Shadow + puts the most tension on the derailleur of any shift system, meaning less chain drops and no chain slap. Shimano's Deore series has been on the market for more than 30 years and has been constantly optimized and enhanced. It features impressive, tried-and-tested technology and is extremely reliable, well-engineered and easy to use. Shimano Deore gears have proven their worth for many decades and are indispensable premium components even in the E-Bike sector. Shimano Shadow + is featured on 10-speed Deore or 11-speed Deore XT - with a lite version on Alivio 9 speed.
A well-maintained derailleur system has the most efficiency of all the possible types of bicycle gears. This is important for sporty riders who want snappier shifts and to squeeze every last mile of range from their E-Bikes.