If you have been hearing a humming noise coming from the tire area while driving down the road (particularly if this humming noise gets louder as your speed increases), it probably means that you have a bearing and hub problem. The best way to fix this issue is to purchase and install a new Replacement Hub Assembly. While it is possible it's just the bearings and you can simply replace those, it isn't always a good idea to do so. Many times, when you go to replace the bearings, you will find that the hub is too worn and needs replacement anyway. If it isn't, it likely will be soon, so it is often much easier and safer to go ahead and install a complete Replacement Hub Assembly and not have to worry about it for a long time. Another thing to keep in mind is that many cars, especially newer models, are supplied with integrated hub assemblies, so it won't be possible to replace part of it without replacing the entire assembly. Whatever type of vehicle you own, we have a Replacement Hub Assembly that will fit perfectly according to your make and model, and will allow you to drive with ease of mind from now on. Gearheads should always get great sales support when they buy quality parts for their car or truck. That's why we run an always-open information and support bureau to answer all your calls. To make a good deal even better, all parts come with totally free shipping for every order more than $50. If you can find a better price, give us a call - we will meet or beat any legitimate auto part price.