A rachet consists of a round gear or a linear rack with the teeth, 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 average slope using one edge and a very much Ratchets Wheel steeper slope on the various other edge.
When the teeth are moving in the unrestricted (i.e. forward) route, the pawl easily slides up and over the delicately sloped edges of one’s teeth, with a planting season forcing it (generally with an audible ‘just click’) in to the depression between your teeth as it passes the tip of every tooth. When the teeth move in the contrary (backward) direction, on the other hand, the pawl will catch against the steeply sloped edge of the primary 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 motion at discrete tips (i.e., at tooth boundaries), a ratchet does allow a restricted amount of backward motion. This backward motion-which is limited to a maximum distance equal to the spacing between your teeth-is called backlash. Where backlash must be minimized, a soft, toothless ratchet with a higher friction surface such as rubber may also be used. The pawl bears against the top at an angle in order that any backward motion will cause the pawl to jam against the surface and as a result prevent any further backward motion. Since the backward travel length is primarily a function of the compressibility of the excessive friction surface, this device can bring about significantly reduced backlash.
This Ever-power 54t Ratchet kit works as a primary replacement and is super easy to install. Just remove the freehub human body the parts you see here will maintain there, grease up the new parts and re-assemble the hub. Boom! You’ve simply substantially increased the engagement tips on your hub. To provide you with a better idea of how this enhances your ride think of the engagements in levels of a circle, with the 18t you’ve got to maneuver the cassette 20 degrees to attain the next engagement and with the 54t that knocks it down to 6.66 degrees! That’s significantly less than a 3rd the length it needs to go to hit another tooth! You could 
be wondering when you can really see the difference. Simply pedal your cycle around and keep the bike moving by using small pedal strokes and back-pedaling. You will see there’s going to end up being lot’s of slop between engagements. Visualize if that “slop” was decrease to a third! I’m sure you can imagine that’s a huge upgrade. Therefore, if you weren’t already totally convinced on the 54t ratchet package I hope this is the turning indicate getting one!
