Headset bearings

I'm trying to get hold of some bearings for a Planet X headset. I know the sizes and general description but no bike shops seem to sell them seperately. Does anyone know a place that sells a good range of bearings? Bike shop or general bearing specialist maybe.

maybe, some more details would help. also, there's lots of threads on bearings, searching these could be of interest to you

www.mercuryltd.co.uk - Mile End

Got sealed wheel bearings there a while ago.

Sealed cartridge bearings. One says 51.8x8x45 the other 51.5x40x7. They both have a 45 degree angle.

Actually first one is 41.8x8x45. Gave Mercury a ring, gonna email a pic to them and see what they come up with.

N.B. Get a price from the office, the guys on the trade desk just make it up depending on how clueless you look.

sounds to me like a classic 1.5 to 1 1/8 taper bearing, something like a FSA orbit 1.5 or C 40 should fit

upper bearing MR054 (873-2RS)

lower bearing MR110 (073-RS)

one question, does this fit into cups inside the headtube or seat directly into machined recesses?

It's a 1 1/8 to 1 1/2, bearing seat into machined recesses.

ah ok, FSA orbit 1.5 or C-40 not the ones, NO.42-48CF-ACB what you require

upper bearing MR121 (870E-RS) > http://www.ukbikestore.co.uk/product/140/160_6480/fsa--870-campag-compatible-micro-acb-headset-bearing.html

lower bearing MR110 (073-RS) > http://www.ukbikestore.co.uk/product/140/160_6740/fsa-1-5---73-headset-bearing.html

I know this is an old thread, but I am now in the same position as the OP. I ordered the lower bearing as linked above, but this is 51.8 O/D and I need 51.5.

Does anyone have any ideas where to get the illusive 51.5 bearing from? I have tried the 'standard' bearing companies. Even trawled through the Chinese frame thread and scoured through the provided links in there, but to no avail.

I know Ribble's Stealth headset fits, but they too are out of stock with no date for replacements. It seems so stupid that a whole frame becomes redundant over 0.3mm.

Any suggestions/pointers would be greatly appreciated.

Thanks in advance,

Matt

Ream the frame?

Anyone else make any progress with this? I'm also after a set of bearings for my Planet X Nanolight