The Cheapest Sprockets to Buy In 2020

Author: Tim   Date Posted:29 January 2020 

Sprocket Buyers Guide 


⅛ VS 3/32

When talking sprockets the term ⅛ and 3/32 refers to the thickness of the sprocket where the chain bites to the teeth. ⅛ Inch (0.125", 3.18 mm)  are used on most single-speed bikes including BMX and bicycles with internal gearing. 3/32" (0.094", 2.30 mm) chain is used on derailer equipped bicycles that have more than 3 cogs at the rear. The majority of BMX brand sprockets that you will buy for your freestyle BMX bike will be ½ inch. 



BMX sprockets come in a number of materials majorly 7075 heat-treated alloys, or 4130 Chromoly. From a weight perspective, alloy is the more lightweight and comes in at a cheaper price point, where 4130 Chromoly sprockets provide a different aesthetic to your bicycle. The material of your sprocket is really dictated by the brand of sprocket your after as not all companies make both options. 



The number of teeth you have on your sprocket changes the way your bike will rider. The ratio between your front sprocket and rear driver will change the way your bike feels when you pedal. The closer the size of the driver and sprocket to matching the easier it will be pedal but the more cranks required to gain speed. At the polar end of the spectrum the greater the difference between the front and rear the harder it will be to pedal but the lesser time spent to gain speed since more effort is required to crank forward. Sprockets come in a number of sizes which once again are used in different ways on the bike. Flatland riders will generally have a smaller sprocket because it’s easier to gain speed faster and s out of the way of the rider. Where trails riders will tend to opt for larger sprockets so they require less effort when cranking to gain speed. Teeth options start as low as 24 and go up to 45 for most bikes with some riders getting more specialized flatland specific sprockets. 

Guard VS Non-Guard

If you haven’t been living under a rock for the past 10 years you would have noticed many brands offering a guard to protect your teeth on your sprocket. These guards aren’t a new thing in BMX but have dramatically improved in recent years. Guarded sprockets aren’t offered by all companies, however, companies with more of a street image have dived into this niche.

The main advantage of having a guard sprocket is that it protects your sprocket’s teeth while grinding. These guards also make certain tricks more simple since there is less to get stuck on while grinding. Some companies have now introduced a plastic guard, similar to that of a plastic sleeve for a peg. This type of guard system offers replaceable plastic plates so you can ensure more life out of your sprocket.


BMX Sprockets start as low as $18 and can cost as much as $160, at the cheaper end of this are the alloy, beginner end sprockets. These cheaper sprockets aren’t terrible in quality but off a lower level of quality than a $160 guarded sprocket. Being the driving force of your bike your sprocket needs to be reliable and so when thinking about choosing the right sprocket for your ride take some of the above points into consideration to make your sure sprocket is suitable for your build.