How can I find out what the seat post size is? I have an integrated headtube and need to replace the bearing inserts. How can I do this? I have an integrated headtube what headset choices do I have? My bike has the pressed in bottom bracket, can I get it updated to accept newer style cranks and bottom brackets? My bike has the pressed in bottom bracket, where can I get parts? Where can I find Merlin clothing and accessories? How can I find out what diameter my front derailleur clamp is? What fork rake does my bike have? Where can I get new decals for my Merlin? I have an older Merlin, could you tell me what year it is? How can I find out what diameter my front derailleur clamp is? As a general rule any bicycle with a 31.6 seat post will have a 34.9 front derailleur clamp and any bicycle with a 27.2 post will have a 31.8 clamp 31.8 clamp size on Road, Cyrene, Agilis, Extralight compact, Fortius and size 54 and below Extralight 34.9 clamp size on Magia, Solis, 55cm and larger Extralight, Cielo, Lunaris, Proteus, XLM, Oreas, Mountain, CR works, and TR works.