sourcing map 6904-2RS Deep Groove Ball Bearing Double Sealed 1180904, 20mm x 37mm x 9mm Carbon Steel Bearings (Pack of 2)

Used these to replace bearings in wheel hub. Worked a treat and wheel is spinning perfectly. Not expensive or specialised but will do and with a bit of DIY knowledge easy to change as required.

Quick delivery and look the part, but they are a light duty bearing at best. Not suitable for high load applications, I put these in my road bike bottom bracket and they have not lasted long at all.

Great product

Bought these bearings as an emergency backup, cheap bearings so not expecting anything amazing but went to finally use and the sizing is completely incorrectly produced. The inner diameter on a 6903 bearing should be 17mm, these measure up at approx 18mm and as such are completely and utterly useless.Was baffled as to what was going on when i initially went to use them and they were loose on a shaft which should be press fit, then measured to discover the issue.External diameter and thickness correct but inner diameter is way off the mark.Seals have 6903 printed on them so not an incorrect item sent or a mix up just completely incorrectly manufactured.I don't mind using a low performance cheap bearing, normally they do the job fine for a while, but these are absolutely to be avoided.Hopefully my review allows someone else to avoid the ballache I've experienced myself when discovering this.

Turned up promptly and quite cheap but no match for the torque of an ebike - less than 50 miles and it's dead!

Perfect replacement for my bike bearings

Fit nicely into my boosted board pulley