[CFBlue]

Have noticed some D/A chains are 7800 and some are 7801. Any imput to the differences? Thanks!

 

[mecam]

I believe the 7801 is narrower. You have to user a caliper to see the difference.

 

[palewin]

Difference is the replacement pin

Have noticed some D/A chains are 7800 and some are 7801. Any imput to the differences? Thanks!

The difference is the "replacement pin" (or whatever Shimano calls them) that you use when you are joining the ends of the chain together. The 7801provides slightly more positive "feel" when you are pushing it into place with the chain break tool. With the 7800 pins many people didn't get them seated correctly, and then they had problems with chains breaking (i.e. coming apart) under use.

 

[CFBlue]

Thanks for the addtional informatin...it was helpful!

 

[RSPDiver]

Thank goodness for a sucessful search!

So, if I understand palewinds post correctly, the 7801 pins can be used on 7800 or 7801 chains? Sorry for such an elementary question if this has been covered.