Bike Forums - View Single Post - 47.5 versus 50mm chainline

10-20-09, 05:05 PM

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CCrew

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47.5 versus 50mm chainline

Looking to replace a cheapo Shimano M191 crankset that spec's at a 47.5mm chainline with a Shimano LX that spec's at a 50mm chainline. The M191 uses a JIS BB versus the Hollowtech II on the LX, so I really don't have the option of different BB widths. Is that 2.5 mm of chainline going to cause me issues and if so what should I anticipate?

I'm swapping from 8 speed to 9 speed including shifters (LX Dual Control) and Front (XT) and rear (Ultegra) derailers at the same time if that matters.

Thanks..

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