Headset bearings - which ones for my road bike

Don Juan II · 02-09-2019 08:44PM #1

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 · 02-09-2019 09:05PM

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 · 02-09-2019 10:08PM

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 · 03-09-2019 12:11PM

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 · 03-09-2019 12:29PM

Have also used this crowd in the past:

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

Headset bearings - which ones for my road bike

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