i'm having some issues. my plan was always yo change the wheel hubs over from the electric hub to the boardman pro. but i hit a bit issue the amount of spokes lol. so i will have to use the hub supplied. the troble i have the boardman has a 15 inner rim and a 32c Tyre. the electric hub is a 19 inner rim with a 40 Tyre. can i put a 32 Tyre on the electric rim. the Boardman has nice mudguards and when i try the wheel the tyres to thick. ive looked at a sizing guide and what im reading is a 32c tyre is suitable for a 15, 17 and 19 inner rim. does that sound right. thanks