1/4" steel balls for Shimano wheel hub bearings Y00091370

Shimano stainless steel replacement ball bearings for wheel hubs

Shimano Y00091370 1/4" stainless steel balls are replacement parts designed for refurbishing the bearings on certain wheel hubs Shimano. With a diameter of 1/4" (6.35 mm) and supplied in packs of 18, they are used to replace worn balls in a tapered roller bearing, restoring smooth and precise operation to the hub.

Made from stainless steel, these Shimano balls offer good corrosion resistance and are particularly suitable for regular cycling use, on-road or off-road, depending on the hub’s compatibility. Shimano specifically lists part number Y00091370 for certain specific hubs.

Key features of the Shimano Y00091370 bearings

• Shimano reference: Y00091370.
• Diameter: 1/4", approximately 6.35 mm.
• Made from stainless steel.
• 18 balls per packet.
• Shimano genuine parts.
• Intended for ball hub bearings.
• Good resistance to corrosion.
• Can be used to replace marked or worn balls.
• Suitable for certain front and rear hub configurations Shimano.

An essential part for hub overhaul

Shimano tapered roller bearings use loose balls between the bearing surfaces. Over time, the balls may become scored, corroded or worn, which impairs the smooth rotation of the hub.

Replacing the balls may therefore be advisable during a hub overhaul, particularly if the hub has play, stiff spots or is not rotating as smoothly as it should.

It is recommended that the balls be replaced with parts of a diameter and quality suitable for the hub in question. A ball of the incorrect size may prevent the bearing from being correctly adjusted and cause premature wear.

18 x 1/4" balls

The packet contains 18 1/4" stainless steel balls. This quantity corresponds, in particular, to the requirements specified by Shimano for certain applications.

Please note, however, that the number of balls required depends on the hub model. Shimano states that the quantity required varies depending on the model. It is therefore important to check the exact part number of your hub before fitting.

Shimano Y00091370 Compatibility

Part number Y00091370 is specifically recommended for the following hubs:

• FH-MT200-B
• FH-TY500
• HB-7710-R
• HB-7600-R

For these applications, Shimano and specialist retailers specify 18 balls.

This part number should therefore not be selected solely on the basis of the 1/4" diameter. Several Shimano ball bearings have the same diameter but different part numbers depending on their application.

Why choose stainless steel?

Stainless steel offers good resistance to corrosion. This is a significant advantage for a bicycle exposed to damp, rain, mud splashes or frequent cleaning.

Bears in good condition also help ensure the smooth operation of the bearing system. During a service, it is advisable to inspect the cones and cupsat the same time : if their surfaces are pitted or marked, simply replacing the balls will not necessarily be enough to restore the bearing to perfect working order.