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Powerlink and connex link(6 posts)

Powerlink and connex linkWoof the dog
Jan 1, 2004 5:10 PM
Connex link was 6.62 mm (advertized as 6.5mm right on the box), powerlink was over 6.8mm, don't exactly remember the number. That was just one of each, but I doubt within their sample groups they'd differ by more than, say, 0.05mm.


Woof the dog.
Another data pointNessism
Jan 1, 2004 7:53 PM
Two Powerlinks measured: 6.80 mm and 6.84 mm wide across the pins.

Two Shimano Dura Ace 7001 chains measured: 6.64 mm and 6.66 mm wide across the pins.
relevant dimensions...C-40
Jan 2, 2004 6:10 AM
The important dimension when measuring a connector link for compatibility with another brand of chain is not the outside, but the inside width between the sideplates.

The link should be assembled and inside calipers used to take the measurement. The inner width can then be compared to the width of the mating chain. Obviously, a small amount of clearance is required to prevent binding.
relevant dimensions...Woof the dog
Jan 2, 2004 9:29 AM
My feeling is that if the links are made out of a similar material, the plates would have to be similar in thickness to have the same strength. So essentially the width of a chain pin is what determines the space between the plates. In powerlink the pin is longer and plates are further apart, which translates into sloppiness when put onto durace chains. Connex link is better in that respect because it is narrower.

Jan 3, 2004 7:43 AM
The width does not determine the space between the plates unless the plates are exactly the same thickness. The thickness of the sideplates on 10 speed chain is substantially less than 9-speed chains, but the 10-speed chains are still perfectly reliable. The strength of the sideplates is not the limiting factor which causes chain failure.

If you want to know if a link will fit a chain properly, it's the inside you should be measuring, not the outside.
mmmmWoof the dog
Jan 5, 2004 11:06 PM
I was talking about 9 speed because this is all I ride, and 9 speed chains fit 7 speed freewheels no problem too.

I would assume that the plates in a powerlink and a connex link would be of similar thickness, though can't be sure. In this case, it is simply the pin length that matters.

I agree on the general rule of measuring the inside.