Surly Hurdy Gurdy Chain Tensioner 9/10mm Axles Stainless Steel Black

Surly Hurdy Gurdy Chain Tensioner

9/10mm Axles | Stainless Steel | Black | Sold Individually

The Surly Hurdy Gurdy Chain Tensioner is a simple, durable solution for preventing rear wheel slippage on bikes with semi-horizontal, forward-facing dropouts. Precision-cut from stainless steel, it helps maintain consistent chain tension and secure wheel alignment during hard pedaling, single-speed conversions, fixed-gear riding, or loaded touring.

Designed to fit quick-release skewers, bolted axles, and nutted axles up to 10mm, the Hurdy Gurdy offers dependable performance with flexible wheel adjustment for a wide range of drivetrain setups.

Prevents Rear Wheel Slippage

The Hurdy Gurdy helps keep your rear wheel securely positioned under heavy pedaling loads.

Benefits include:

• Maintains consistent chain tension
• Prevents axle movement in the dropout
• Helps preserve wheel alignment
• Improves drivetrain reliability

Ideal for bikes with semi-horizontal or forward-facing dropouts.

Durable Stainless Steel Construction

Built from high-quality stainless steel, the Hurdy Gurdy is made to withstand years of riding in all weather conditions.

Advantages include:

• Corrosion-resistant construction
• High strength and durability
• Long service life
• Minimal maintenance

Adjustable Wheel Position

The dual-hole design provides greater flexibility when setting chain tension.

Features include:

• Two axle mounting positions
• Wide fore/aft wheel adjustment range
• Easier drivetrain setup
• Fine-tune chain tension with confidence

Broad Axle Compatibility

Compatible with a variety of rear axle systems, making it a versatile choice for many bikes.

Fits:

• Standard quick-release skewers
• Bolted axles
• Nutted axles up to 10mm

Includes a QR adapter washer for quick-release applications.

Specifications

• Brand: Surly
• Model: Hurdy Gurdy Chain Tensioner
• MPN: 04-002685
• Material: Stainless Steel
• Color: Black
• Axle Compatibility: 9mm & 10mm
• Compatible Axle Types: Quick Release, Bolted, and Nutted Axles
• Dropout Compatibility: Semi-Horizontal & Forward-Facing Dropouts
• QR Adapter Washer Included: Yes
• Sold As: Individual

Compatibility

Compatible with bicycles featuring:

• Semi-horizontal dropouts
• Forward-facing horizontal dropouts
• Single-speed conversions
• Fixed-gear bikes
• Touring and commuter bikes
• Surly Cross-Check and other compatible Surly frames

Not intended for vertical dropout frames.

In the Box

• Surly Hurdy Gurdy Chain Tensioner
• QR Adapter Washer

Key Features

✔ Genuine Surly chain tensioner

✔ Durable stainless steel construction

✔ Prevents rear wheel slippage

✔ Dual mounting holes for easy chain adjustment

✔ Fits 9mm and 10mm axle systems

✔ Compatible with QR, bolted, and nutted axles

✔ QR adapter washer included

✔ Sold individually

Ideal For

✔ Single-speed bikes

✔ Fixed-gear bikes

✔ Gravel bikes

✔ Cyclocross bikes

✔ Touring bikes

✔ Surly Cross-Check owners

✔ Riders using horizontal dropouts

Why Choose the Surly Hurdy Gurdy?

• Keeps the rear wheel securely positioned under load
• Stainless steel construction provides years of dependable performance
• Dual adjustment positions simplify chain tension setup
• Compatible with multiple axle types, including QR and 10mm nutted axles
• Perfect for single-speed, fixed-gear, and touring applications
• Genuine Surly component trusted by commuters, adventure riders, and mechanics worldwide

The Surly Hurdy Gurdy Chain Tensioner is a rugged, precision-made solution for maintaining proper chain tension and preventing rear wheel movement on bikes with horizontal dropouts. Its stainless steel construction, versatile axle compatibility, and simple installation make it an essential upgrade for single-speed, fixed-gear, and touring bicycles.