Sym-Hubs Have claimed to the best on the market. Unfortunately their high price has prevented many people from riding them. From the few people I have known who have ridden them, say they are super smooth and feel solid when they engage. They use a screw clutch system like normal free-coasters, however, they place the clutch underneath the driver and make it push into the hub shell.

There are three versions of the hub, all of which have:

• Sealed Bearing
• Skewer type axle
• Driver Clutch
• 48 hole drilling
• Perfect function Lifetime Guaranty
• 17 mm Internal steel axle

• 14 tooth only
• $321.10
• Unreleased weight

Nexus:

• $424.94 - $481.60
• 14 tooth only
• 26.6 - 30.6 ounces

Elite:

• 13 - 16 tooth
• $557.23 - $623.35
• Black or silver
• 26.6 - 30.6 ounces

Here is a compilation of pictures from their web site:

And here is their description of their “Isolator Drive System”

Here is a link to the Sym-hub founder around the birth of the company.