Wren Star Ratchet Rear Hub (190mm/197mm)

Sale price CA$435.00
Shipping: Leaves within 6-7 business days
Sale price CA$435.00
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14 Days Return
Custom Built


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.

This bundle includes the hub, adaptor to fit your hub spacing and axle type (if applicable) and 40 Uncut 14G Spokes and Spoke Nipples.

What is a star ratchet hub?

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.

No Tool Construction

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.

Technical Specifications

Axles Supported

12mm Thru Axle (5mm QR if purchased with Adaptor)

Spokes Included

40 Uncut, 14G Spokes and Nipples Included


HG Style

Cassette Compatibility

9, 10, 11 Speed


Adjustable Between 190mm, 197mm

Spoke Hole Count



Bike Name 36 Hole 36 Hole with 5mm QR Adaptor
Juggernaut Ultra FS
Juggernaut Ultra 1000 w/Rear Thru Axle
Juggernaut Ultra Duo 2 Step-Over
Juggernaut Ultra FS Pro 2/3
Juggernaut Ultra FS Pro 1 26x4 Fat-Tire Version
Juggernaut Ultra Beast 1/2
Monte Capro Ultra 1/2 26x4.8 Fat-Tire Version
Juggernaut Ultra Duo 3/4 with QR Adaptor
Juggernaut Ultra FS Pro 1 27.5x3 Boost Version
Monte Capro Ultra 1/2 27.5x3 Boost Version

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Customer Reviews

Based on 16 reviews
Martin Robinowich

So far the Wren Ratcheting freehub seems rock solid. If I had known the standard freehub would fail, I would’ve ordered it as an upgrade when I ordered my Jugg Ultra Duo.

Allen Hardy
biktrix supplied WREN hub

The package came quick AFTER they dropped the ball not seeing my order was placed AND paid . The hub looks good except for a small nick in the flange where the spokes install. Time will tell on the operational experience ; it sounds smooth as silk.

Todd Cuthbert
Great rear hub

Received my new rear hub and first thing I noticed was it appeared to be a far superior hub than the original rear hub that comes on the bike. Installs was a bit challenging as there were a couple extra parts (I come to realize they were different size spacers) and no directions as to what they were for. But after figuring it out and changing to the proper spacer it went together easily. Been back riding for over a week now and definitely rides smother and fixed my grinding issue from the bad hub I had. Thanks to the team for getting the part out to me quickly, so I had minimal down time.

Thomas Marsh
Wren Star Ratchet rear hub

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.

Norvard McGee
Props to biktrix for having this

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.