Your Sprocket is what seperates us from scooter riders, the ability to propel ourselves forward without having to touch the ground. So we believe that this is a pretty critical point on your bike. If your struggling to figure out which sprocket is right for you, start here by reading through our BMX sprocket buyers guide.
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 number of teeth you have on your sprocket changes the way your bike will ride. 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 to 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.
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 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