Enduro 6903 Sealed Cartridge Bearing

Enduro 6903 Sealed Cartridge Bearing Enduro

Enduro 6903 Sealed Cartridge Bearing

Enduro 6903 Sealed Cartridge Bearing

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Is the Enduro 6903 the Right Standard Bearing for Your Pivot?

The Enduro 6903 Sealed Cartridge Bearing is built to Enduro's standard design spec, delivering reliable performance in the 17mm x 30mm x 7mm form factor found across a range of suspension pivot, headset, and hub applications on road and mountain bikes. Mobilux NGLI 2 synthetic grease at a 90% fill ensures consistent lubrication through the bearing's service life. Dual-lip labyrinth seals provide solid protection against dirt and moisture ingress while keeping drag to a minimum.

Compared to the Enduro Max 6903, this standard version is better suited for lower-stress applications such as headsets and hub flanges where the multi-directional forces of active suspension are not a factor. Enduro's precise manufacturing tolerances ensure a clean press fit and reliable operation over a full riding season. For mechanics looking for a straightforward, correctly-spec 6903 cartridge bearing at an accessible price, this is the one.

$8.25
$8.25
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8 in stock

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

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Specifications

  • Bearing Number: 6903
  • Inner Diameter: 17mm
  • Outer Diameter: 30mm
  • Width: 7mm
  • Series: Standard Design
  • Seal Type: Dual-lip labyrinth
  • Grease: Mobilux NGLI 2 synthetic (90% fill)
  • Application: Headsets, hubs, lower-stress pivots

FAQ

When should I use the standard 6903 vs the Enduro Max 6903?

Use the standard 6903 for headsets, hub flanges, and lower-load pivot positions. Choose the Max 6903 for suspension pivots that see heavy lateral loading, where the full-complement design and deeper race grooves provide meaningfully better durability.

What bikes commonly use a 6903 bearing?

The 6903 (17x30x7mm) appears in headset cups, rear hub flanges, suspension linkage pivots, and some pedal axle designs across a wide range of road, gravel, and mountain bikes.

How do I install a cartridge bearing correctly?

Always press bearings in using a tool that contacts only the outer race. Never hammer directly on the bearing or press through the balls. A bearing press or appropriately-sized socket makes a clean, square installation that won't damage the bearing on the way in.

Best For

Mechanics doing routine headset or hub bearing replacements where the original bearing was a standard 17x30x7mm design. The Enduro 6903 is an affordable, correctly-spec replacement for non-pivot applications where a premium Max bearing is more than the job requires.

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