CANECREEK Serie 40 Cartridge Bearing 41MM 36 x 45 Degree Each

Crane Creek ZN40 Bearing 41MM Zinc Plated (you need to order2) fits my headset. The old bearings had the label "MH-PO3M" etched into the sides. I tried twice to order from other suppliers using this information and twice I was promised my order was on the way, but later it never delivered. I ordered this based on Amazon's suggestion for "related products" after I read some of the reviews that said it fit their Trek. I feel like there was a lot of luck involved in my choice. I am writing this hoping to help someone in a similar situation. Please don't start asking me "Will this fit my......(fill in the blank). I will not answer. I am only saying it is an exact fit for "MH-PO3M and I don't know what is in your headset. Can't tell how long it lasts or anything like that because I just installed them. My headset is not tapered, so I ordered 2 same size. If yours is tapered, the top and bottom will be different and I can't help you.

Not perfect quality but got the job done for a Zektor 3. Since the integrated headset used the same size as this crane creek headset. You can use two of these as a bottom and top bearing for straight steerers and don't let anyone else tell you otherwise. We will see on longevity.

Works great. My Cane Creek bearing was broken and got this one for replacement. Did some research and purchased this one. It worked perfect!

Perfect fit. Smooth turns. Didn’t have to deal with the local bike shops that are swamped with customers. It’s a bearing. Hard to mess this up.

Fit perfectly in my IS6 hub.

Works very well. Not the very best bearing you can get but good enough. Should last quite a while. Original Cane Creek bearings that came with the bike seemed to be of slightly better quality. Still these work very well, smooth and precise.

Did the trick, fits 2013 trek madone 2.3 perfectly. Should fit any trek road bike pre iso era

Excellent set higly recomended very happy with purchase.Cane creek same like was on my bike

Perfect fit for my bike great service and quick delivery just what I needed