A bearing looks almost identical to the one removed from an RC hub, but it will not seat correctly. Small differences in diameter or width matter more than the photograph on the product page.
Start with the parts diagram
Find the model’s exact version and the bearing part number in its manual or exploded diagram. Different versions of a vehicle can use different components in a similar-looking assembly. Keep the removed bearing’s location recorded so it does not become mixed with another size.
Check the specified inner diameter, outer diameter and width. A listing may present these in a compact sequence, so confirm the units and order. Do not assume that the first number always means the same thing on every retailer’s page.
Measure to confirm, not to force a match
Clean the outside sufficiently for a careful measurement without damaging seals or introducing debris. Use a suitable measuring tool and compare the result with the official specification. A worn or dirty part can make measurement less reliable.
For an invented example, two bearings share the same bore and outer diameter but differ in width. The wider one may interfere with the assembly even though it fits over the shaft. All three dimensions belong in the comparison.
Check the protection and installation method
Shield and seal types affect the design, but a casual label such as “sealed” is not a complete specification. Follow the vehicle maker’s requirement and the bearing supplier’s information. Do not assume a bearing makes an assembly waterproof.
Use the prescribed installation method and appropriate tools. Pressing through the wrong part of a bearing or hammering an uncertain fit can damage it or the housing. If it does not seat as expected, stop and verify the part rather than increasing force.
After reassembly, check movement as the manual directs before powering the vehicle. Keep the part number and dimensions in your maintenance notes. The useful replacement is the one that matches the actual assembly, not the one whose online image looks closest.