Upgrade your eBike's drive system with a star ratchet hub manufactured by Wren Sports. Designed to excel in high-torque situations with powerful mid-drive motor eBikes. Available in 32 hole and 36 hole variants and can be set up for 190mm or 197mm rear-ends.
A star ratchet hub is a robust and reliable hub design which distributes the load of your eBike's motor across 36 points-of-contact opposed to the 4-6 points-of-contact on a pawl based hub.
This addresses a common point of failure for many regular hubs where the pawls will break or strip the race in the hub causing the power to no longer be transferred to the rear wheel. The even distribution of power between the star ratchet teeth ensures a smooth and reliable drivetrain.
The star ratchet hub can be assembled and disassembled with no tools, resulting in easy access to bearings, freehub body replacements, and configuration between 190m and 197mm.
Specifications
Specifications
| Axle | 12mm Thru-Axle |
| Freehub | HG Style |
| Cassette Compatibility | 11 Speed |
| Width | 190mm/197mm |
| Spoke Count | 32/36 |
After 7800 miles my original hub finally stripped out from years of rough desert trails. I was excited to find out that Biktrix had a much superior rear hub for replacement. I ordered the hub, with new spokes and new rim, all put together by Biktrix for a great price. The new Ratchet hub sounds and performs great. Now I am back climbing mountain trails again.
If you need a 36 hole 197 hub, this or the $500 onyx hub are your only options. This hub with a 12x230 mm available on Amazon will adapt your super73 rx for a mid drive. My only criticism would be that it came packaged in a plastic bag with no documentation.
Blew out my original hub. Got the Wren star ratchet hub. Had a good bike shop install it with new spokes and a new tire set to boot. The mechanic commented on the quality of the hub and said I’ll probably never have another blow out. I was nervous about the fit but Biktrix had me send photos and measurements and everything fit fine.
Wren hubs are the way to go with powerful e-bikes.
I’m in my 5th year riding my Ultra. I have broken by stock hub by Oliver stressing it. The prawns can’t take my power and the 1,000 watt motors after a few hundred hard claims. So for peace of mind I bought the WREN. Now I think it’s in breakable. They have 20 teeth where the stick buns have 6 prawns. If you are a hill climber I think you should consider it.
