When does a bicycle chain come out?

So you can tension and shorten the bicycle chain

As a moving part, the bicycle chain is an important element so that you can move forward with the bicycle while pedaling. If it doesn't work properly, you may need to tension and shorten the bike chain.

When do you have to tension a bicycle chain?

The reasons for a Slack or too tight bicycle chain are diverse. You can recognize this problem by the fact that the chain more often when you are driving slips off the pinions, pedaling is very tedious or on the bike circuit no longer works properly. You can find the cause by checking the bike chain. In these cases it probably no longer has the necessary tension and is visibly sagging. On the other hand, the bicycle chain must not be too tight. Then you have to use a lot more force to pedal.

On a bike with a Derailleur takes care of that Rear derailleur for the correct tension the bicycle chain. It is different with bikes with Hub gear. Here's one regularly Control of the chain links makes sense. The decreasing chain tension is caused by the permanent Stress on the linksthat wear out as a result. The chain is getting longer. You can solve this problem yourself by retightening the bicycle chain. How this is done and which tools you need, you will find out in the next section.

Instructions for re-tensioning the chain on the bike

If the bicycle chain does not run smoothly, you do not have to change it immediately. First you check the tension your chain. If you just have to retighten it, this can be done quickly with the right tool. You are using one Spanner, one Torque wrench and a pad so as not to damage the handles and the bicycle saddle.

We will now explain to you how you Step by step proceed with the repair.

Step 1: preparing the bike

We recommend turning the bike upside down. So you can work comfortably on the bike chain. Make sure you have a pad so that you don't damage the handles at the front and the saddle at the back.

Step 2: Loosen the fastening screws on the rear wheel

To tension the bike chain, slide the rear wheel in the dropout. Use the open-end wrench to loosen the screws on the right and left of the rear axle beforehand. It is sufficient to loosen the screws just enough until the rear wheel can be moved.

Step 3: adjusting the chain tension

The correct length of the chain can be recognized by the fact that you can lift it up and down about 1.5 to two centimeters without any effort. If this is not the case, pull the rear wheel backwards until the chain is the right length. The Retensioning the bicycle chain is quicker if you move the rear wheel straight back and turn the wheel while tensioning the chain. This is how you can reach one optimal chain tensioneven if the pinions are not evenly round.

Step 4: tightening the screws on the rear wheel

Use the torque wrench to retighten the screws at the back. It is more suitable than the open-end wrench to reassemble the nuts exactly according to the manufacturer's specifications.

Retrofit a chain tensioner with a gear hub

In the case of a derailleur, the rear derailleur has a spring. She keeps the tension on the chain. The rear derailleur also compensates for the differences in the length of the bicycle chain. This function is particularly useful when shifting between the chainrings when the chain is changing sprockets. If you don't feel like regularly tensioning the bicycle chain on your bicycle with a hub gear yourself, you can have a chain tensioner installed by a specialist dealer.

If a bicycle chain on two-wheelers with derailleur gears or hub gears despite Chain tensioner Still sags slightly, the chain tensioner is either defective or dirty. This can be remedied by cleaning the chain tensioner and the bicycle chain. If that doesn't bring any improvement, it may be Broken spring in the rear derailleur. Then you have to change the chain tensioner and replace it with a new one.

How can the bicycle chain be shortened?

It doesn't always help to just tension the chain. If it's too long, you have to Shorten the bike chain. This is an easy task with tools. Especially new bike chains in Standard size are usually longer than necessary. If she Chain length fits your bike, you can find out about the following two options.

  • Take the old chain and count the individual links from. You shorten the new chain so that there are exactly the same number of links. Do not measure the length of the chain, because depending on the wear and tear, the expansion changes over time.
  • If the old bicycle chain has already been disposed of, you can use the second variant. Put the new one Chain on the largest chainring and the largest sprocket. Do not lead them through the rear derailleur. Then pull the chain, which is neatly resting on the chainring and sprocket, taut. The chain has the optimal length when the ends of the chain overlap with two links or three rivets.

The second method is possible with many bicycles such as city bikes, trekking bikes or hardtails. This procedure is not possible on bikes with rear shock. In the next and last section we explain how you can shorten the bicycle chain step by step and which tool is best to use for it.

Instructions for shortening a bicycle chain

We'll now go through the steps to create a Shorten the bicycle chain. You will need tools and some utensils again.

  • Chain tool
  • Pliers to close the chain links
  • Chain lock and head pins
  • wire
  • oil
  • Stand for assembly

First you have to shorten the Open the bicycle chain. To do this, you use pliers to do the Unlock chain lock. It replaces the outer tabs and bolts of a normal link. Hook the gripper of the pliers to the right and left of the lock and loosely press them together. If the tension of the chain is not so high, you will have less trouble.

If your bike chain doesn't have a lock, you can use one Chain riveter to open. Place the untensioned chain in the carrier of the chain tool, which is further away from the twist grip. Now turn the handle until you feel resistance. The bolt is now in contact with the rivet pin. Continue rotating carefully until the bolt on the chain tool presses on the pin and pushes the rivet out. Remove the pen from the outer tab and discard it. To rivet the chain again later, you use new head pins. Finally, remove the chain and open it by pulling with your fingers.

In the next step you remove the excess chain links. Use the chain tool to do this. Place it on the corresponding link and screw in the bolt of the rivet until the pin in the rivet slowly slides outwards. Repeat the process until the number of Chain links removed is.

Rivet the shortened bicycle chain back together

after the Bicycle chain has been shortened, it must now be restored connected become. With a bicycle chain Chain lock you close the lock again. For a chain without a lock, put the ends of the chain together to create one with your fingers new head pin to slide into the opening. Put the handle of the chain tool back in its starting position and place the ends of the chain on the carrier. Now guide the bolt into the chain link until the rivet pin is completely seated again. You can determine the correct position by releasing the resistance briefly during insertion if the pin is properly seated. Move the chain up and down to check the position.

Before you start riding your bike again, check the once again Mobility of the newly connected chain links. You can make stiff limbs flexible again by twisting them in all directions with your fingers. With oil you can also loosen up a stiff chain link.

Always work carefully and calmlyif you want to shorten or retighten the bicycle chain. The sensitive parts in particular, such as rivets and chain links, are very sensitive. Always pay attention to the condition of an old chain. We recommend changing the bicycle chain when it is worn.