SAN-O bearings are specially designed as "pivot bearings".
These babies feature polished chrome balls, 10.3 mm nylon cages and the best synthetic bearing grease from Japan. They're not considered "speed bearings", but they'll still get you going pretty fast. It may be a little counterintuitive, but we've found this setup to be far superior when it comes to making sweeping, twisty turns... smooth and quiet.
Why 10.3 mm SPACERS and not built-in SPACERS?
Hamboards have used built in bearings since 2006.... They suspect that with repeated large and heavy turns, like a Hamboard, the built-in spacer bearings are so precisely matched that they tend to exert heavy lateral loads on the bearing components and alternatively push the bottom brackets out, eventually loosening both bearings from their tight fit in the wheel hubs. This makes sense, because when a system is under load, it bends. It's hard to see with the naked eye, but it happens. The repeated, alternating deflection leads to wear and fatigue. This fatigue eventually leads to bearing vibration (noise) and friction (drag). Built-in spacer bearings are great for many applications... especially for straight-line running... but maybe not so great for big, heavy turning like on a hamboard or cruiser.
The SAN-O bearings 10.3mm spacers give extra tolerance gap to handle the huge side load deflections without wearing the bearings as much and without pushing the bottom bracket out as much... We believe that the result is that SAN-O bearings rotate better and stay locked in the plastic wheel hubs better than built-in bearings.
WHY SYNTHETIC LUBRICANT and not OIL?
Grease bearings are not nearly as widely available as "Speed Bearings". It's no secret that bearing manufacturers think that consumers assume that "more speed" is always "more better". That's definitely true if you're going straight, but not necessarily for a hamboard that's screaming to turn.
Grease is thicker and more viscous than oil, which sounds like "drag". Engineers know that grease (and not oil) is a better lubricant for low and medium speeds. (Your car engine spinning tens of thousands of times per minute contains oil, while the entire drivetrain spinning hundreds of times per minute contains grease). There are all kinds of bearing grease, but specially formulated synthetic bearing grease is far superior to oil-based grease due to its very narrow molecular weight distribution (polymer physics mumbo jumbo). We have found the winner among bearing greases, specifically formulated for ball bearings. When this grease warms up just a little, it provides a buttery smooth glide that really lasts.
Bearings are not that expensive, so we should use our brains and build the best for Hamboards. And these are the SAN-O bearings... the very best. We hope you like them!
Oh... and why SAN-O?
Anyone who's learned to surf in Southern California knows these favorite spots and the irony of surfing the warm whitewater of a nuclear power plant located right on the beach.
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If you get this item offered cheaper, you will receive the same price from us, as well as a shopping voucher for 20 euros for your subsequent purchase.
