RISK Parts Bicycle Chain Keeper Mountain/Road Virtual Flywheel Chain Cleaner Chain Lubricator Tool RL210 RL211

he RISK RL210 / RL211 Dummy Hub Chain Keeper is a practical bicycle maintenance tool designed for chain cleaning, chain lubrication, bike transport, and rear wheel removal service. It replaces the rear wheel during maintenance, keeping the chain supported and tensioned so the drivetrain can rotate smoothly while cleaning or applying lubricant.

The RL210 thru-axle version is designed for bicycles with 12 mm thru-axle frames. It is lightweight, compact, and includes 2 chain oiling sponge rings, allowing it to be used as a simple chain oiler during drivetrain maintenance.

The RL211 quick-release version features a sliding rod and dummy pulley design. It is compatible with both quick-release frames and 12 mm thru-axle frames, making it more versatile for different bikes. The RL211 also includes 2 oiling sponge rings and a disc brake piston block, helping prevent accidental brake lever pressing during cleaning or transport.

A separate 20-piece chain oiling sponge ring refill pack is also available for users who need extra consumable sponge rings.

Note: This product includes the selected tool set only. Bicycle, chain, derailleur, cassette, quick-release skewer, thru-axle, brake caliper, oil, storage hook-and-loop strap, and other accessories shown in images are for demonstration only unless listed in the package contents.

Key Features

• Works as a dummy hub / chain keeper after rear wheel removal
• Helps keep the chain supported during cleaning and lubrication
• Can assist with bike transport and drivetrain protection
• Compatible options for 12 mm thru-axle and quick-release frames
• Sponge rings allow controlled chain oil application
• RL211 quick-release version includes sliding rod for smooth side-to-side chain movement
• RL211 includes disc brake piston block to help avoid accidental brake piston closure
• Built-in magnetic storage function for attaching to metal tool boards or holding small steel screws
• RL210 also works as a simple emergency rolling ruler with 15 cm scale reference
• Suitable for road bikes, mountain bikes, gravel bikes, folding bikes, and workshop maintenance

Product Specifications

Version Comparison

 Product Options

1. RL210 Thru-Axle Version + 2 Oiling Sponge Rings

Model: RL210
Compatibility: 12 mm thru-axle bicycle frames only
Included: RL210 dummy hub + 2 chain oiling sponge rings
Package Weight: Approx. 23.5 g
Recommended Use: For riders using 12 mm thru-axle road, MTB, or gravel bikes.

2. RL211 Quick-Release Version + Piston Block + 2 Oiling Sponge Rings

Model: RL211
Compatibility: Quick-release frames and 12 mm thru-axle frames
Included: RL211 dummy pulley tool + sliding rod + disc brake piston block + 2 chain oiling sponge rings
Package Weight: Approx. 71.6 g
Recommended Use: More versatile option for bike shops, home mechanics, and users with multiple bike types.

3. Chain Oiling Sponge Rings / 20 pcs

Quantity: 20 pcs / bag
Use: Replacement sponge rings for chain lubrication.
Recommended Use: Consumable refill pack for frequent chain maintenance.

Chain Cleaning Helper

Keeps the chain in place when the rear wheel is removed, allowing smoother drivetrain rotation for cleaning and maintenance.

Chain Oiler Function

Use with the included sponge rings to apply lubricant evenly to the chain during rotation.

Transport Support

Works as a dummy hub to help support the chain and reduce drivetrain movement when transporting a bike without the rear wheel.

RL211 Wide Compatibility

The RL211 quick-release version is compatible with both quick-release and 12 mm thru-axle frames, making it suitable for more bikes.

Disc Brake Protection

RL211 includes a piston block to help prevent accidental brake lever pressing when the rear wheel is removed.

Magnetic Storage

Built-in magnets allow the tool to attach to iron tool boards or collect small steel screws during maintenance.

How to Use for Chain Cleaning

1. Remove the rear wheel from the bike.
2. Install the dummy hub / chain keeper in the rear dropout area.
3. Place the chain onto the dummy pulley or guide groove.
4. Rotate the crank slowly to clean the chain.
5. For RL211, the sliding rod allows smoother left-right chain movement during shifting simulation.

How to Use for Chain Lubrication

1. Install the included oiling sponge ring onto the tool.
2. Apply a small amount of chain lubricant to the sponge ring.
3. Rotate the crank slowly so the chain passes across the lubricated sponge.
4. Wipe off excess lubricant after application.

Sponge rings are consumable parts. For frequent maintenance, it is recommended to purchase extra refill rings.

Important Notes

• RL210 is only suitable for 12 mm thru-axle frames.
• RL211 is compatible with quick-release and 12 mm thru-axle frames.
• The included piston block may not fit every hydraulic disc brake caliper due to different brake designs. If incompatible, please use the original brake manufacturer’s piston block.
• The shape of the included piston block may vary slightly between production batches.
• The center foam piece in the sponge ring is for transport protection. Please remove it before use.
• Storage hook-and-loop strap shown in images is not included.