Ok- the question was will it fit and the answer is NO. A 18 tooth freewheel has standard threads and will fit most any freewheel threaded hub. With one exception, the standard freewheel hub can accept 16 tooth and larger freewheels.Sometimes a hub also has metric threads on the opposite side and will accommodate metric threaded freewheels which are available in sizes 13 through 15 tooth. Your 14 tooth freewheel is metric and will only fit hubs with a metric side on them. Such hubs are generally termed flip flop hubs because they can use both types of freewheels.
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.
Usually the sprocket is an inseparable part of the freewheel, and the size of the freewheel is determined by the hub.
Yes
yes
they don't make a 9 tooth freewheel they make a 9 tooth cassette and its better to get a 8 tooth as you can see heres a gear ratio for you to look atPopular Gear CombosSprocketF/W or Cassette2282382592810301133123613391441154416
you would need a cassette. it would have to be 10 tooth
you don't use a freewheel for a 23 tooth sprocket you need a cassette hub heres gear ratios for yaSprocketF/W or Cassette2282382592810301133123613391441154416
Yes, it will work. If it'll be the best for you or not is another question.
Not a sprocket only, but you can buy a 23-tooth freewheel that should fit.
Unless by freewheel you mean driver (in which case 8-9) I haven't ridden bmx in a few years but last time I checked the smallest freewheel you could buy was 12 tooth which would make for quite a low ratio
It will work but your pedaling will be really smooth... basically it will be easy to pedal.... but you also wont get anywhere fast though plus it will look weird here are the specks for gear to gear ratioSPROCKETFREEWHEEL & CASSETTE COG orCASSETTE HUB228 cassette hub238 cassette hub259 cassette hub2810 cassette hub3011 cassette hub3312 freewheel/cog3613 freewheel/cog3914 freewheel/cog4115 freewheel4416 freewheel
possibly, if you have the kind of hub where its solid and you can put on a single piece freewheel than no. But if you have the kinde where you need the single piece freewheel and a bolt to hold it on that yes. what you do is spin the thing that holds it on off and screw your nine piece driver it.