Quick answer

Choose the bearing that matches your machine's original part number and physical size. The 6202 fits select Sunny cycles and ellipticals, while the 6004 fits a broader range of models—check your equipment before ordering.

Why bearing size matters

Bearings are precision parts that reduce friction in rotating components like cranks, wheels, and pedals. Using the wrong size can cause poor fit, wobble, or premature wear.

The 6202 and 6004 have different bore, outer diameter, and width. Even if they look similar, they are not interchangeable. Always verify the part number stamped on your old bearing or check your machine's manual.

Compatibility differences

The 6202 is listed for Sunny models SF-RB4876, SF-RB4806, and SF-E3810. The 6004 fits a wider range including SF-B1002, SF-B1851, SF-E3890, SF-B1879, SF-E3810, SF-B1964, and SF-E320047.

Notice that SF-E3810 appears for both bearings—this means you must still confirm which bearing your specific unit uses. The same model name can have different revisions or parts over time.

How to choose between 6202 and 6004

  • Check the old bearing: Remove the bearing and read the number stamped on its shield or side. If it says 6202 or 6004, order that exact number. Never rely on the machine model alone—always match the part number.
  • Measure the dimensions: If the number is worn off, measure the inner hole (bore), outer diameter, and width. Compare these to the catalog specs for 6202 and 6004 to identify the correct one. A caliper gives the most accurate reading; if you're unsure, contact support with your measurements.
  • Use the compatibility list as a guide: Check the list of compatible models for each bearing. If your model appears on one list, that's a strong hint—but still confirm the part number because some models use both. The compatibility list is a starting point, not a guarantee.

Product facts

  • Bearing 6202: Bearing 6202 is a 1-piece replacement part compatible with SF-RB4876, SF-RB4806, and SF-E3810. If you own one of these models, this is the bearing you likely need—but still verify size and fit before purchasing.

    Bearing 6202

    Bearing 6202

  • Bearing 6004: Bearing 6004 is a 1-piece replacement part compatible with SF-B1002, SF-B1851, SF-E3890, SF-B1879, SF-E3810, SF-B1964, and SF-E320047. This bearing covers more machines, making it a common choice for a wider range of Sunny indoor cycles and ellipticals.

    Bearing 6004

    Bearing 6004

Fit guidance

Best for

  • Owners of Sunny SF-RB4876, SF-RB4806, or SF-E3810 who need a 6202 bearing
  • Owners of Sunny SF-B1002, SF-B1851, SF-E3890, SF-B1879, SF-E3810, SF-B1964, or SF-E320047 who need a 6004 bearing

Not for

  • Machines that use a different bearing size—always verify before ordering