The first step to changing your sprocket is to remove the old one and make sure that you’ve got a few things with you. You should also have some WD-40 or similar lubricant handy for this job, because it’s going to be tough otherwise. After taking those two steps, grab yourself a rubber mallet and start tapping the new rotor into place.

Replacing the rear sprocket on a BMX bike is a simple process that can be done by anyone. It’s important to note, however, that it’s not recommended for those who don’t know what they’re doing.

How do you replace a sprocket on a BMX bike? |


What sprocket size is optimum for BMX in this regard?

48T (teeth) sprockets were once standard on BMX bikes, but this is no longer the case. Today’s most popular sprocket sizes are 25T or 28T with a bore of 23,7mm. Bolt drive and spline drive are the two most common kinds of sprockets. The bolt secures the bolt drive sprocket to the crank arm.

Is a larger sprocket, on the other hand, faster? Size of sprockets and final drive Gearing up increases speed while lowering the final drive ratio. Use a bigger rear sprocket or a smaller front sprocket to gear down. Use a tiny countershaft/front sprocket or a big rear sprocket for greater bottom end and better acceleration.

What good does a smaller sprocket do in BMX?

A U-style rear brake positioned to the top of the frame chain stay is common on BMX bikes. A extremely tiny sprocket and rear gear will drop the chain to the point where it strikes the top of the brake and prevents pedaling with this form of brake attachment.

Which BMX gear ratio is the best?

Over the years, classic BMX gearing has developed to be 44/16, which has 55 gear inches. The most common gear ratios are all about 55 inches, which appears to be the most comfortable for most individuals.

Answers to Related Questions

What effect do sprockets have on speed?

Simply explained, your gearing ratio is the number of teeth between the front and rear sprockets. This ratio influences how the bike converts engine RPM to wheel speed. Changing the front or rear sprocket sizes will alter this ratio, and hence the way your bike transmits power to the ground.

Is there a bike chain at Walmart? has Bell Links 500 Bicycle Chain for 10-24 Speed Bikes, 1/2 inch x 3/32 inch 112 links.

Which BMX freewheel is the best?

Overviews of the top five single-speed freewheels in 2019.

  1. Fixie Bike Single Speed Shimano Adaptor Conversion Kit by Cycling Deal.
  2. Single-speed freewheels from SHIMANO.
  3. Shimano SF-MX30 DX Single Freewheel 16T x 3/32′′ Single Chrome Shimano SF-MX30 DX Single Freewheel 16T x 3/32′′ Single Chrome Shimano SF-MX30
  4. Single Speed 12T 14T 16T and 3 Speed SENQI Bike Freewheel Sprocket Gear

What kind of gear does a bicycle have?

The gear ratio of a shaft-driven bicycle is determined by the bevel gears employed at either end of the shaft. Using a lower gear (greater mechanical advantage) allows a bicycle to move at the same speed while requiring the user to pedal at a quicker cadence yet with less power.

Why do BMX bikes have such a narrow wheelbase?

According to Google, the larger the leap, the smaller the bike. Typically, the bikes feature 20-inch rim wheels and just one gear. Olympic BMX cycling is a sport that combines racing with jumps, thus riders need a light bike that can move quickly and handle the shock of landing after leaps several times.

How do I know what sprocket size I require?

The number of teeth of a sprocket, also known as a “chainwheel,” is the unit of measurement. Divide the rear sprocket size, say 49 teeth, by the front or countershaft sprocket size, say 13 teeth, to get the final driving ratio (like a new Yamaha YZ250F).

What is the appropriate age for a 20-inch BMX bike?

Dirt jump and freestyle BMX bikes range in size from 16″ to 20″ depending on the rider’s age and size.

What is the number of gears on a BMX bike?

Instead of the 44/16 gearing found on virtually all previous BMX cycles, contemporary bikes feature 36/13, 33/12, 30/11, 28/10, 25/9, 23/8, and even 22/8 gearing, all of which have almost 2.8:1 gear ratios. Smaller gearing hubs provide the advantages of being lighter and having greater clearance for grinding.

What is BMX rollout, exactly?

The first number refers to your front sprocket/chainring, the second to your rear cog/freewheel, and the third to the rollout. Take note of how similar they are. They’re all crammed inside that 55.

What is the top speed of BMX racers?

The riders down the ramp in two seconds at a speed of around 35 mph (15.6 m/s), according to one assertion regarding Olympic BMX.

For my BMX bike, what chain size do I need?

Sizing of BMX chains

The usual 1/8″ width is used on the majority of BMX chains, including regular and half-link. For weight-shaving races, narrower 3/32″ chains are available, as are more heavy-duty 3/16″ chains, but most riders will be OK with the normal.

What is micro gearing, and how does it work?

Micro drive is a form of bicycle drivetrain that employs sprockets that are smaller than regular. It is typically used on BMX and MTB bikes. The stress in the Chain rises as the front and rear sprockets get smaller, making stretching and breaking more likely.

What is the purpose of a larger chainring?

The size of a chainring (typically stated in terms of the number of teeth on it, such as a 53t ring) has a direct impact on the gearing of your bike, with larger rings indicating a higher (harder to push) gear and smaller rings indicating a lower (easier to push) gear.

What is the formula for calculating sprocket speed?

To determine sprocket ratio, count the teeth on both the driving and driven sprockets and divide the first by the second. For every rotation of the driving sprocket, this ratio informs you how many times the driven sprocket spins.

When you’re riding your bike, which moves faster: the bike’s chain or the ground underneath it?

Because of the sprocket to wheel ratio, the chain will seem to be going slower than the ground to a cyclist. The links on the top of the chain move faster than the bike in relation to the ground, while the links on the bottom of the chain move slower. There’s no need to make things so difficult!

To remove the rear sprocket from a BMX bike, you will need to use a tool that has a thin blade on one side and a ratchet on the other. The device should be used with care as it can cause serious injury if not handled properly. Reference: bmx rear sprocket removal tool.