Wisper Convert motor from one to another

[estax3]

Hi. I have electric moped 250w and it goes up to 15mph. It has small weels and Im thinking about converting all motor to 29er and the question is… will this one go faster or I should forger about this? (sorry for broken english)

 

[Nealh]

It will likely be faster but may struggle on hills.
What size are the current wheels ?

 

[estax3]

It will likely be faster but may struggle on hills.
What size are the current wheels ?

Cant find specs online but checked and its 10-11