The Wren inverted suspension fork is a high-performance shock absorber for fat tires eBikes. The lightweight components of this top-of-the-line fork allow for a quick reaction to uneven terrain and trails. With up to 110mm of travel, true lockout, and adjustable rebound and compression, users can fine-tune the fork for the configuration they desire.

Technical Specifications




2151 g / 4.7 lbs

Steerer Tube

1-1/2 1-1/8 Tapered, 260mm/10 inches long

Hub Spacing



15mm 150mm Thru Axle w/ Dual M8 Boltbeads

Brake Mount

POST Mount

Compatible Tire Sizes

27.5x3, 26x4 - 26x4.8


Bike Name Compatible
Juggernaut Ultra Duo 2
Juggernaut Ultra Duo 3
Juggernaut Ultra FS
Juggernaut Ultra FS Pro 1/2
Juggernaut Ultra 1000 (some models)
Juggernaut Ultra Beast 1/2
Monte Capro Ultra (Fat tire)
Monte Capro Ultra (Boost wheelset)
Monte Capro Lite

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Customer Reviews

Based on 2 reviews
John Murphy
The Wren Fork

I’m very happy with this inverted fork that Biktrix installed on my Ultra XD. Once you pump up the upper chamber you can tell the sag from sitting on it. Then add about 10 pounds to the bottom section or what feels right. It has a rebound wheel on the right side that’s very accessible. It’s seems infinitely adjustable to the rider and terrain. I’m still learning but already I know it’s for me. It’s pricey but very well built and management is very responsible with questions.

Dennis Sulgrove

Yes! Thanks! Nice addition to bike. My first front suspension bike so it feels stable and cushions like I was hoping!