Headset bearings - which ones for my road bike

Don Juan II

I'm trying to figure out which headset bearings to order for my roadbike.

I've taken them out and the bottom bearings are a small bit rough and need replacing.

The exact writing on the top bearing is:
"FSA TH MR 121 1-1/8 45x45 F8"
I don't need to replace the top one however (and it's not the same size as the bottom one)

There is no writing on the bottom.
The measurements of the botton is:
· outer Ø: 41.4 mm
· inner Ø: 30.3 mm
· height: 6.5 mm
· bearing angle: 45° x 45°

Anyone have any ideas where I can get the bearings?
Thanks

RobertFoster

I've bought from Rulla Bearings in the past (via eBay).

Sounds closest to MH-P03 to me:

MH-P03 30.15 x 41 x 6.5 45°/45°
MH-P08 30.15 x 41.8 x 6.5 45°/45°

Search online for the name and year of your bike to make sure.

Don Juan II

RobertFoster wrote: »

I've bought from in the past (via eBay).

Sounds closest to MH-P03 to me:

MH-P03 30.15 x 41 x 6.5 45°/45°
MH-P08 30.15 x 41.8 x 6.5 45°/45°

Search online for the name and year of your bike to make sure.

Super RobertFoster - exactly what I was looking for. I've ordered a MH-P03. I reckon that's the right one

Luxman

RobertFoster wrote: »

I've bought from Rulla Bearings in the past (via eBay).

Sounds closest to MH-P03 to me:

MH-P03 30.15 x 41 x 6.5 45°/45°
MH-P08 30.15 x 41.8 x 6.5 45°/45°

Search online for the name and year of your bike to make sure.

There seem very well priced indeed. I paid way over that price last year. I was just happy to find somewhere that had what I wanted, so thanks a mill

at1withmyself

Have also used this crowd in the past:

https://www.edgesportsuk.com/store/components/headset-bearings.html