Enduro MR2437 LLB Bearing
The Enduro MR2437 LLB is a sealed radial cartridge bearing designed for bicycle bottom brackets, especially those using 24 mm Shimano-style crank spindles. It’s built for smooth rotation, long service life, and strong resistance to contamination in harsh riding conditions.
Key Specifications
- Bearing size: 24 Ă— 37 Ă— 7 mm
- 24 mm inner diameter
- 37 mm outer diameter
- 7 mm width
- Type: Sealed radial cartridge bearing
- Ball material: Precision chromium steel
Seal Design
- LLB double-lip seals
- Labyrinth-style contact design
- Low-friction sealing for smooth crank rotation
- Strong protection against water, dust, and grit
Intended Use
Commonly used in:
- MTB and road bottom brackets
- Systems with 24 mm Shimano-style crank spindles
- BB30 / PF30 / threaded conversion setups (depending on adapter design)
Performance Characteristics
- Low rolling resistance for efficient pedalling
- High resistance to contamination in wet or dusty conditions
- Designed for long service intervals under MTB load
- Balanced durability and smoothness for daily riding or racing
Why It’s Popular
This bearing is often chosen as an upgrade or replacement because it:
- Extends bottom bracket lifespan in muddy or wet conditions
- Maintains smoother crank feel over time compared to basic OEM bearings
- Handles real-world MTB loads better due to improved sealing and materials
