if the sticker just says 'tretubi', it's likely an SL triangle with builder's choice stays and fork. 'tretubi' frames with other than SL generally say so...ie: 'tretubi aelle'. nothing to be ashamed of with SL tretubi. i recently sold a mint basso SL tretubi frameset (w/athena headset) for $400. yes, the SL tretubi took a 27.2 post.