though i already knew that deluxe rim is wider, but today got the chance to examine closely, and it felt quite a bit wider than my stock rim, and 90/90 tyre on deluxe rim was very well fit, tyre's side walls were straight, not bent to inside making it baloon like. so yeah, it will cause tyre to make even better contact with ground and will result in more stability and grip.
any idea about rim price???
i might change it on my first tuning.... i am having good feeling about this.