Tino,
I haven't used this exact setup, but you should be fine. An eighth of an inch is plenty - and chainsuck will tear up the stay no matter where the rings are. That's all up to ring and chain wear, and a bit of proper derailleur adjustment, anyway. As long as all the rings have clearance, you should be good.
Remember that the new XTR BB is a through-axle design, so the measurement will be longer than the first, splined XTR BB's. 116mm was the longest 950/952 made - an Ultegra or 105 118.5mm might work, if the shell is a 68. I'm thinking that Specializeds are 73mm, though, so the 116 will have to do.
Jon.
I haven't used this exact setup, but you should be fine. An eighth of an inch is plenty - and chainsuck will tear up the stay no matter where the rings are. That's all up to ring and chain wear, and a bit of proper derailleur adjustment, anyway. As long as all the rings have clearance, you should be good.
Remember that the new XTR BB is a through-axle design, so the measurement will be longer than the first, splined XTR BB's. 116mm was the longest 950/952 made - an Ultegra or 105 118.5mm might work, if the shell is a 68. I'm thinking that Specializeds are 73mm, though, so the 116 will have to do.
Jon.
