what do you mean by freewheel is that the cog wheel on back wheel As it’s an electric moped and on the back wheel I counted the points of the cog and there is 17. So do that mean I need a 17 speed chain thenHow many gears does your teAr freewheel / cassette have? For example If it is 9 sorockets you need a 9 speed chain
So just get a 9 speed chain plus that chain toolany 9spd chain should do just make sure it has enough links.
KMC X9-93 9 Speed Chain | Merlin Cycles
Buy your KMC X9-93 9 Speed Chain at Merlin. Free worldwide delivery available on most items!www.merlincycles.com
you will need a chain tool to remove the extra links you dont need.
Topeak Chain Tool Universal | Halfords UK
Shop the latest Topeak Universal Bike Chain Tool is a versatile chain tool that helps maintain your bike`s chain. at Halfords UKwww.halfords.com
yeah it’s a electric moped not working atm but thought may as well get a new chain. It maybe the controller what’s at fault don’t know yet. But it’s a ERider model 15.yeah as take it you just have 1 gear so spd of chain does not matter in that case.
This is an article on chains and the difference.
You need a single speed chainChain Compatibility
This article will review the basics of bicycle chain compatibility to help you know how to choose the right chain for your bike.www.parktool.com
I agree with Raboa, looking at the pictures it looks like a single speed. If you buy any multi speed chain like 7/8/9 speed etc it will be a so called "3/32" chain, yours could be a 1/8th wide single speed chain so the best way is to take the chain off and then any bike shop can identify it and sell you the right one.