CeramicSpeed ALPHA Wheel Bearing 61903/18 2LC 18x30x7mm

ALPHA wheel bearings are built to turn every pedal stroke into speed, spinning freer under load while staying fast season after season.

Pairing CeramicSpeed’s proven low-friction bearing architecture with new hardened stainless-steel races and new custom light-contact seals for an even smoother, more durable wheel upgrade. Hand-built in Denmark, every bearing uses super-smooth CeramicSpeed Class 1 silicon nitride ceramic balls, matched (within microns) to ultra-polished raceways and held by a reinforced polyamide cage for precise, stable performance.

ALPHA wheel bearings are optimised with low-viscosity CeramicSpeed All Round grease to minimise friction and assembled with updated seals to reduce drag further and ensure dirt and moisture are kept out, so performance stays consistent in real-world conditions. Tested to deliver up to 3–5× longer lifetime than standard bearings, ALPHA wheel bearings deliver rapid power transfer and keep top-end speed within reach for longer, across road, time trial, triathlon, track, cyclo-cross and mountain biking in all conditions.

Features:

Hand-built, custom designed CeramicSpeed hybrid bearings
Stainless steel races, CeramicSpeed balls and custom light contact seals
The custom light contact seal design provides increased protection and longevity, without a noticeable increase in drag
New light-contact seals for low drag and maximum moisture protection
New hardened stainless-steel races for improved corrosion resistance and exceptional durability
Class 1 silicon nitride balls: 400% smoother, 128% harder, and 58% lighter than steel

Specifications

Net weight 13 g

Gross Weight 13 g

Width 7.0

Inside Diameter 18.0

Outside Diameter 30.0

Product Code: 117470

Windwave are the exclusive UK distributor for many leading cycling brands, including Transition, Colnago, CeramicSpeed, FSA, DVO and Hutchinson. We are based on the south coast of England and have been trading for over 35 years.

We despatch orders the same working day if ordered by midday. Otherwise, orders will be despatched on the next working day. We use Royal Mail or DPD, depending on the size and weight of the item.