Wheel Hub

Wheel Hub

How to Take off a bike wheel ?

Before you can remove a wheel, you need to loosen the brakes. Brakes are designed to grip the rims, which are narrower than the tires, so their position prevents the wheel from being removed.

Most brakes are designed with a mechanism to allow for a quick release of the cable that holds the brake adjustment in place. The way in which you'll detach the cable may vary depending on what type of brakes your bike has. On some brakes, such as cantilevers, you pull the end of the cable out of the brake arm.

In most cases, you need to pinch the brakes together to create slack in the cable, enabling you to lift the end of the cable out of the brake arm. After you remove the cable and release the brakes, the brakes will spring open. Here's how to do this for the two main types of brakes:

• If you have V brakes, you'll need to pull back on the rubber boot of an L-shaped piece to expose the cable. Pull the cable out of the narrow slot in the cable holder and release it to open the brakes.
• If you have side-pull brakes, there will be a small lever on the brake where the cable is attached. Move the lever to the open position and the brakes will spread apart. In some cases, there may be a button instead of a lever; if you have a button, push it to release the tension on the brakes.

Some bikes have the quick-release mechanism built into the brake lever. If you can't find it on the brakes, look here.

If you can't figure out how to release the brakes, you can always let the air out of the tires. Sometimes this will provide enough clearance between the brakes to remove the tires.

After you've released the brakes, follow these steps to remove the front wheel (start with the front wheel — it's the easier of the two):

• If your wheel uses hub nuts or bolts, use a wrench to loosen the axle. Start with one nut, loosen it slightly, and move to the other nut, switching back and forth until you can free the wheel.Avoid loosening one side all at once because this could lead to problems with the bike's hub bearings. Alternatively, if you have two wrenches, you can undo both nuts at the same time.
• In place of bolts, many bikes these days are manufactured with a quick release which are loosened by opening the lever on the side of the wheel hub. If your wheel has a quick release, open the lever. When you release the lever the axle may loosen enough to remove the front wheel. If it doesn't, hold the nut opposite the lever with one hand and rotate the lever a few times to loosen it. Modern bikes are designed with a safety retention device built into the dropout which holds the wheel in place even when the quick-release lever is loosened. There are many different designs, so inspect yours and/or refer to your owner's manual. In order to release the wheel, you have to lift and maneuver the wheel off the dropouts of the frame.

Unlike the front wheel, which drops off as soon as the axle is loosened, the rear wheel requires another step or two to remove it because of the chain and derailleur being attached to it. Here's how to remove the rear wheel:

1. Shift to the smallest cog on the rear, making the chain more slack.
2. Loosen the nuts or the quick release for the rear wheel in the same manner as you did for the front.
3. To remove the wheel, you may have to give it a slight blow to knock it loose from the frame.
4. When it comes loose, move the wheel away from the derailleur (forward and down) to let the chain fall off.

Don't be afraid of the rear wheel. The chain and rear derailleur stay on the bicycle and, by removing the rear wheel, you won't effect any of the gear adjustments. In some cases, you may have to use your hand to lift the chain off the cogs or pull back the derailleur from the wheel in order to slack the chain from the cogs.

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Will pairing two 36v electric wheel hub bikes together = 72v to go uphill?

If I pair two 36v electric wheel hub bikes together, with a frame of some sort, (a quad bike) will I get the equivalent of 72v to go uphill? These hills require 72v for electric bikes. Or will it be just two 36v bikes coming to a stop 1/4 the way up the hill? Is it like two batteries in parallel, or two batteries in Series??? Anybody?

http://www.zbattery.com/Connecting-Batteries-in-Series-or-Parallel
72v will melt your 36v motor by the way

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