What is wheel hub?

How Are Wheel Hub Sizes Measured?

The WHEEL HUB is the support structure for your car’s wheels. Its bearings are caged ball bearings or roller bearings. These moving parts are packed with grease and move against inner and outer races. Earlier model vehicles had a single hub bearing. However, some newer models have just a single wide hub-bearing. If you’re experiencing wobbly wheels, it might be time to replace the wheel hub.

The flange diameter of the hub

is important in selecting the correct spokes for your bike. This measurement is called the ‘pitch circle diameter’ and is the distance between the centers of the opposite spoke holes. On a cross-laced wheel, the hub flange diameter won’t affect the length of the spokes. However, in radial lacing, this measurement becomes extremely important. This is why you should check the radial lacing before buying a hub.

The WL and WR of your hub

are the center-to-center distance of the hub. The flange to flange offset (F.T.F.) is the distance between the two rim splines. On perfectly symmetrical hubs, the WL and WR will be equal. The FE are the two dimensions of the spoke holes. If you’re unsure, it’s best to ask a wheel mechanic about the measurements.

The WL and WR can be calculated

by comparing the overall width of the hub to the flanges and locking nuts. The flange to flange offset should be zero for symmetrical hubs. If you need to measure your spokes, it’s important to get an exact measurement on both the center and flange. The WR and FE measurements can’t be determined online. Instead, you’ll need to make your measurement.

The WL and WR measure

the center of the hub to the center of the flange. The flange’s diameter will determine how much the wheel weighs. If it’s too heavy or too light, it’s important to buy a radial hub. It will increase the weight of the wheels. In addition, the flange diameter can make a wheel flex. Those two measurements are crucial when determining the proper radial laced wheel.

The WL is the width of the hub.

The WR measures the outer diameter of the hub. The F.T.F is the distance between the two flanges. The WL and WR must match. If the spokes are too wide, they will not fit properly in the hub. The F.T.F. value is a key metric for the WHEEL HUB. For the wheel to be true, the spokes must be centered.

A wheel’s center bore

is the area where the wheel is centered on the hub. Its diameter is the diameter of the hole that the nut is seated in. The wheel’s lug nuts are the flanges on the wheel. The center-bore allows the wheel to rotate smoothly. Depending on the brand and model of your car, you may need to purchase a different type of hub-centric ring. This type of ring is designed to hold the wheels in place.

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