Enduro 6903 Sealed Cartridge Bearing
Bearings
Enduro 6903 Sealed Cartridge Bearing
Enduro 6903 Sealed Cartridge Bearing
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. Read the overview
At a glance
- Bearing number
- 6903
- Inner diameter
- 17mm
- Outer diameter
- 30mm
- Width
- 7mm
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Overview
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.
All the specs
MPN BB 6903 LLB-BAG
- 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
Good questions
Get to know Enduro
There's more to Enduro than this one product. Our Enduro page has the full Enduro lineup we carry and more about the brand.
Visit the Enduro page →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.
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