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Questions and answers about sports

Fixed gear bike chain alignment

6 min read

Asked by: Joyce Grimaldi

How do you align a fixie chain?

Quote from video: Each cranks require a specific bottom bracket measurement that will give a straight chain line if you have the wrong bottom bracket for your cranks.

How tight should the chain be on a fixed gear?

It should be tight as it can be without binding. If the chain is too loose, it can fall off, which is quite dangerous on a fixed gear. Set the rear axle so that the chain pulls taut at the tightest part of the cranks’ rotation. One at a time, loosen up each of the stack bolts, and tighten it back just finger tight.

How do you line up a bike chain?

Quote from video: Line is the relationship of the sprockets to the center line of the bike. And the center line of the bike is that an imaginary line running straight through the middle of your bike.

Do you need a chain tensioner for fixed gear?

A pulley chain tensioner is necessary when the frame has vertical dropouts because they stop the wheel from moving forward and back. In consequence, one cannot control the tension of the chain without a derailleur or a chain tensioner.

Why does my bike chain slip when I pedal hard single speed?

These include worn out or misaligned derailleur pulleys, old or malfunctioning shifters throwing off the indexing in some gears, or broken/bent teeth on one or more cassette cogs. Build up of dirt and grime on drivetrain components will also cause shifting issues, including skipping chains.

How much slack should a bike chain have?

There should be approximately one half inch of movement in the chain up and down at a point half way between the front and rear sprockets. To change the tension loosen one of the axle-nuts and move the wheel forward or backward slightly and snug it up again.

How do I know if my chain is too loose?

To find out whether your chain is too long take a look at it from the side with your eyes being level with the chain. A loose chain will sag close to or below the chainstays as the chain hangs between the rear cogs and chainring. The chain might skip as you pedal, or even drop off the gears.

Are fixed gear bikes faster?

Are fixies faster than road bikes? A fixed-gear bike can be faster than a geared bike of the same size because there are fewer losses in the drivetrain (no derailleur means no chain bending and a straight chain line), and it’s lighter due to fewer components.

What happens if you stop pedaling on a fixed gear?

On a fixie if you stop pedalling the cranks will continue to spin. This means that you are essentially always pedalling on a fixed gear bike with no way to coast. On a fixie you can actually brake by preventing the pedals from moving. This locks the rear wheel in the same way the brakes on a normal bike do.

How do you align a gear shift on a bike?

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 most. 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.

How do you fix a misaligned derailleur?

Quote from video: So if you have an l-shaped allen key that's great you can insert that into the mounting bolt of your derailleur. And you can use that as a lineman gauge.

Are chain lines important?

The chainline is very important for several reasons: more efficient transmission; the less you bend the chain, the smaller the power loss; better function and less chance of the chain falling off the rings; less wear due to less friction; better function of the front derailleur; and quieter operation.

Why does my new chain slip?

Most of the time, the slipping of a new bike chain is caused by loose cables. The new shifting cables stretch a lot during the first few rides. The cables stretch way too far with time, and that’s when the problem arises, and your chain starts to slip between gears.

Why does my bike skip teeth?

Why Do Bicycle Chains Skip? When your bike chain skips between gears while you’re riding, or shifts twice instead of once when you try to change gears, the most common culprit is a loose cable. Your bike cables naturally stretch over time.

How do you fix a slipping chain?

Quote from video: Now one of the most common causes is simple derailleur adjustment on modern derailers with index shifting. The pulleys in the cage. Here should line up with the cog that the chain is on.

How do you line up a single speed chain?

Quote from video: To my chainring to the center of my chain ring and we're at let's say 50 51. And 1/2 let's say 52 millimeters. So that is my other number 52 millimeter – let's say to chain.

How do you fix a single speed bike chain?

Quote from video: If your old chain was properly sized simply lay it next to the new chain on a workbench and match the rivets side-by-side to get your length.

How do you adjust a single speed bike?

Quote from video: Hey viewers bike blogger here I'm going to show you how to tension a single speed bike. We got the chain on the wheel the rear wheel is in the frame.

What is a flip flop bike?

On a flip-flop rear wheel, there is a single cog on either side of the hub (although you only use one at any given time). One of is a fixed cog, and the other is a freewheel. The freewheel body means that the rear wheel can turn even when you’re not pedaling. In a word, it allows you to coast.

Can you pedal backwards on a fixie?

Yes, that means you can ride forward or backwards while riding fixed; However, that’s only one of the benefits that come with these bikes. Fixed gear bikes are single speed, if you think this is unfortunate, try looking at it from the angle of less is more.

Can you stop pedaling on a fixed gear bike?

The short answer is no. On the fixed gear bicycle pedals and rear wheel are directly connected, meaning when the rear wheel is spinning, pedals are spinning as well. Due to this, you cannot coast on the fixed gear bicycle and have to pedal every time the bike is moving.