Are top normal systems more susceptible to chain breaks?
I imagine low-normal derailleurs put less strain on a chain when shifting under load. Is that true?
the low-normal is designed to have less tension when shifting, however your chain should not be breaking just because you have a top normal. Most people run top normal. So you might have another problem. Bad chain, chain too short, cross gearing.
it is my belielf that Shimano introduced "low-normal" RDs to make shifting more idiot-proof and reduce drivetrain damage (tochains and cogs) caused by improper shifting under load. If the load is too high it will just not shift.
Originally Posted by hollisimo
If you know how to shift top-normal shifts better and without damage.
The trouble with common sense is it is no longer common