TOOPRE Bike Chain Fixer Virtual Flywheel Tensioner for Mountain & Road Bikes Thru-Axle & Quick-Release Universal

Keep your drivetrain secure during transport, cleaning, or rear wheel maintenance with the TOOPRE TL-237 Bike Chain Keeper. Designed to simulate the normal working position of the rear wheel, this chain holder helps fix the rear derailleur and chain in place when the rear wheel is removed.

The TL-237 is compatible with both 12 mm thru axle and quick release systems, making it suitable for a wide range of mountain bikes and road bikes. Its adjustable design supports multiple rear hub widths, including 130 mm, 135 mm, 142 mm, 148 mm, and 157 mm.

Made from high-strength aluminum alloy and POM, it features CNC precision machining, smooth chamfered edges, and an anodized finish for durability and a premium appearance. The H-shaped chain groove design helps keep the chain stable and reduces the risk of chain drop during shifting or maintenance.

Key Features

• Holds the chain and rear derailleur in place when the rear wheel is removed
• Ideal for bike transport, cleaning, maintenance, and rear wheel repair
• Works as a dummy hub / virtual cassette / chain tensioner
• Compatible with 12 mm thru axle and quick release systems
• Adjustable length for multiple hub spacing: 130 / 135 / 142 / 148 / 157 mm
• High-strength aluminum alloy body with POM pulley
• CNC-machined construction with smooth rounded edges
• Anodized finish for improved durability and corrosion resistance
• H-shaped chain groove design helps prevent chain drop
• Lightweight, compact, and easy to install

Specifications

• Brand: TOOPRE
• Model: TL-237
• Product Name: Bike Chain Keeper / Dummy Hub Chain Tensioner
• Material: Aluminum Alloy + POM
• Color: Black
• Compatibility: Thru Axle & Quick Release
• Applicable Hub Widths: 130 / 135 / 142 / 148 / 157 mm
• Thru Axle Mode Length: Adjustable from approx. 122 mm to 157 mm
• Quick Release Mode Length: Adjustable from approx. 127.5 mm
• Product Size: 135 × 48 × 48 mm
• Package Size: 155 × 60 × 55 mm
• Weight: Approx. 116 g per set
• Packaging: Boxed

Package Includes

• 1 × TOOPRE TL-237 Chain Keeper Set

Carton Information

• Carton Size: 52 × 40 × 23 cm
• Quantity: 60 sets/carton
• Gross Weight: Approx. 8 kg/carton

Usage Scenarios

• Rear wheel removal
• Bicycle transportation
• Chain cleaning and maintenance
• Rear derailleur adjustment
• Workshop repair and storage
• Preventing chain slack or chain drop when the wheel is removed