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What are Mud Flaps?

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  • Written By: Michael Pollick
  • Edited By: Lindsay D.
  • Last Modified Date: 30 September 2016
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Mud flaps are rubber mats attached directly behind the wheels of cars and trucks. Their main function is to shield other cars from mud and other debris flung out by tires. Quite often in off-road or rainy conditions, car and truck tires are partially submerged and centrifugal force will send mud and debris towards the back of the vehicle. Although they are officially called mud flaps, these rubber mats also deflect loose gravel and excessive rainwater.

Passenger vehicles do not always include mud flaps as standard accessories, but almost all commercial trucks use them as safety features on the road. Trucks hauling loose materials such as gravel must take precautions against accidents caused by flying debris. The use of these protective flaps on commercial vehicles may even be mandated in some areas.

As with many other after-market vehicle accessories, mud flaps have become popular means of self-expression. Automotive supply stores carry a wide variety that feature cartoon characters, familiar logos and short sentiments similar to bumper stickers. Some companies actually commission custom ones that feature their name and contact information. Their installation is usually not difficult, but it can be very messy and awkward. A few bolts or screws hold the top of the mud flap to the frame and the bottom edge remains unattached.

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Mud flaps perform a useful service, but they are by no means a requirement for safe driving. Car owners may discover that these flaps help to keep the undercarriage of the vehicle cleaner by rerouting sprays of muddy water. Small objects on the highway may be kicked up by the tires, but the flaps prevent further damage. Many drivers who do not use them may discover a distinctive pattern of splattered mud behind each wheel well. Small nicks and scratches caused by flying debris may also be prevented.

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pollick
Post 2

I don't know if the US would ever make mud flaps mandatory, but it makes much more sense to have them than not have them. I think of how one piece of debris hitting a windshield at highway speeds could trigger a serious chain reaction kind of accident. Personally, I've had more problems with gravel and other debris falling out of the back of dump trucks at high speeds, but at least most of those trucks have mud flaps.

anon321293
Post 1

In the Province of British Columbia, it is a requirement of our motor vehicle act to have mud flaps on vehicles. Unfortunately, not all vehicles have mudflaps, flying road debris is a big issue in our part of the world. There have actually been a couple of deaths in the last year resulting from rocks penetrating windshields.

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