How to Use 21 Speeds on a Bike
Common gearing on bikes include 10, 18 and 21 speeds. The number of gears a bike has is figured by multiplying the number of front chainrings by the number of gears in the rear cassette. For example, a speed bike has a triple chainring in the front and seven rear cassette gears. Once you learn to master the gearing of a speed bike, you'll be able to enjoy longer rides that leave you less tired. Jan 25, · As for the outer limit screws on the derailleur, the proper way to adjust them is to disconnect the cable and allow the derailleur to float back and forth without being restricted by the cable. You would use your hand to through the derailleur from one extreme to the other making adjustments with a screw driver.
How to adjust the gears on a 21 speed bike Updated: June 2, References Approved. This article was egars by Hod Cox. This article has been viewedtimes. If your bike is having a hard time shifting, staying in gear, or the chain is falling off, you will need to adjust your gears.
Derailleurs are devices that bkie you to change gears, pushing and pulling addjust chain onto different gears every time egars shift. While they may looking grars, adjusting your bike gears is not difficult if you have patience and a few tricks up your sleeve.
To adjust bike gears, start by turning your bike upside down and resting it on the seat and handlebars. Then, shift your bike ajust the gear that you're having problems with. If fears problem with your bike is bbike the chain won't shift down when adjhst lower your gears, how to write a legal memorandum to a judge the cable adjuster clockwise to loosen it.
If you're having the opposite problem and your bike won't shift up when you go up a gear, tighten the cable adjuster by turning it counter clockwise. To learn how to fix a slipping or limited chain, scroll down! Did this summary help you? Yes No. Log in Social login does not work in incognito and private browsers.
You need to be able to spin the wheels freely without the bike moving. The best way to do this is with a bike stand. If you don't have one, check if your local bike shop or outdoor store has a "maintenance night," where you pay a small fee to access to all of their tools for the night. You can also turn the bike upside down, resting it on the seat and handlebars. Aduust you do, however, know that you will have to reverse the direction you spin things in the following instructions.
You can also hang the nose of your saddle in the notch of a tree or low hanging joist. Locate your derailleurs. Derailleurs are the machines that physically shift your gears and keep your chain in place. There is one on the back wheel attached to the cassette the collection of gears and another smaller derailleur near the pedals. The rear derailleur is the more complex machine, consisting of ot derailleur, an arm, and kn gears that the chain is threaded through.
A cable pulls this arm back and forth, allowing the chain to switch gears. The front derailleur is clamped onto your bike's frame, and consists of a spring and two "derailleur plates," yow small metal walls that force the chain to stay on only one gear at a time.
Diagnose your shifting problems by testing each gear. Using one hand to lightly pedal the bike, shift through 1 gear per click, starting with every gear on the back derailleur. Go up every gear once and down every gear once.
Note places where the gears have trouble shifting, where the chain slips off the gear, or where you need to shift twice to make the bike shift. For example, if I am testing the back derailleur and I have 3 gears in the front, leave the front derailleur in the middle ring the entire time.
This prevents the chain from stretching. Find the cable adjusters. Follow the cables leading to the derailleurs to find the adjusters, which geears like little nuts or barrels surrounding the cables. There may be two how to have longer stamina in bed each cable -- one at what is the rmd percentage for an ira derailleur end and another by the handlebars.
These make small adjustments to the derailleur cables, allowing you to make subtle changes to your shifting. Shift to your bie gear. Stop shifting when you find an issue, but keep your bike in that gear.
Loosen your cable adjuster if the chain won't shift down. If you have trouble shifting as you lower your gears lower gears are closer to the wheelthen loosen the cable adjuster by ggears it counterclockwise. Turn the adjuster slowly, turning until the chain falls into the correct gear. Always work slowly, adjusting by a quarter-turn at a time at adjuxt.
Think of it as of turning the adjuster the way you want the chain to move. Rotate towards the bike to make the chain move towards the bike. If you need to make a large adjustment, thread the adjust into derailleur, shift into the smallest gear, loosen the pinch bolt, and pull gear cable by hand. Tighten your cable adjuster if your chain won't shift "up. When it is correct, the what temperature does water boil with salt will naturally switch to the correct gear on its own.
Think of this as turning the adjuster howw way you want the chain to move. Rotate away from how to adjust the gears on a 21 speed bike bike to make the chain move away from the bike. Return to your low gear and shift back all the way up uow down.
Once you've successfully adjusted the problems, cycle through every gear again to make sure that the derailleur can successfully shift through every gear. You want the chain to flow smoothly from gear to gear every time you shift. Take short practice ride to spot any other problems. Sometimes the bike will behave differently under your weight.
In a parking lot or driveway, ride the bike around and cycle through any gears. Note any problems and adjust your cables accordingly. Method 2 of If hwo do, however, know that you will have to reverse all of the following instructions.
Shift to your lowest gear. On the rear derailleur, this is the small gear furthest from the bike. Too the front derailleur, it is the small gear closest to the bike. Shift the derailleur you are not working on to a gear somewhere in the middle. Unscrew the bolt holding the cable in place. This is found at the end of the cable leading from your handlebars to your derailleur.
A small bolt clamps the cable in place, holding it tight. Using an Allen key, unscrew the bolt to free the end of the cable. Advanced Note: You'll notice that, if you pedal the bike, the chain will slide down to the lowest ring without your help. That is because derailleurs work bikw tightening the cable to hold the chain in place. Similarly, you can shift your bike manually by pulling the adkust.
Locate your derailleur's "limit screws. There are two small screws which hold the derailleur in place, located right next to each other on the top front derailleur thhe back rear derailleur of the derailleur. The screw on the left, often labeled with an "H," which limits how high the chain can go and affects the outer gears. The screw on right, often labeled with an "L," limits how low the chain can go and affects the inner gears.
Tighten the screws to keep the chain from falling off. If your chain is falling gear near the outer gears of the front derailleur, then tighten the H screw to limit it. When the chain falls off closer to your wheel, then tighten the L screw. Using your hand, push the rear derailleur to the inside of the bike as far as you can. If the derailleur pushes too far the chain will fall off the gears and towards the wheel.
Alternatively, it may not push far enough, and the chain will not get to all the gears. You can then adjust the limit screws to move the derailleur -- and you will actually see it moving. Tighten the low limit screw if you the what are the vertices of a pyramid goes too far.
This will keep the derailleur from moving too much to the left. Loosen the low limit screw if you cannot shift into every gear. This will allow the derailleur to move farther in. Adjust the front derailleur so that the derailleur plates sit on either side of the chain.
Adjusting the rear derailleur
While you’re in the smallest front gear you can shift the rear gears between 1 and 3 for a finer range adjustment, but you should always shift the front back to 2, or the middle chainring before using gears on the rear. Jun 19, · Learn how to properly adjust the rear shifting on your bike for better performance! The bike I use for the demonstration is a Trek Madone equipped with a Sh.
Should I try to un bend and adjust? Or just buy a new one?? And could some one explain the proper way to adjust gears?? I have never been taught the proper way to do it. Thanks again.. Received 9 Votes on 8 Posts. Hey, Did you ever resolve this? I know it's been a while since you posted, and I hope you worked it all out. View Public Profile. Find all posts by CycleZen. Snapper, Adjusting the rear derailleur of a bicycle can be a mystery to say the least, and there are many variables that come into play.
There are specialized tools to check the alignment of and to realign the rear hanger tab. However, and experienced mechanic can use an adjustable wrench and a good eye to bring things back to an acceptable tolerance. As for a bent derailleur, if it is not damaged it could be bent back simple by grasping it firmly and pulling it back into alignment.
I have no way of telling what type of derailleur you have and whether or not your derailleur is connected to your bicycle via a hanger tab or directly to the rear drop out, but either way proper alignment of the derailleur with the center line of the drive train is critical in order to properly adjust the rear gear shifter Derailleur. Normally, when the derailleur needs adjustment it is not actually the derailleur that is the culprit. The outer limit screws once adjusted properly should remain in their fixed positions indefinitely.
It is a combination of the outer cable casing that has compressed and the inner cable stretching. I can go on and on about cables, but all you need to do in most cases is to turn the cable adjustment barrel on the rear derailleur a half turn counter clockwise as you are looking at it from the rear and go for a test ride.
If the shifting seems to be better or not as bad then you are on the right track. If it got worst, then turn back the other way. Trial and error will usually get you dialed in.
Normally this would be done while the bicycle is secured in a stand as you turn the cranks by hand. Just remember that cable tension is usually the culprit, but not always.
There is also a cable tension barrel at the gearshift mechanism on the handlebars. It will do the same exact thing except at a different location. Also keep in mind that all derailleurs are not created equal and the lower priced models, although shifted fine when new will soon come out of alignment and not stay in adjustment if ridden beyond casual riding. As for the outer limit screws on the derailleur, the proper way to adjust them is to disconnect the cable and allow the derailleur to float back and forth without being restricted by the cable.
You would use your hand to through the derailleur from one extreme to the other making adjustments with a screw driver. I would do you an injustice to explain the entire process from soup to nuts. There are many good books that describe the process with clear pictures.
I suggest you look into them. Hope I was a little help to you, and not confused things anymore then you where. Regards, Woodrow.
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