Enduro MR 15307 LLU/LLB Radial Cartridge Bearing - ABEC-5

Enduro MR 15307 LLU/LLB Radial Cartridge Bearing - ABEC-5 Enduro

Enduro MR 15307 LLU/LLB Radial Cartridge Bearing - ABEC-5

Enduro MR 15307 LLU/LLB Radial Cartridge Bearing - ABEC-5

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What Makes the Enduro MR 15307 ABEC-5 Bearing So Precise?

The Enduro MR 15307 is a high-precision radial cartridge bearing built to ABEC-5 tolerance standards, delivering tighter dimensional accuracy and smoother rotation than ABEC-3 bearings of the same size. High-precision chromium steel balls provide smooth, durable rolling performance in demanding cycling applications. The dual-seal design pairs an LLU seal on the outward-facing side for maximum contamination protection with a lighter-contact LLB seal inward to retain grease and minimize drag from the inside out.

At 15mm x 30mm x 7mm, the MR 15307 covers a non-standard bearing size found in specific hub, crank, and suspension linkage applications where common 6xxx series bearings won't fit. ABEC-5 precision makes it an appropriate choice for components where dimensional accuracy directly affects performance and feel over time. For mechanics who need an exact dimensional match with a quality pedigree, the MR 15307 is the bearing to reach for.

$13.75
$13.75
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10 in stock

  • Orders over $100 ship free!
  • Estimated delivery: Jun 08 - Jun 12

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Specifications

  • Bearing Number: MR 15307
  • Inner Diameter: 15mm
  • Outer Diameter: 30mm
  • Width: 7mm
  • Tolerance: ABEC-5
  • Seal Configuration: LLU (outward) + LLB (inward)
  • Ball Material: High-precision chromium steel
  • Application: Hubs, cranks, suspension linkages

FAQ

What is the difference between ABEC-3 and ABEC-5 precision?

ABEC-5 has tighter tolerances for bore, outer diameter, and runout than ABEC-3. The result is a bearing that spins more smoothly and fits more precisely in the housing. For high-speed or precision applications, the upgrade from ABEC-3 to ABEC-5 is meaningful.

Why does the MR 15307 use both LLU and LLB seals?

The LLU seal on the outward side blocks contamination from entering the bearing. The lighter-contact LLB seal on the inward side retains grease without adding unnecessary drag from that direction. The combination gives you maximum protection with minimum resistance.

How do I confirm the MR 15307 fits my application?

Measure your existing bearing with calipers. If the inner diameter is 15mm, outer diameter 30mm, and width 7mm, this is the correct size. Verify the part number on your existing bearing if visible.

Best For

Mechanics replacing non-standard bearings in premium hubs, cranksets, or suspension linkages where ABEC-5 precision matters for feel and longevity. The Enduro MR 15307 is the right choice when you need a high-quality 15x30x7mm bearing and won't find it at a standard ABEC-3 spec.

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