Full suspension when traveling downhill
Direct drive when pedaling uphill
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
The APLS suspension unit
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 - while performing like a full suspension model on the downslope.
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