Shimano Tourney RS45 Revoshift 7 Speed Shifter

This shifter features a Revoshift shifter, which allows you to securely grip your handlebar and twist it using your thumb and index finger to change gear. This means that you can stay focused on the ride and not have to take your hands of the handlebar. Shimano has also equipped this model with an optical gear display, so you can clearly see the gear you've selected. Coming complete with Shimano Index System technology, this version also uses an index mechanism built in the shifting lever for frictionless, smooth action.

Technologies:
REVOSHIFT Shifter: The REVOSHIFT shifter requires just twisting with thumb and index finger while keeping your hands on the handlebar. Easy and reliable shifting is good for average riders and beginners.
Optical Gear Display: The OPTICAL GEAR DISPLAY tells you which gear position is selected while riding your bike. You can see how many gears you can select either on the low side or top side, which makes shifting control easier.
SIS Rear Index Shifting System: The system constituents such as the index mechanism built in the shifting lever, the frictionless SIS rear index shifting cable and the smooth action rear derailleur realize the SHIMANO INDEX SYSTEM.