What are the two types of shifters?

Drop-Bar Shifters Integrated levers are shifters and brake levers combined into one mechanism. ... The other two types of shifters which are commonly found on bikes with drop-bars are “stem shifters” and “down-tube” shifters. More items... •

communitycyclingcenter.org - Shop tip: types of shifters - Community Cycling Center

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Shop tip: types of shifters

By Gwen Koon, Service Manager

This series of shop tips over the past several months was all about creating a basis for more in-depth knowledge. Whether you’re working on a bike you already own or preparing to buy a new one, it’s very helpful to be familiar with all the different types of components. Knowing their names, their uses and their limitations can help you be prepared to ask the right questions and make well-informed decisions. In our previous shop tip, Gwen provided an overview of derailleurs. In this tip, she will describe the two types of shifters.

Shifters

There are two broad categories into which almost all brake levers fall: those which are designed for use with drop handle bars, and those which are designed for flat handlebars. (Both are pictured below.)

Drop-Bar Shifters

Integrated levers are shifters and brake levers combined into one mechanism. If you pull the lever towards the bar, it actuates the brake. If you push the lever or paddle to the side, it actuates the derailleur. Integrated shifters are always “indexed” and were made for 7-speed through 11-speed systems. There is an image of an integrated lever in a previous shop tip: brakes and levers. The other two types of shifters which are commonly found on bikes with drop-bars are “stem shifters” and “down-tube” shifters. Both types function and look much the same, but mount to different parts of the bike. They are located in the upper left half of the photo. Stem shifters attach to the stem, which is the piece connecting the handlebars to the rest of the bike. Down-tube shifters either have a clamp which wraps around the bicycle frame, or bolts which fit into threaded tubes that the manufacturer has placed on the frame. Stem and down-tube shifters can be either indexed or friction- and some models can even switch between the two. Most models were made to work with 5-speed through 8-speed systems. Bar-end shifters (pictured below) are, again, very similar to down-tube shifters, and are sometimes even interchangeable, given the right hardware. Bar-end shifters have a special mount which slides into the open ends of drop-bars and when tightened down, holds them securely in place. These shifters can be either indexed or friction and were made for 3-speed through 11-speed systems.

Flat-Bar Shifters

Trigger shifters come in a variety of shapes and sizes, but all use a small spring to rebound their lever after the rider compresses it to shift. Some have two levers, some only have one- the trigger shifters in the photo are at the very bottom. All trigger shifters are indexed. Thumb-shifters are a diverse type of shifters. Some are indexed, some are friction, and they are available for everything from 5-speed to 11-speed systems. Grip shifters use rotational force, rather than a pushing motion. Grip shifters fit around handlebars and are held in place by a small bolt. They are always indexed and were made for 5-speed through 10-speed systems. Stay tuned for our next shop tip: how to adjust a front derailleur.

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Is it OK to skip gears when shifting?

As our friend Jason Fenske from Engineering Explained notes, skipping one or two gears on upshifts is relatively safe. You'll just want to let the clutch out more slowly than you would normally, to make sure the engine and transmission speeds are matched, otherwise, the car might judder.

roadandtrack.com - Skip Gears Manual Transmission - Is it OK to Skip Gears In a Manual Car?

In a manual-transmission car, you can save yourself some effort and skip gears on up- and downshifts, but there's a right and a wrong way to do it. If you're not careful, you run the risk of blowing up your engine. But don't let that discourage you. It's really not that tricky. As our friend Jason Fenske from Engineering Explained notes, skipping one or two gears on upshifts is relatively safe. You'll just want to let the clutch out more slowly than you would normally, to make sure the engine and transmission speeds are matched, otherwise, the car might judder. You'll want to match the engine and transmissions speeds on downshifts too. Just like a regular single-gear downshift, that requires rev-matching, but you'll need to give the car more throttle depending on which gear you're shifting to. With skipping gears on downshifting, don't shift down to a gear that'll cause your engine to exceed its redline. That can potentially require a very expensive fix. A simple rule of thumb is to skip no more than two gears at a time. This content is imported from YouTube. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

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