Everyone in the know seems quite impressed with your '250w' motors specifications(aka 750w elswhere). But if you are intending a motor swap I would be happy to help you out and buy the old junk motor for 15 euros + pnp to save you all the bother...
Simply over-volting your current hub motor with the 48v battery and current controller (if it is dual voltage 36/48v) should provide you with upto 30% more power
to use the 22a controller safely to full capacity you need to confirm the battery is rated for a higher than 22a continual drain, and then some.. It should be a 3rd metric printed on the battery a value in Amps Not Amp Hours.. attempting to draw more amps from a battery than its rated to supply will result in a failure at best a fire at worst
Since 48v batteries are used for heavy duty i would expect yours to have ample capacity to supply your 22a controller .. but if it went unchecked.....
Simply over-volting your current hub motor with the 48v battery and current controller (if it is dual voltage 36/48v) should provide you with upto 30% more power
to use the 22a controller safely to full capacity you need to confirm the battery is rated for a higher than 22a continual drain, and then some.. It should be a 3rd metric printed on the battery a value in Amps Not Amp Hours.. attempting to draw more amps from a battery than its rated to supply will result in a failure at best a fire at worst
Since 48v batteries are used for heavy duty i would expect yours to have ample capacity to supply your 22a controller .. but if it went unchecked.....