A rachet involves a round equipment or a linear rack with pearly whites, and a pivoting, spring-loaded finger referred to as a pawl that engages the teeth. The teeth will be uniform but asymmetrical, with each tooth having a moderate slope using one edge and a much steeper slope on the various other edge.
When one’s teeth are relocating 
the unrestricted (i.electronic. forward) direction, the pawl without difficulty slides up and over the gently sloped edges of the teeth, with a spring forcing it (often with an audible ‘simply click’) into the depression between your teeth as it passes the suggestion of each tooth. When the teeth move in the opposite (backward) direction, however, the pawl will capture against the steeply sloped advantage of the 1st tooth it encounters, thereby locking it against the tooth and preventing any further motion for the reason that direction.
Backlash
Because the ratchet can only stop backward movement at discrete factors (i.e., at tooth boundaries), a ratchet does allow a restricted amount of backward motion. This backward motion-which is bound to a maximum length equal to the spacing between your teeth-is called backlash. In cases where backlash should be minimized, a smooth, toothless ratchet with a higher friction surface such as rubber is sometimes used. The pawl bears against the surface at an angle to ensure that any backward action will cause the pawl to jam against the top and as a result prevent any more backward motion. Because the backward travel distance is mainly a function of the compressibility of the great friction surface, this device can cause significantly reduced backlash.
This Ever-power 54t Ratchet kit works as a direct replacement and is super easy to install. Just take away the freehub body the parts you see here will be in there, grease up the brand new parts and re-assemble the hub. Boom! You’ve simply drastically increased the engagement factors on your hub. To provide you with a better idea of how this enhances your ride think of the engagements in degrees of a circle, with the 18t you need to approach the Ratchets Wheel cassette 20 degrees to attain another engagement and with the 54t that knocks it right down to 6.66 degrees! That’s significantly less than a 3rd the length it needs to go to hit the next tooth! You could be wondering if you can really start to see the difference. Only pedal your motorcycle around and keep carefully the bike moving by using little pedal strokes and back-pedaling. You’ll see there’s going to be lot’s of slop between engagements. Visualize if that “slop” was decrease to a third! I’m sure you can imagine that is clearly a huge upgrade. Consequently, if you weren’t already completely convinced on the 54t ratchet system I hope it is the turning indicate getting one!