I understand all that, but the published timelines people refer to are wrong. The Crux I'm working on here is the current model.Calnago wrote: ↑Thu Aug 02, 2018 3:26 am@Ergott... the whole “OSBB” thing is a clusterf#%¥ of nomenclature. The Crux you are working on has the “old” OSBB with the narrower BB shell (61mm I believe). I worked on one of these some time ago. I used a Praxis BB but also had to use two 3.5mm spacers on either side of the shell to essentially widen it to the standard 68mm shell. All worked out fine. The narrower BB shell was a disaster as Specialized tried to differentiate themselves from Cannondale. A narrow shell with loads grinding away on the outer edges did not play well with longevity. Anyway, they’ve moved from that but I think they still use the “OSBB” term. Currently I don’t think they have any “narrow” OSBB shells in the lineup.
https://www.specialized.com/us/en/s-wor ... 487-129101
The Tarmacs I've worked on are 2016 SL5. Both are stated as BB30 by BB literature everywhere. That's why I asked if anyone has actually measured the SL6.
The bearing to bearing measurement for the bikes I refer to is 63.5mm, not 61mm. This, just like when I build wheels, is why I measure stuff. So much misinformation online.