Chloe Zhang
The plastic disk behind a cassette on a bicycle, also known as a spoke guard, dork disk, or dork disc, is used to prevent the chain from getting between the spokes and cassette and causing damage. While some cyclists believe that the disk is unnecessary and uncool, others argue that it is a cheap and lightweight safety measure that can prevent costly repairs.
| Characteristics | Values |
|---|---|
| Common Names | Spoke Guard, Dork Disk, Pie Plate, Nerd Coaster, Minneapolis Frisbee, 45rpm Single, Idiot Puck, Moron Shingle |
| Purpose | To prevent the chain from getting between the spokes and the cassette, which can cause damage if you shift too far |
| Weight | Nearly weightless |
| Colour | Clear, plastic ones will yellow with age |
| Cost | Not expensive |
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What You'll Learn
The plastic disk is a spoke guard
The plastic disk behind a cassette is a spoke guard. It is also known as a dork disk or a spoke protector. Its purpose is to prevent the chain from getting between the spokes and the cassette, which can cause damage if you shift too far. This can only happen on badly tuned gears or old friction-shifted shifters. The spoke guard also helps to keep chain oil off the brake disc.
The plastic disk is considered by some to be unnecessary and uncool, and that it should be removed right after purchasing the bike. However, others argue that it is a cheap and useful safety feature that can prevent a lot of damage. It is also argued that it can increase the aerodynamics of the rear wheel.
The plastic disk can be purchased inexpensively and is easy to install. It is available for a range of bicycles, including mountain and road bikes. Some users have reported that the disk can deform and start rubbing against the derailleur. It is also recommended that the disk be replaced when it becomes brittle and breaks into small pieces.
The decision to keep or remove the plastic disk behind a cassette is ultimately a personal preference. While some consider it a useful safety feature, others believe it is unnecessary and detracts from the aesthetics of the bicycle.
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It prevents the chain from going into the spokes
The plastic disc behind the cassette on a bicycle is called a spoke guard or a "dork disk/disc". Its purpose is to prevent the chain from going into the spokes, which can cause damage or an accident. If the chain falls off the top ring and into the spokes, the spoke guard prevents the chain from getting jammed and causing damage to the wheel or the bike, or even injuring the rider.
While some cyclists view the plastic disc as unnecessary and unattractive, others see it as a useful safety feature. Some cyclists believe that with proper maintenance and attention to the bike, the spoke guard is not needed. However, accidents can happen, and the spoke guard provides an extra layer of protection. It is a lightweight and inexpensive way to prevent potential issues.
There are mixed opinions among cyclists regarding the plastic disc. Some consider it an eyesore and believe that removing it gives the bicycle a more professional appearance. They may also associate it with inexperienced riders, referring to it as a "dork disk". In contrast, other cyclists recognise its practical value, especially for self-built bikes or when adjusting the bike's settings.
The plastic disc is not an essential component, and some riders may choose to remove it without issue. However, it can provide peace of mind and protect against potential damage or accidents, especially if the bicycle is not perfectly tuned or maintained. Ultimately, the decision to keep or remove the plastic disc depends on personal preference and the rider's level of comfort with the potential risks involved.
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It's also called a 'dork disk'
The plastic disk behind a cassette on a bicycle is also called a "dork disk". This colloquial term indicates how a lot of bikers view them. Many cyclists consider the disk unnecessary and uncool, and some even suggest that it should be removed to look more professional.
The disk is a spoke guard that prevents the chain from getting between the spokes and the cassette, which can cause damage if you shift too far. This can only happen on badly tuned gears or old friction-shifted shifters. Accidents can happen, and the spoke guard acts as a safety net in case the chain jumps off the top ring and into the spokes. This can be the difference between being annoyed and being thrown off the bike.
Some cyclists, referred to as "non-dork cyclists", choose to leave the disk in place or even buy them for self-built wheels. They recognize its potential to prevent a lot of damage at a low cost. However, others argue that if you treat your bike well and make adjustments on a repair stand, the disk is unnecessary.
The plastic disk can also help keep chain oil off the brake disc. Over time, the disk may deform and start rubbing against the derailleur, and it can become brittle and break off. While some consider it an eyesore, others appreciate its aesthetic, especially on vintage bikes where it complements the other chromed parts.
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$4.75 $6.49
It's unnecessary if your bike is well-maintained
The plastic disk behind the cassette on a bicycle, also known as a spoke guard or 'dork disk', is considered unnecessary by some cyclists if the bike is well-maintained. This component is designed to prevent the chain from falling into the spokes and causing damage or injury. However, it is believed by some that a well-maintained bike with properly adjusted gears and limit screws will not require this safeguard.
The plastic disk is often viewed as an eyesore, leading some cyclists to remove it for aesthetic reasons. Some cyclists also believe that the disk can cause more harm than good, as it may deform and rub against the derailleur or get lodged between the gears and spokes.
While some cyclists choose to remove the disk, others recognise its potential value as a safety net. It can provide protection against chain derailment, particularly on vintage bikes or those with old friction shifters. Additionally, the disk can help keep chain oil off the brake disc, preventing oil contamination.
The decision to keep or remove the plastic disk depends on individual preferences and the specific characteristics of the bicycle. Cyclists who are confident in their bike's maintenance and adjustment may opt to remove it, while those seeking additional safety measures may choose to retain or install one. Ultimately, the plastic disk can offer peace of mind, especially for new bike owners or those performing adjustments themselves.
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It's considered unfashionable by some
The plastic disk behind a cassette on a bicycle, also known as a spoke guard or a dork disk, is considered unfashionable by some. The colloquial term "dork disk" indicates how many bikers view them. Some cyclists believe that the disk is unnecessary and should be removed to look more professional and fashionable. They consider it an ugly "chunk of plastic" that should be broken and removed after purchasing the bike.
However, others argue that the disk serves an essential purpose. It acts as a safety net, preventing the chain from falling off the top ring and getting stuck between the spokes and the cassette, which can cause damage or even result in accidents. This issue is more common on old friction-shifted shifters or poorly tuned gears. While some experienced riders may not have encountered this problem, less experienced riders or those with less well-maintained bikes may benefit from the protection offered by the disk.
The disk is also useful for keeping chain oil off the brake disc and preventing damage to the wheel. Although some consider it an eyesore, the disk can be left on the bike until the rider becomes more familiar with its mechanics. Ultimately, the decision to remove the disk depends on the rider's preference for style versus substance, as well as their level of confidence in their bike maintenance skills and riding experience.
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Frequently asked questions
The plastic disk behind the cassette on a bicycle is called a spoke guard or a dork disk. Its purpose is to prevent the chain from getting between the spokes and the cassette and causing damage.
The necessity of the plastic disk is a topic of debate among cyclists. Some believe that it is unnecessary if the bike is well-maintained and the rider is skilled in maintenance. Others argue that it provides a layer of protection against potential damage, even if it may not be aesthetically pleasing.
Removing the plastic disk is a matter of personal preference. Some cyclists believe that removing it makes the bike look more professional and stylish. However, others argue that it can increase the risk of the chain falling off or getting stuck in the spokes, potentially causing damage to the bike and the rider.
The plastic disk behind the cassette has various nicknames, including "dork disk," "pie plate," "nerd coaster," "Minneapolis frisbee," "45rpm single," "idiot puck," and "moron shingle."
Yes, replacement plastic disks are available for purchase. They are typically inexpensive and can provide peace of mind by offering protection against potential damage caused by the chain.
