A rachet involves a round equipment or a linear rack with the teeth, and a pivoting, spring-loaded finger named a pawl that engages the teeth. The teeth will be uniform but asymmetrical, with each tooth having a average slope using one edge and a very much steeper slope on the additional edge.
When the teeth are moving in the unrestricted (i.electronic. forward) course, the pawl without difficulty slides up and over the softly sloped edges of the teeth, with a early spring forcing it (quite often with an audible ‘simply click’) in to the depression between your teeth as it passes the hint of each tooth. When one’s teeth move in the contrary (backward) direction, on the other hand, the pawl will get against the steeply sloped edge of the 1st tooth it encounters, therefore locking it against the tooth and preventing any further motion in that direction.
Backlash
Because the ratchet can only just stop backward motion at discrete factors (i.e., at tooth boundaries), a ratchet does allow a limited amount of backward motion. This backward motion-which is bound to a maximum range add up to the spacing between your teeth-is called backlash. Where backlash must be minimized, a smooth, toothless ratchet with a higher friction surface area such as rubber may also be employed. The pawl bears against the surface at an angle to ensure that any backward action may cause the pawl to jam against the surface and hence prevent any further backward motion. Since the backward travel length is generally a function of the compressibility of the high friction surface, this system can result in significantly reduced backlash.
This Ever-power 54t Ratchet kit works as a primary replacement and is super easy to install. Just remove the freehub physique the parts you see here will be in there, grease up the 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 increases your ride think of the engagements in levels of a circle, with the 18t you’ve got to move the cassette 20 degrees to reach 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 move to hit the next tooth! You might be wondering when you can really start to see the difference. Only pedal your bicycle 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. Envision if that “slop” was cut down to a third! I’m sure you can imagine that’s a huge upgrade. So, in the event that you weren’t Ratchets Wheel already entirely convinced on the 54t ratchet system I hope this is 
the turning point to getting one!
