How do I proceed if I want my fork upgraded or my BOS fork/shock serviced?
To check out how easy it is to send us your BOS and see what happens to it, check our
service FAQs for all the details.
Why isn't it an upside down fork?
(Text by BOS) Many people were expecting an upside-down fork from BOS because of Nicolas Vouilloz’s factory V Process fork. To be honest, we did give it a lot of thought. If marketing was the main priority, we would have gone for upside-down, no question ... but what we wanted most of all was to produce a fork that was right for today’s downhill, and was affordable for amateur riders.
The BOS upside-down forks exists … but only on paper. To produce it meant some compromises which would be too inconvenient for the user. In order to achieve the stiffness we wanted, it would have needed a special hub with all the implications for riders (special wheels, incompatibility with current standards, extra cost). In the end, an upside-down fork would have been too expensive and we didn’t want to ruin our entry to the downhill fork market. On the plus side, the conventional fork allowed us to keep within industry standards, as well as producing great performance at a reasonable price.
Why is it pressurised?
(Text by BOS) In motorcycles, the top-performing forks are all pressurised, mainly in motocross (internal reservoirs), but also in Moto GP where the reservoirs are clearly visible. We produced a kit for Moto GP forks three years ago which pressurised conventional forks with very good results. The key advantage of a pressurised fork is that it works like a rear shock. In brief, the hydraulics are both more constant and more reactive. Also, the damping can be separated from the lubrication (all governed by the same hydraulic oil in most conventional forks). Idylle Pro uses two different types of oil: one for lubrication, ie. the smooth operation of the fork, and the other for damping. So, we not only use the same compression adjustment as the Stoy, we also use the same oil in the damping circuit. It’s easy to see how duplicating the same systems give benefits all round.