First you need to be clear about what you're talking about.
In regularBike-speak,sprockets go at the rear, andchainrings/chainwheelsgo at thefront.
In BMX-speak, a sprocket goes at the front, and a driver goes at the rear.
If you're speaking BMX, the most obvious difference is the size, the tooth count.
For the same size driver, a bigger sprocket will make the bike slower off the start, but give it a higher top speed.
For the same size driver, a smaller sprocket will make the bike quicker off the start, but give it a lower top speed.
If you change the driver to match, start and top speed will remain the same, even with a smaller/bigger sprocket.
A small sprocket will increase the ground clearance. Better if you're riding ramps as there's less risk of the sprocket/chain hitting the lip as you drop in.
If you're not riding ramps, well, a smaller sprocket is still lighter, which is a kinda-sorta advantage. The downside is that the smaller they get, the faster they wear. And the chain wears too.
The smaller the sprocket, the lighter the sprocket and the shorter the chain. The shorter the chain, the lighter the chain. Just remember to reduce your rear gear when you use a smaller front chainring or you're going to be spinning like mad. For example: Typical set up is 44 in the front and 16 in the back. If you put a 38 tooth chainring in the front, make sure to reduce the rear sprocket to a 14. Essentially, you take the number of teeth up front and divide by the rear. Simple. Ideal BMX gear ratio is 2.75, but different people have different preferences.
First you need to be clear about what you're talking about.
In regular Bike-speak, sprockets go at the rear, and chainrings/chainwheels go at the front.
In BMX-speak, a sprocket goes at the front, and a driver goes at the rear.
If you're speaking BMX, the most obvious difference is the size, the tooth count.
For the same size driver, a bigger sprocket will make the bike slower off the start, but give it a higher top speed.
For the same size driver, a smaller sprocket will make the bike quicker off the start, but give it a lower top speed.
If you change the driver to match, start and top speed will remain the same, even with a smaller/bigger sprocket.
A small sprocket will increase the ground clearance. Better if you're riding ramps as there's less risk of the sprocket/chain hitting the lip as you drop in.
If you're not riding ramps, well, a smaller sprocket is still lighter, which is a kinda-sorta advantage. The downside is that the smaller they get, the faster they wear. And the chain wears too.
You might have to either lengthen or shorten the chain, depending on if you're getting a bigger or smaller sprocket.
It will if you have bmx (or bmx style) cranks.
the easiest way is to go to your local bike shop
A hyper is better
Not a sprocket only, but you can buy a 23-tooth freewheel that should fit.
First you need to be clear about what you're talking about.In regular Bike-speak, sprockets go at the rear, and chainrings/chainwheels go at the front.In BMX-speak, a sprocket goes at the front, and a driver goes at the rear.If you're speaking BMX, a small sprocket will increase the ground clearance.Better if you're riding ramps as there's less risk of the sprocket/chain hitting the lip as you drop in.For speed it doesn't matter, as long as you pick a driver with a suitable tooth count.If you're not riding ramps, well, a smaller sprocket is still lighter, which is a kinda-sorta advantage.The downside is that with a smaller sprocket, you will have to use a smaller driver. And the smaller they get, the faster they wear. And the chain wears too.
First you need to be clear about what you're talking about.In regular Bike-speak, sprockets go at the rear, and chainrings/chainwheels go at the front.In BMX-speak, a sprocket goes at the front, and a driver goes at the rear.If you're speaking BMX, the most obvious difference is the size, the tooth count.For the same size driver, a bigger sprocket will make the bike slower off the start, but give it a higher top speed.For the same size driver, a smaller sprocket will make the bike quicker off the start, but give it a lower top speed.If you change the driver to match, start and top speed will remain the same, even with a smaller/bigger sprocket. A small sprocket will increase the ground clearance. Better if you're riding ramps as there's less risk of the sprocket/chain hitting the lip as you drop in. If you're not riding ramps, well, a smaller sprocket is still lighter, which is a kinda-sorta advantage. The downside is that the smaller they get, the faster they wear. And the chain wears too.
it would depend on whither you are riding on a mountain bike or something that wont be doing stunts or a bmx or dmr. for mountain bike it probably will not matter whither it is big or not however for bmx or dmr it would be a good idea to have a smaller one as when at skate parks eg. you where going to drop into a bowl that is quite steep if you have a big on then the chances are it is going to hit the coping (top of edge) and maybe fall off. also if you are thinking of getting a smaller sprocket you will need to get a smaller cassette but don't guess how big the cassette should be for a sprocket just take it to a bike shop and they should be able to tell you. for a smaller sprocket i would recommend a 25t to 30t,, the 25t will have to have about an 8 or 9 tooth cassette. hope all of this helps took me a while to type out anyway :P!!
Two, but this is not the same as how many speeds the BMX bike in question has. A BMX bike has a sprocket in the front, and a cog in the back and each is a gear, but is considered a single speed bicycle because two gears and a chain are required for transmission of rotational force from the crankset to the rear wheel.
It's not really a question of better, more of different. What decides how fast the top speed of the bike is, and how nippy it is off the start is the ratio between the tooth count of the crankset, and the tooth count of the freewheel. With a smaller freewheel you can have a smaller crankset, a slightly lighter bike and get the same feel of the bike as with a bigger crankset and a bigger freewheel.
No. a 9T sprocket will only fit a cassette hub, and not freewheel hubs.
Go for the ipod touch 4g. It is faster than the bmx.