Designed For Derby - Improve your acceleration. Only 4g per bearing. Being small in size, the 167 bearing offers the highest acceleration of any bearing on the market. Exactly what you need in Derby. It is also the lightest bearing on the market which also helps with acceleration. The bearing has double shields to stop dirt getting in and the bearings fits 7mm axles. Upgrade your bearings to the new 167 bearing from Bont.
With an exceptionally fine polished surface finish on the bearing tracks and incredibly precise balls. The better the finish is on the bearing, the less resulting drag. In addition, light weight plastic cages also create lower resistance. The less energy spent making the bearing roll, the more energy converted into speed.
Under load and at speed, bearings warp. Cheaper bearings tend to be made from soft steel which tend to warp a lot. This warping slows the bearings down. Bont Jesa bearings are made from high grade hardened steel which work to keep the bearing as round as possible. This means that the Bont Jesa bearing don't slow down as much from warping as most bearings do.
Most bearings are quickly polished in one direction to remove any metal fragments left behind in the manufacturing process. Bont Jesa bearings are finely polished in both directions to ensure the balls roll with the least amount of friction possible.
Jesa increased the radial clearance providing slightly less ‘total contract ball patches’, which reduces drag. The bearings are made with 'Swiss Precision'. Each bearing is individually tested to make sure it performs at Jesa's high standards.