Depends on the type of hub. For proper fixies you need a lockring tool(although hammer + drift punch can work) and a chain whip. For single-speed bikes you need a freewheel puller, there are a couple of different versions available.
Many internally geared bikes have the sprockets sitting on splines and held in place with a circlip, for these all you need is a thin bladed screwdriver or two.
For removing the cassette of a freehub bike you need a chainwhip and a splined lockring tool.
That depends on what type of hub it is. Some simply use a spring loaded circular clip. some are threaded on and then use a threaded lockring, some are merely threaded on. You might even have several sprockets(known as a cassette) in which case the sprockets are slid on and held in place by a lockring. Or it might be a freewheel, which is simply screwed on.
www.sheldonbrown.com, www.bicycletutor.com and www.parktool.com/repair/bikemap.asp are good places to start finding out more.
Depends on what part you mean, and the design. If you're asking about the rear sprocket, (cogs engage other cogs, sprockets engage a chain) I can Think of at least Three different options.
Most internal-gear hubs and some Coaster brake/Single-Speed hubs use a circlip and a splined sprocket. Pry the circlip off with a couple of small screwdrivers and the sprocket will lift right out.
Fixies use a reverse-thread lockring. It should be removed using a hook wrench, but can be removed with a hammer and a drift punch.
Some Single-Speeds use a screw-on freewheel. Real cheap ones aren't meant to be neatly removed and have to be disassembled and then the core removed with a pipe wrench. Better ones can be removed by using a special puller tool bit. There'll be a number of notches around the axle that can engage tabs on the appropriate puller, and then the freewheel can be unscrewed. Remember that pedalling torque tightenes it down so they can be on wickedly hard. Putting the puller in a bench vise, then using the Wheel for leverage is a favourite method of getting them off. A hard left will do the trick.
Depends on if it has a quicklink/master link or not. If it has a link that looks different from the others, this link can probably be opened and the chain removed. If it hasn't your best bet is to get a chain breaker tool and use it to press a pin out, which will open the chain. Then use a quicklink/master link to put it back together. Chains CAN be opened and closed with improvised tools, but I'd strongly recommend using a chain breaker instead.
Depends on the design.
For some, undo the pinch bolts on the top right and left of the crank then undo the big bolt....should slide off after that.
For some you need to remove the big bolt going into the bottom bracket, then install the correct crank puller and pull the crank off.
If it's an Ashtabula, one-piece crank, you remove the pedals, unscrew the bottom bracket, and thread the crank out through the frame.
well first you have to see if your cranks are 1 piece 2 piece or 3 piece. if theyre three piece then all you have to do is take off the crank that the side the sprocket is on and take off your chain, then you should be able to just slip your sprocket off, and put your new one on, then attach your crank back on and bolt it on then re attach your chain and your good as new
Sprockets are stuck to the hub, not the rim. And how you remove them depends on the design. THere are two main themes, and a few smaller variations.
This question really doesn't make sense, you don't take a rear sprocket off a rim. The sprocket is stuck to the hub, which is connected to the rim by the spokes. How to remove the sprocket will depend on the type of hub. If it's a single-speed bike you will need a special tool bit called a freewheel puller, of which there are several versions. If it's a fixie you will first need a special wrench for the lockring, and then a chainwhip to pull the sprocket off.
Depends on the style of hub. I'll post a link below where you can read more.
take the cranks off and then take your old sprocket off and then put the new one on and then put the cranks back on.
first. take the left side rear wheel off. then remove the 4 bolts that hold the sprocket to the sprocket holder. then remove sprocket
No it's pointless unless you have a race bmx which doesn't have a front brake anyway
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.
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.Changing to a smaller sprocket on the rear will make your bike heavier to pedal. If you're strong enough to keep cranking at the same speed as before, then your bike will be faster.
A good sprocket ratio for take off is 3.0:1 and up like 16/48 combination will have you pulling up in first.
26lb is around average for a bmx, if you take off brakes and pegs ect it will make a big difference if you are looking to shed some weight.
Take off the chain and then there should be 2 little bolts holding on the sprocket. Remove those and then rotate the sprocket slightly so its teeth line up with the teeth on the output shaft and it will slide right off.
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!!
24lbs is about average, but if you take off the brakes ect. it will make a big difference and take it down to at least 23lbs
take it off then take the sprocket off and also there is no innertube its just like a car tire
There is defiantly money in BMX from sponsor's, competitions etc. But to be able to do this you must be EXTREMELY good at BMX.