Nishiki NFS from the early 90ies - which seatpost diameter?

[lesid]

Hello all!

I bought an old Nishiki NFS triathlon bike and i need to fit it with a higher seat post. Can anybody tell me, if I need the 26.8mm or a 27mm diameter version? The 27.2mm from my other bike won't fit. (Measunring those 0.2mm by hand without the proper tool is a bit tricky...)

Thanks for advice!
LeSid

 

[lesid]

Maybe this is helpful for somebody else: i bought a seatpost with a diameter of 26.8mm and it is a bit loose. I think 27.0mm would have been better.