Been looking around for another Sedis SL narrow chain to complete a classic French seven speed group, when I came across this:

Its an NOS Sachs SC-M55 "Power Glide" chain, marked on the box as a "for mountain bikes", and the chain has alternating silver and black links. plus it was going for real cheap, so I got it 9 bucks plus shipping, BIN at ebay. It arrived this evening and as I supected, It looks like it's identical to the Sedis SL chain I got last year, with the alternating black links on the Sachs being the only visible difference.
IIRC, the Sachs chain was actually made by Sedis, so am I really looking at a re-labled Sedis SL narrow chain?
Question is, Is there a fundtional difference between chains sold as mountain bike chains and road chains?? The Sachs chain is also marked "for indexed system" could it be used for regular friction systems. The Sedis SL seems to be working great with my mavic non indexed RD. The wuestion I guess is, what makes a chain "for indexed systems".
TIA,

Chombi

Marketing.

The edge of the links seem rather flat, however I don't know that has any effect on shifting.

SRAM bought or somehow merged with Sachs some time ago.

Here is a little write up from 1996.

https://www.bikepro.com/products/chains/sachs-sedis.html

+1. Differences in road and MTB chain are primarily marketing. Some Shimano boxes are marked Dura Ace/XTR which confirms this.

Index specific chains have countoured side plates and center links which work in conjunction with the contoured teeth on index specific cassettes and freewheesl.

Thanks guys!

On a road bike aith non- indexed RD it wll be used!
Now I wish I bought all four new ones the guy was selling at 9 bucks each. I was only able to cath his last one......

Chombi