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Old 03-20-17, 08:59 PM   #1
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Building a Deore 104 bcd sub-compact crank...

I'm looking to build a subcompact 48/32 crankset based on a 104 bcd Deore crank, and just looking for advice on avoiding any incompatibilities/pitfalls. Looking to start with something like a M610 or M615 crankset, and buy the 104bcd 48t & 32t chainrings separately. 1. Whether I start with a double or a triple shouldn't matter, because either way it will end up with an unused 64bcd mount - right? 2. Is there any m-series 104 bcd crank that won't fit? Going 10 speed cassette/shifters, so probably will favor 10 speed chainrings, but not sure that really matters, even. 3. How do I ensure proper spacing between the chainrings? What length chaingring bolts do I need? Anything else? Appreciate the feedback.
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