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# Does a bike chain apply torque?

Updated: 12/9/2022

Wiki User

15y ago

Yes. The chain applies a linear force to the cog on the rear wheel. It pulls it forward when we "go" on the bike. The teeth on the cog, where the linear force is applied, are arranged around the center of rotation of the rear axle. This applies a force to the axle that is "off center" with the axis of rotation of the axle. The axle is perpendicular to the plane of the cog, and this is true. But the actual "pull" of the chain is on the back teeth and the top teeth of the cog. The axle cannot move forward because it is fixed, but the axle can rotate because a good portion of the force applied to it causes it to turn. A bike chain applies torque to the rear wheel. Torque is a momentary force, and in the case of the bike chain, a continuous series of moments of force applied to the rear wheel by the chain turns the rear wheel. Another way to look at the problem is to consider that the feet move up and down (and a little forward and back) on the pedals. The crank and chain ring turn around. The chain moves in a line or displays linear motion, and the rear wheel displays rotary motion. The transition from linear motion to rotary motion applies the idea of torque.

Wiki User

15y ago

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Q: Does a bike chain apply torque?
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Loosen the rear axle nut. Next, loosen the nuts that lock the wheel adjusters and look for the notches that tell you the position of the wheel telative to the bike frame. Move the wheel back a bit until you are sure the chain has the optimal tension. Make sure the wheel is not skewed to either side by looking at the notches on either side. Get a torque wrench to fasten the wheel in place at this point. The chain must have a bit of slack, it should never be totally stretched out. You should have about 1.5 inches of vertical chain movement when you push it up. Clean the chain with WD40 or some thin oil that you then wipe off. Now apply chain lubricant or simply engine oil to the chain. Take a test drive on the bike, then check if the wheel is tightly in place and that the chain has the tension you want.

### How do you tighten a loose chain on a 1988 Honda Shadow?

Loosen the rear axle nut. Next, loosen the nuts that lock the wheel adjusters and look for the notches that tell you the position of the wheel telative to the bike frame. Move the wheel back a bit until you are sure the chain has the optimal tension. Make sure the wheel is not skewed to either side by looking at the notches on either side. Get a torque wrench to fasten the wheel in place at this point. The chain must have a bit of slack, it should never be totally stretched out. You should have about 1.5 inches of vertical chain movement when you push it up. Clean the chain with WD40 or some thin oil that you then wipe off. Now apply chain lubricant or simply engine oil to the chain. Take a test drive on the bike, then check if the wheel is tightly in place and that the chain has the tension you want.

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Loosen the rear axle nut. Next, loosen the nuts that lock the wheel adjusters and look for the notches that tell you the position of the wheel telative to the bike frame. Move the wheel back a bit until you are sure the chain has the optimal tension. Make sure the wheel is not skewed to either side by looking at the notches on either side. Get a torque wrench to fasten the wheel in place at this point. The chain must have a bit of slack, it should never be totally stretched out. You should have about 1.5 inches of vertical chain movement when you push it up. Clean the chain with WD40 or some thin oil that you then wipe off. Now apply chain lubricant or simply engine oil to the chain. Take a test drive on the bike, then check if the wheel is tightly in place and that the chain has the tension you want.

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Loosen the rear axle nut. Next, loosen the nuts that lock the wheel adjusters and look for the notches that tell you the position of the wheel telative to the bike frame. Move the wheel back a bit until you are sure the chain has the optimal tension. Make sure the wheel is not skewed to either side by looking at the notches on either side. Get a torque wrench to fasten the wheel in place at this point. The chain must have a bit of slack, it should never be totally stretched out. You should have about 1.5 inches of vertical chain movement when you push it up. Clean the chain with WD40 or some thin oil that you then wipe off. Now apply chain lubricant or simply engine oil to the chain. Take a test drive on the bike, then check if the wheel is tightly in place and that the chain has the tension you want.

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Loosen the rear axle nut. Next, loosen the nuts that lock the wheel adjusters and look for the notches that tell you the position of the wheel telative to the bike frame. Move the wheel back a bit until you are sure the chain has the optimal tension. Make sure the wheel is not skewed to either side by looking at the notches on either side. Get a torque wrench to fasten the wheel in place at this point. The chain must have a bit of slack, it should never be totally stretched out. You should have about 1.5 inches of vertical chain movement when you push it up. Clean the chain with WD40 or some thin oil that you then wipe off. Now apply chain lubricant or simply engine oil to the chain. Take a test drive on the bike, then check if the wheel is tightly in place and that the chain has the tension you want.

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