7 speed freewheel upgrade options.

Retrorockit

Old School Hero
Hub motor Ebikes still use the English threaded freewheel format. There are wider range, and higher gear count freewheels available due to this. 7,8,9 speeds and ranges up to 11-34t range.
There may be other brands and other vendors. When they say Ebike rated they mean hubmotors. High powered mid drive Ebikes (like mine) will probably pull this format out of alignment and cause shifting problems.
The axle bearings on Freewheel hubs are close together due to the single speed origins of freewheel bikes. Bent axles in MTB use are common. The older freewheels have a 14t small cog because there is a bearing inside of it. The smaller cog versions moved the bearing further in. Freehub is a more modern and robust format made for multispeed bikes.
The 11t freewheels are cheap, they fit older bikes, and will probably work OK for casual cycling. I'd say buy a spare ,or 2.
 
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