SRAM PC-991 and Shimano HG73. I ran these bad boys through the ultrasonic and after I dried them off I decided to measure them with my digital calipers and see how they differ. The SRAM looked bigger (and measured out that way) than the Shimano which I found interesting being as they are both 9 speed chains. I dont know if any of this makes much difference but thought some may find it interesting. Only thing I see is that perhaps the smaller size of the shimano would make it more likely to break on the plates but perhaps stronger on the pin due to that being bigger.
Measurements are as follows (All measurments done on big links).
Link length (measured across outside of link):
HG73- 20.88 mm
PC-991- 20.75 mm
Link Height (measured at tallest area where pin is):
HG73- 8.26 mm
PC-991- 8.34 mm
Link Width (measured at widest part of link in the middle):
HG73- 6.52 mm
PC-991- 6.53 mm
HG73- 3.75 mm
PC-991- 3.65 mm
Roller Width (measured across roller length wise):
HG73- 7.52 mm
PC-991- 7.58 mm
Also of note the clearance between sideplates of the bit links and the small links is twice as large on the Shimano chain. I figured this would mean more flex in the chain laterally but they both have the same amount of side flex along the chain. I figure that the extra clearance would make it easier for dirt to enter the Shimano chain.
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