Shimano Tourney Rear Derailleur
If you are looking for a new derailleur for your 7 speed bike, Shimano Tourney is one of the best ones you can get for reliable shifting. Shimano Tourney has you entering into the line of top quality Shimano drivetrain components. When you buy Shimano brand components, you know you are getting a quality product from one of the top bicycle component brands on the market. The Shimano Tourney rear derailleur has some great features built in to help make sure you have the best shifting available. Featuring Shimano’s Hyper Glide technology, Double Servo design, and SIS, this derailleur offers some of Shimano’s best features on a derailleur. But what do these features mean?
Features of the Tourney Derailleur
As stated above, the Tourney Rear Derailleur features some great features from Shimano, like HyperGlide, Double Servo, and SIS. But what do these features mean and why are they important? Don’t worry, we have all the information! Double Servo technology on this derailleur refers to the design of the pulley arm and how it actuates. This Double Servo design helps make sure that as the derailleur moves up the rear bike cassette, the jockey wheel keeps a good distance from the cassette teeth while the bike chain runs through it. If the jockey wheel gets too close to the cassette teeth, the chain can be stuck in place, preventing the bike from moving. In addition to the Double Servo design, the Tourney rear derailleur also has their HyperGlide technology, which helps make your shifting more efficient. This HyperGlide technology is something Shimano puts on all of their products, from derailleurs, to cassettes and front sprockets/cranks. This HyperGlide technology has the teeth on the cassettes, chainrings, and jockey wheels designed to engage faster and more efficiently when you shift gears on your bike. On a component without Shimano’s HyperGlide, the cog has almost a whole rotation before the chain engages after shifting gears. With HyperGlide, the chain can engage in about a fifth of a rotation, making it so you can shift and get to delivering power to your bike even quicker. After all, who doesn’t want to make their bike shift more efficiently? Finally, this derailleur utilizes SIS, which stands for Shimano Index System. Shimano Index System really has three parts that work together, with the Tourney derailleur being a part of the system, with the other parts being the Shimano Shifter, and the cassette and chainrings. The Shimano Index System is the indexed spacing when you shift gears. What does that mean though? When bikes were first introduced with shifting, there was no “click shifting”. These bikes used what are called “friction shifters”. What these friction shifters did was just continuously pull cables as you actuated them. The rider would have to monitor where the chain would go, as there was no individual click or position letting you know what gear it was in. Finally, in the 80’s, a Japanese company Shimano came along and invented a style of shifters that you would simply click and the bike would shift into the proper gear automatically. This quickly took the world by storm and became the preferred style of shifter on most bikes you buy nowadays. This is what became the Shimano Index System. When you use a Shimano drivetrain, all of the components are designed to have the same Shimano indexing pull ratio, so you can use different SIS components and they will work with each other.
Tech Specs for Tourney Rear Derailleur
- Maximum Tooth Count for Biggest Cassette Ring of 34T
- Minimum Tooth Count for Biggest Cassette Ring of 28T
- Maximum Tooth Count for Smallest Cassette Ring of 14T
- Minimum Tooth Count for Smallest Cassette Ring of 11T
- Jockey Wheel both have 13T
- High and Low Limit Screws
- 7 Speeds
- SGS Long Cage Derailleur Arm
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