WHY IS OUR OSPW HOLLOWCAGE® SO SPECIAL?
*It is super silent (over 12dB noise reduction vs stock).
*The shifting is as good as with the original Dura Ace cage.
*It’s more aero than the OEM cage and other oversized cages.
*It saves more watts than other cages
*One of the lightest oversized cages on the market.
*First mono plate construction of its kind.

THE NEW ERA OF SILENT PULLEYS. MEET THE SILENT XRING PULLEY ™
Does it bother you when you ride in a really quiet scenery but you can still hear your bike’s chain engaging the pulleys? This familiar clunking noise has been accompanying us on every ride for decades. It’s time for a change.

Common polymer pulleys are fairly loud, this has always been a norm. Aluminium pulleys are even worse as the material radiates the sound more than any polymer, making them louder. We are introducing a completely new generation of pulleys, which are able to reduce the sound level by 12-14dB when compared to stock Dura Ace pulleys. This corresponds to roughly 60% of the noise reduction. Practically speaking, the cage becomes very silent.

We use a patent pending solution, our special xring rubber suspended bands, that dampen the chain impact on the guide pulley teeth, therefore eliminating the engagement noise, which is the single biggest contributor to overall drivetrain noise. From now on, your ride is going to be more silent than it used to be and you will hear sounds that you haven’t noticed before. It's the new era of derailleur cages