not through suspension geometry changes. This gives the rider a stable, predictable platform through braked corners and steep chutes.
How does anti-rise help on steep descents?
On a bike with 50–60% anti-rise, braking causes the rear to extend and the front to dive. The rider's weight shifts forward uncontrollably, reducing rear traction. At ~100% AR, the Paratu CP maintains rear contact patch and chassis stability regardless of braking force. The rider controls weight distribution through body position, not geometry.
Why don't all bikes have high anti-rise?
Anti-rise is determined by the relationship between the instant centre, the rear axle, and the front contact patch under braking forces. Achieving high AR requires specific pivot placement that can conflict with other kinematic goals. Most dual-link VPP and Horst-link designs compromise AR to achieve their LR or axle-path targets. The Paratu CP's concentric pivot architecture achieves high AR without compromising other metrics.
How does the Paratu CP compare on anti-rise?
The Paratu CP leads the segment at ~100% anti-rise. The closest competitor is the Orbea Rallon (~75%). Most mainstream enduro bikes sit at 50–60%. This is a ~50 percentage point advantage over bikes like the Canyon Strive:ON (~52%) and Santa Cruz Bullit (~50%).
K-Volve Kinematic Analysis
Fil Palmer, Bike Italia / MTBtech — Independent ASP kinematic validation
