Short Description
The Enduro Bearings MR 18307 LLB ABEC 3 bearing is a high-quality radial cartridge bearing designed for reliable performance in hubs, bottom brackets and selected pivot applications. With dual-lip LLB seals, deep-groove races and waterproof grease, it offers smooth rotation and strong protection against everyday riding conditions.

Key Features

• ABEC 3 Precision: Designed to deliver dependable smoothness and durability for cycling applications
• LLB Dual-Lip Seals: Light-contact labyrinth seals help keep water, dirt and contaminants out
• Deep-Groove Race Design: Allows larger balls for improved strength, load capacity and bearing life
• Waterproof Grease Fill: 90% fill with high-pressure waterproof grease for protection in wet conditions
• Versatile Use: Suitable for hubs, some older square taper bottom brackets and selected pivot applications

Product Overview
The Enduro Bearings MR 18307 LLB ABEC 3 bearing is built for riders and mechanics who need a durable replacement cartridge bearing for demanding bike use. Featuring Grade 10 balls, deep-groove races and light-contact dual-lip LLB seals, it is engineered to provide smooth performance while protecting against moisture, dirt and daily wear. This bearing is commonly used as a hub bearing and may also suit some older square taper bottom brackets or pivot locations, depending on compatibility. With an 18 mm internal diameter, 30 mm external diameter and 7 mm width, it can also replace certain bearings marked 6903 where the correct internal diameter is required.

Specifications

• Brand: Enduro Bearings
• Model: MR 18307 LLB
• Product Type: Radial cartridge bearing
• ABEC Rating: ABEC 3
• Seal Type: LLB dual-lip labyrinth seals
• Clearance: C3
• Dimensions: 18 mm x 30 mm x 7 mm
• Bearing Balls: Grade 10
• Grease Fill: 90% high-pressure waterproof grease
• Static Load Rating: 576 lbf / 2.56 kN
• Weight: 15.1 g
• Use: Hubs, selected bottom brackets and compatible pivot applications

Ideal For

• Replacing worn hub bearings
• Bike servicing and workshop repairs
• Selected older square taper bottom bracket applications
• Riders needing reliable sealed bearing performance

What’s Included

• 1 × Enduro Bearings MR 18307 LLB ABEC 3 bearing

Care & Notes
Check the required bearing size before ordering. Although this bearing may replace some bearings marked 6903, its internal diameter is 18 mm, which is 1 mm larger than a standard 6903 bearing. For suspension pivot use, confirm compatibility, as MAX-type bearings may be better suited for high-load suspension applications.

Why Buy From LK Bikes
LK Bikes offers dependable cycling components from trusted brands, supported by expert advice, reliable service and strong aftersales support.