2PCS Hybrid MR2437 Ceramic Ball Bearing | 24X37X7mm 24377-2RS | Si3N4 Balls, Rust-Resistant

MR2437s are meany to fit in a bicycle bottom bracket. I was skeptical at this price, half the comps and 10% or the big names. They were smooth, they fit nicely in the BB90, and I'll put in an update if I break them, but they work!

Put a set of these bearings in my Wheels Manufacturing Bottom Bracket. ABEC 5 ceramic hybrid are the highest rated bearings I can find in this size. I will get another pair so I can always have a clean set ready.

I did not know that I would need spacers and a dust cover. The OEM dust cap fits through the OEM bearing and has a lip that pops out the other side of the bearing to keep it in place. The inner diameter of these bearings is smaller than the OEM bearings, so the OEM dust cap doesn't fit - so, I needed a spacer and dust cap. Fortunately, I got a different bearing kit at the same time as this one that came with spacers and covers. I used these Abec-5 with the spacers/covers from the other kit.

Bought these to replace the crank bearings in my bike. Should be the same but the ID was 0.002” smaller. The outer dust over would not snap back into place since it’s secured via the ID. OD was fine, bearings felt smooth. Shipping took 2-3 additional weeks from the 1 month lead time I was given

Los rodamientos de mi bicicleta TREK quedaron muy suaves con este tipo de rodamiento.

Very good quality, but does not fit my FSA K-Force Light crank.

Fit my Trek Madone 5.5 hollow crank perfectly

These lasted for two rides, then.... Crunch. I anticipated this would happen so fortunately I had a set of Enduro plain old steel bearings. Those usually last for 3-6 months in my Wheels Manufacturing BB30 Shimano 24 mm adapter.