Showing all 6 locations.
At the centre of each wheel, around the axle — not inside the rim.
A bicycle wheel hub may use adjustable cup-and-cone bearings or replaceable cartridges. Identify the hub design before choosing loose balls, a cartridge or a complete assembly. Front and rear parts are not automatically the same.
How to recognise it
Cup-and-cone: balls run between cups in the hub and cones on the axle. Cartridge: a separate ring-shaped bearing fits in the hub shell.
Do not assume: Wheel diameter and rim size do not identify the hub bearing. Do not copy a common loose-ball count to an unidentified hub.
Record before looking up a part
0 of 4 identification details recordedBasis: Park Tool — Hub Overhaul and Adjustment: Cup and Cone Style. Source scope
02Freehub body
Cassette-body bearings
On the rear hub, underneath the cassette.
The cassette-carrying body and its engagement mechanism are distinct from the main wheel-hub bearings. Freehub designs differ: some use loose balls, others cartridges, with different pawl or ratchet arrangements.
How to recognise it
Identify the complete hub and freehub version. A cassette spline pattern alone does not specify the bearings, spacers or engagement mechanism inside.
Do not assume: Lubrication and dismantling instructions are design-specific. Main hub grease is not a universal freehub lubricant. A new wheel bearing will not necessarily fix slipping engagement.
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0 of 4 identification details recordedBasis: Park Tool — Freehub Service. Source scope
At the upper and lower ends of the head tube, around the fork steerer.
These bearings let the fork turn relative to the frame. Identify the upper and lower assemblies separately. Headset interface codes describe the frame/fork arrangement; they are not simply cartridge part numbers.
How to recognise it
EC uses an external cup; ZS seats a cup within the head tube; IS seats the bearing in the frame. A replacement cartridge also needs its dimensions and seating angles checked.
Do not assume: “1⅛ inch headset” alone is not enough to select a cartridge. Equal outside diameters do not prove that seating angles or assembled heights match.
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0 of 4 identification details recordedBasis: Cane Creek — Headset Identification Guide. Source scope
Where the crank spindle passes through the lower part of the frame.
The bottom bracket supports the crank spindle. Its frame interface, spindle interface and bearing size are different specifications. Systems include adjustable cup-and-cone, integrated-spindle cartridges, external-bearing cups and press-fit arrangements.
How to recognise it
Record the exact system, not just visible tool notches. Thread-together cups can fit a smooth frame shell; visible threads or wrench fittings do not by themselves establish the frame standard.
Do not assume: A 30 mm crank spindle does not determine every other dimension. Do not replace a complete integrated-spindle unit by assuming that its internal bearings are separately serviceable.
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0 of 4 identification details recordedBasis: Park Tool — Bottom Bracket Identification. Source scope
Inside each pedal body, around its own spindle — separate from the bottom bracket.
Identify the pedal model and generation before choosing service parts. A pedal can combine more than one bearing technology: Crankbrothers' listed refresh kit, for example, includes Igus ll-glide bearings, Enduro MAX cartridges and sleeve bushings.
How to recognise it
A bushing or plain bearing is not a missing cartridge. Inner and outer positions may require different components; a kit for a similarly named pedal is not automatic evidence of compatibility.
Do not assume: The cited kit is one design example, not a specification for all pedals. No universal pedal-bearing number, grease quantity or tightening torque is provided here.
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0 of 4 identification details recordedBasis: Crankbrothers — Pedal Refresh Kit specifications. Source scope
At linkage joints on a full-suspension frame. The illustration marks a representative joint, not a frame-specific layout.
Pivot bearings work through short arcs under load rather than spinning like wheel bearings. Enduro distinguishes pivot-focused bearing, seal and grease choices from continuously rotating hub and bottom-bracket applications.
How to recognise it
Identify each frame joint separately. A bearing marked for a pivot application is not a universal upgrade for a wheel hub just because its dimensions match.
Do not assume: A rigid or hardtail frame may not have rear-suspension pivots. The diagram is not an instruction to dismantle a loaded linkage or shock mount.
Record before looking up a part
0 of 4 identification details recordedBasis: Enduro — Bearing Basics. Source scope