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

Sale price CA$435.00
Sale price CA$435.00
Shipping: Leaves within 6-7 business days


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/Pro/4
Juggernaut HD Duo
Juggernaut Ultra FS Pro 1 27.5x3 Boost Version
Juggernaut Classic Duo
Monte Capro Ultra 1/2 27.5x3 Boost Version

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Customer Reviews

Based on 20 reviews
leonard Cervo
Ultra duo 3

no discount given at all even though I only had the bike 6 months. Plus the spokes have to all be changed, hard time finding spokes that fit.

B sting
Wren star ratchet rear hub juggernaut FS PRO

Get one when you order your bike, the 1,000 Watt motor will wear out the original one in about 600 miles or so, and this may depend on the type of riding you do. I ride off road up and down mountains. They got me a new hub and wheel in about a week. Thanks bike people for getting the parts that I need to the USA, asap. 😊✌️🤙

Joey Elsey
Decent Hub

The hub is built well but the spokes and nipples that are supplied don’t work with the wheel they sent on the bike. Spokes were also wrong diameter and the nipples didn’t match the spokes. Every time I order from biktrix I have issues. I wouldn’t have ordered from them if it wasn’t for there odd spoked wheel. I would not recommend biktrix but the wren hub is built well.

Michael Neal
Hub is great after I got all the parts.

I got my wheel with the new hub in a very short time and I was very happy about that. Works great, sounds good. My issue was I didn't receive the QR skewer to mount it. Roshan says any wheelset you buy will not come with skewers Customer Service says they should have sent one and just forgot. However they did send me one, took about 5 days to get it, that was partially on FedX.
If you get one of these hubs specify if you need a skewer. My bike was originally a bolt on so I never had one. Other than that I like the upgraded wheel and as always love my bike, it's been a good one.

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.