Originally Posted by T-Mar
Tange Prestige came with several tube options. I've seen four seat tube options for the 1990s, that used three different size seat posts. During this period, one of the seat tube options was a double butted 0.8-0.5-0.8 configuration, which would have a 27.0mm inner diameter and be appropriate for a 26.8mm seat post, which is what I believe you meant.
great info! Thanks! Yeah that makes sense. The thin wall tubing is probably meant for lugged frames - the seat lug would help reinforce the seat clamp area. A lugless frame would need more material there.
Originally Posted by T-Mar
Sorry, I do not recognize the serial number format. It's similar to Hodaka but is missing the month indicator. Regardless, it would appear to indicate 1991 manufacture.
what does the month indicator look like? It’s seriously dusty and grimy all over so I could have missed it.