Originally Posted by
Cpn_Dunsel
Umm, no.
A 1x system has the chain ring positioned on the nominal chain line so it more closely lines up with the center of the cassette - like the middle ring on a 3x system. This reduces the lateral angle of the chain when on the largest or smallest rear sprocket compared to the classic cross-chained state.
The problem of cross-chaining on a 2x is the chain rubbing on the FD plates and/or on the inner side of the of the large chainring when in extreme positions. Noise = wear and annoyance. A 1x eliminates this factor and as such, there is by definition, no cross chaining.
Cross chaining with traditional rings will put the chain in the angular region where it ‘thinks’ you want to shift. On a 1x system a narrow wide ring is typically used, or a similar device, that meshes more completely with the whole chain link. Since it doesn’t have to worry about shifting, it’s only worried about retention, so it can ease the chain into a consistent position from a wide variety of angles.
A traditional ring is made to allow shifting, which means there are specially shaped teeth and protrusions that will pick up the chain and help lift it in to the next gear and this is why cross chaining is an issue with 2x (or 3x) and not a 1x.
I like this. Now my 3X is in reality a new trendy 1X with 2 backups...
