Bicycle BB Bearings 163110-2RS
16
31
10
0.5
489
230
16000
19000
25.8
The 163110-2RS is a bicycle bottom bracket (BB) bearing from ISK Bearings, with a 16mm bore, 31mm outer diameter, 10mm width, and a 0.5mm chamfer, sealed with rubber on both sides (2RS). The bottom bracket is a key junction linking the crank to the frame, carrying pedaling loads together with a degree of lateral force during each stroke. Operating conditions vary meaningfully across bike types—road, mountain, commuter, and e-assist bikes each differ in load intensity, rotational demand, and exposure. The 2RS double seal helps keep water, mud, and dust out of the raceway. Whether it fits your bike type and use case is best confirmed against your actual working conditions.
How a BB bearing feels and performs in real use is shaped by load, environment, and lubrication—not by the part number alone. Sharing just two or three details helps us assess whether this spec suits your application: first, the main bike type and operating environment (for example, whether it's often ridden in wet, muddy, or dusty conditions); and second, the expected riding intensity or load scenario. If you already have a current part number, drawing, or sample, feel free to include it so we can cross-check dimensions and fit. We won't rush to a conclusion—we prefer to understand the conditions first, then advise.
The 16×31×10, r0.5 figures confirm the bearing itself—but once it goes into the bottom bracket, the fit with the shell bore and the crank spindle matters just as much. A press fit that's too tight or too loose can affect how the bearing runs and seats, and that outcome usually comes from the interaction of housing tolerance and mounting method rather than the bearing alone. If you're at the design or replacement stage and have questions about shaft and housing fit or tolerance ranges, share your current mounting conditions along with your inquiry. We can help evaluate whether this size suits your setup and point out installation details worth watching.
ISK holds IATF 16949, RoHS, REACH, and SGS certifications, with products exported to more than 50 countries across a range of manufacturing supply chains. If, beyond the standard part, you have specific lubrication, sealing, or downstream processing needs, let us know when you inquire—ISK will confirm feasibility based on the actual part number and conditions, rather than assuming everything is available up front. Whether you're a bicycle brand, an assembly plant, or a component developer, if you already have a part number, spec, drawing, or sample, share your application background and we'll help you work out the next step.
Get spec confirmation and a quote for 163110-2RS →
Some non-standard or currently out-of-stock bearings may not be immediately available. If you have specific requirements, feel free to contact us — we will do our best to confirm lead times and provide alternative solutions.
