Here are some things to consider when buying a new Bearing Carrier for your ATV.

Sometimes referred to as a bearing housing, it's the piece of metal that encloses the rear axle. It's located at the back of the swingarm and inside there are bearings, seals, and a center spacer. The axle slides through all of these during removal. Why would you remove it, you ask? It's because these carriers break.

• Why do carriers break?

  Several reasons, the first being that the stock(OEM) carriers are junk. Get a good carrier after your stock one goes out. Another reason is rust equalling bearing failure.
  

• What makes a good carrier?

  Billet aluminum carriers are far superior to cast aluminum carriers. Choose a carrier from a reputable source . The best carriers offer extra features that increase their value.

• Twin-Row, Double, or Tapered? Bearings explained

  Stock carriers are a single bearing design. They use one bearing on each side of the center spacer.  Twin or Double Row carriers will use 2 bearings(or in some cases, one oversized bearing) on each side of the center spacer. Tapered bearings are a 2-piece roller bearing similar to the bearings used in trailer wheels. Much more durable than the ball bearing type used in standard carriers, tapered bearings also require proper setup and more maintenance so are not recommended for casual or inexperienced riders. Most bearings, including tapered are available online or at your local bearing supply. The part numbers are stamped on the side of the bearings.

• Bearing maintenance
  

  Since bearing maintenance is an issue, most aftermarket carriers will include a grease fitting which will allow you to keep the bearings lubricated. This is most important after riding in wet or muddy conditions that can displace grease and expose your bearings to rust. Location of this grease fitting can make all the difference in the ease of this task. Depending on the model ATV you have, you might not have a choice or it might not make any difference. Either way, get yourself a grease gun and some waterproof grease from the auto parts store or your local dealer/shop. Fill your new carrier with grease before the first ride and give it a pump every so often depending on how often you ride, or more if you end up in the muck. Keep high pressure water away from that area around the axle too.

• Frills

  Some carriers include a replacement brake caliper mounting bracket. This is a good thing and they are usually made of billet and often engraved with brand or model name to add a custom touch to your quad. Warranties are also standard on the highest quality carriers. Other considerations may be CNC versus hand machining, or brand name recognition.