T TCoop924 Monkey Jul 29, 2002 117 0 WA Aug 2, 2003 #1 Hi...Stupid question probably...but what does the "104" in a crank bolt pattern description mean? Such as, "4x104". I know the 4 stands for 4 bolts.
Hi...Stupid question probably...but what does the "104" in a crank bolt pattern description mean? Such as, "4x104". I know the 4 stands for 4 bolts.
jonassterling Chimp Mar 27, 2003 66 0 Aug 2, 2003 #2 104mm = bolt circle diameter, or BCD. It is the measurment from center to center of the shainring bolt holes.
104mm = bolt circle diameter, or BCD. It is the measurment from center to center of the shainring bolt holes.
