A rachet involves a round gear or a linear rack with tooth, and a pivoting, spring-loaded finger known as a pawl that engages the teeth. The teeth happen to be uniform but asymmetrical, with each tooth having a moderate slope using one edge and a very much steeper slope on the additional edge.
When the teeth are relocating the unrestricted (i.e. forward) route, the pawl quickly slides up and over the lightly sloped edges of the teeth, with a early spring forcing it (generally with an audible ‘click’) in to the depression between your teeth as it passes the suggestion of each tooth. When one’s teeth move in the opposite 
(backward) direction, even so, the pawl will catch against the steeply sloped advantage of the first tooth it encounters, therefore locking it against the tooth and preventing any further motion in that direction.
Backlash
Because the ratchet can only stop backward movement at discrete points (i.e., at tooth boundaries), a ratchet does allow a limited amount of backward action. This backward motion-which is bound to a maximum range equal to the spacing between your teeth-is called backlash. Where backlash must be minimized, a soft, toothless ratchet with a high friction surface such as rubber is sometimes utilized. The pawl bears against the surface at an angle to ensure that any backward motion will cause the pawl to jam against the surface and therefore prevent any further backward motion. Because the backward travel distance is mostly a function of the compressibility of the huge friction surface, this mechanism can result in significantly reduced backlash.
This Ever-power 54t Ratchet kit works as a primary replacement and is super easy to install. Just take away the freehub human body the parts you observe here will be in there, grease up the new parts and re-assemble the hub. Boom! You’ve merely drastically increased the engagement things on your hub. To provide you with a better notion of how this boosts your ride think of the engagements in examples of a circle, with the 18t you’ve got to maneuver the cassette 20 degrees to reach 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 move to hit the next tooth! You might be Ratchets Wheel wondering if you can really start to see the difference. Merely pedal your bike around and keep carefully the bike moving through the use of tiny pedal strokes and back-pedaling. You’ll see there’s going to end up being lot’s of slop between engagements. Just imagine if that “slop” was decrease to a third! I’m sure you can imagine that is clearly a huge upgrade. Therefore, in the event that you weren’t already entirely convinced on the 54t ratchet package I hope here is the turning indicate getting one!