my bike is old 26 it seems to be old EA3 bike , i have 26 x 1 3/8 wheels ( 37-590) , with old suntour freewheel
the rear wheel stuck 1 week ago , and i'm gonna change the bearings balls (steel balls ) for the both rear wheel sides , and i have some difficulty in replacing the inner side ( freewheel side ) bearings balls but i will resolve that by removing the free wheel
first question is : this is my freewheel pic



does this park tool fit my freewheel ?
New Lifu Bike Tool for Suntour 2 Notch Prong Freewheel | eBay

2nd question : what is the steel balls recommended size for both sides ? and if i need to change the freewheel steel balls will it be the same size for the wheel one ?

3rd (last) question : if i wanna buy a new derailleur for the bike , which kind fit?

i know that going to LBS is good idea but not for me , if i have enough money to do i will do without asking someone
i know also that my bike is too old , but that's what i got for now and i cant buy a new one .

thanks in advance

Yes the tool fits. Need pictures of the bike to answer those questions. EA3 is a rim size not a bicycle. Roger

Why don't you just buy the parts from the LBS? Because you bring them your bike to insure proper size and style parts (like balls and ders) doesn't mean that you have to let them do the labor too. In fact I enjoy helping customers who do their own work. they become my most informed customers and really appreciate my hints and advice (that comes for free BTW).

The rear wheel balls needed will be the same size that is in there already, likely 1/4" x 9 a side. But you need to confirm this as I don't have telescopic X-Ray vision. The der needed will have to have the same type of attachment design and be able to handle the cog sizes (front and back). If the levers are indexed (which I doubt given the old Sun Tour Perfect freewheel) then the der will need to be within the family of compatibility for ST indexing. If not then any brand that matches the cog teeth capacity will do.

All this would have be found out in about 1 minute to discover if the bike was in front of the LBS. Andy.

thanks rhenning , my wheel is 26 x 1 3/8 , is that refer to the rim size too ( ea3 ) ?

i hope if your shop in my neighborhood but actually the nearest bike shop to me is about 22 mile while i don't have a car to transport the bike ,, any way i'm gonna capture my bike and edit the pics to the post

thanks andy