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I think the Chris’s King ‘familiarity’ on Principia bikes is because CK offered a ‘devolution’ style which combined 1 ⅛ and 1 ¼ bearings which are common in Principias. I agree OEM-fit seems more to be FSA (I have several Principia branded spare FSA ones) and Stronglight on the original Rex with 1” fork

Hi - nice bike. It is a 1998 Rex, the first Rex, with Time 1” fork and chunky Stronglight annular bearing headset. I have one from same year which still goes very well

Hi @Retro_bastard - can you let me know what size the frame is and top tube c to c measurement?

Many thanks

@mikkelneimann - see ebay link https://www.ebay.co.uk/itm/274945251030?hash=item40040396d6:g:T3cAAOSwLtxhP4Vt

@mikkelneimann - very nice track bike and indeed very similar to the Rex road bike. This is my 1998 Rex (not for sale) in the photo

Currently on ebay is this which could be a Rex, but you would need to confirm. Certaily, it is pre Ellipse (and has a Chris King fitted!) https://www.ebay.co.uk/itm/274945251030?hash=item40040396d6:g:T3cAAOSwLtxhP4Vt

Replacement decals are readily obtainable

Happy hunting


The Principia Ellipse and Revolution models (and their 'e', 'sx' and 'Pro' derivatives) are very similar to the Rex models - all top-end Principia and very loverly! @mikkelneimann I wouldn't necessarily rule those out

I think there were two Principia track frames - one with straight head tube and the other with an 'ellipse' version. The non-ellipse one was titled 'Jet' I think

I have Rex, REXe and Ellipse (and an RSL, track and MSLe) frames...all excellent

My REXe sx Pro

Hi - can you confirm the size; I think a 55 c to c for Isaac is a medium. Also, does it include the fork extender to make the geometry correct for track use?

Thanks