I’ve found that a crankset that comes with rivet-attached sprockets costs the same as cranksets with no sprockets. So we get ripped off either way. The all-in-one piece wastes a crankset everytime the sprocket wears out and probably overspends on sprockets. And the universal crank fleeces you up front by cheating you out of a set of sprockets.

The rivets on my crankset are 72mm apart. Is there any reason I shouldn’t ragefully take an angle grinder to them?

Will I merely have to find sprockets with aligned holes, or could I run into other compatibility issues like mismatched hole sizes or other mating problems?

The bcd cribsheet shows a standard “Shimano 2003 XTR MX960 4-arm middle” has the bolts 72.1mm apart. So it seems I could get lucky though it’s a bit scary that a specific year (2003) is mentioned. Other MX960 specs do not mention a year and have different sizes.

  • hemko@lemmy.dbzer0.com
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    13 days ago

    I tried to find 74mm BCD chainrings for a set of cranks I had, but it was borderline impossible for anything but the small inner chainrings

    That size has been used in past for a stamped together chainring stack (3 speeds), but seem to be very rare nowadays.

    Just ended up buying a new set of cranks with 104mm BCD chainring mount