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Pronghorn APLS 'best of both worlds' mountain bike suspension


March 8, 2010

The Pronghorn mountain bike frame with APLS - the suspension unit is mounted on the top tu...

The Pronghorn mountain bike frame with APLS - the suspension unit is mounted on the top tube of the frame to help riders extract more energy from the chain

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Serious mountain bikers are always looking for a competitive edge. Often, that can mean extracting every ounce of energy from their bodies and their equipment. Danish high-end mountain bike builder Pronghorn has designed a bike frame the company calls its Anti-Power-Loss-System (APLS) where the rear shock absorber is mounted on the top tube. This, says the company, better utilizes the rider’s energy by delivering power more efficiently to the back wheel when the rider needs it – climbing uphill or negotiating technical courses.

By mounting the suspension on the top tube Pronghorn Racing offers a more horizontal and forward distribution of the energy while increasing the stiffness and rigidity of the rear end. The end result is a faster and more efficient suspension design while eliminating the energy-sapping pedal bob.

In other words, the bike handles like a hardtail when pedaling uphill so all the rider’s energy is conveyed via the chain to the rear wheel - the energy expelled while pedaling is not used to pull the wheel up and down. But when traveling downhill the bike reverts to handling like a full suspension model.

The APLS is now a feature of the company’s carbon fiber range of frames.

The frame was entered in the recent ISPO Brandnewaward competition where it was a finalist in the hardware section.


Que solucion tan ingeniosa y sencilla. Dicen que lo dificil es pensar lo simple.

Via Nirone

Facebook User
28th September, 2010 @ 07:37 am PDT

every mountain bike builder claims to have designed the perfect anti pedal bobs system... pedal bob comes about from the chain length growing when the shock is compressed.... unless this thing had a pivot point at close to the crank... I cant see how this would reduce pedal bob...a little more technical explanation is needed before I'm sold on the idea

companies like GT have an I-drive system that does an extremely good job of minimising pedal bob and I know it actually works..I ride a GT force 1.0

Damien Murray
4th April, 2013 @ 07:19 am PDT

Just have a shock lock-out like most bikes. That thing would suck balls in all mountain as the pivot arm would not give enough travel or allow the rider to lean back to increase head angle 'slackness'.

might appeal to the those with more dollars then sense!

Aaryn Johansen
17th June, 2014 @ 08:09 pm PDT
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