Choose inline speed skate bearings by checking fit, construction and the maintenance your skating conditions require. Ceramic, steel and Swiss labels describe different aspects of a bearing. Understanding those differences makes it easier to compare specific models.
Start with the wheel and axle you already use. Then decide whether you need a replacement training set or want to compare a racing option with your current bearings.
Ceramic and steel bearings
In an all-steel bearing, the balls and rings are steel. A hybrid ceramic bearing combines ceramic balls with steel rings. Ceramic balls are lighter than steel balls, but the complete bearing also includes rings, a cage, shields and lubricant.
Material alone does not establish which set will give you the best result on skates. Compare the complete model and its intended use, including its fit, lubrication and servicing requirements.
The Bont JESA 608 Ceramic inline bearing uses ceramic balls, a plastic cage and a steel outer race. Bont lists it as made in Switzerland, with dimensions of 8 mm by 22 mm by 7 mm. It fits 8 mm axles and is supplied as a pack of 16, with spacers supplied separately.
What Swiss means
Swiss identifies an origin or product description; it does not identify the ball material. A bearing made in Switzerland can use steel or ceramic balls. Check the manufacturer and the specifications of the exact model you are considering.
For example, the JESA Ceramic model combines Swiss manufacture with ceramic balls. Those are two separate facts about that product. Avoid assuming that every bearing described as Swiss has the same construction.
Understand ABEC and hand spin
ABEC ratings describe manufacturing tolerances. They do not provide a complete skating performance score. Lubrication, contamination, bearing condition and installation also matter. Our roller skate bearing guide explains the rating in more detail.
A wheel spinning freely in your hand is not carrying your weight. Use that check to notice obvious binding or a change in condition, then inspect the setup. Do not use unloaded spin time alone to rank racing bearings.
Match the bearing and spacer to the wheel
The 608 format has an 8 mm bore, 22 mm outer diameter and 7 mm width. Mini 688 bearings have different outer dimensions, so they are not a direct replacement in every wheel. See our mini bearing compatibility guide before changing formats.
Confirm the spacer specified for the wheel rather than applying one dimension to every inline wheel. Our inline speed skate wheel guide covers wheel and frame compatibility checks.
Count the bearings needed for your setup. With two bearings per wheel, a pair of four-wheel inline skates needs 16; a pair of three-wheel skates needs 12. Check what the selected pack includes.
Maintain the set you choose
Check bearings when they become noisy, gritty or bind. Follow the model's servicing instructions and use compatible cleaning products and lubricant. Ceramic balls do not make a complete bearing maintenance-free.
Our bearing cleaning guide covers inspection, cleaning and reinstallation. Check the wheel and spacer fit as part of that process before attributing a problem to the bearing material.
Make a useful comparison
Record your current bearing model, wheel, spacer and main training conditions. Compare that setup with the specifications of the replacement you are considering. If you trial another set, keep the rest of the setup consistent so you can judge the change more clearly.
Browse Bont inline skate bearings for the current range, and compare dimensions, construction, pack contents and servicing requirements before ordering.