i2 vs x2 for rainy belgium city

[klochto]

Hello,

I have tried i2 during few days in DC , it was wonderful clean streets adapted
to running seg.

But i want to buy one now to run it in brussels witch is dirty rainy city with
quite big "stairs" all over the streets and it much much less adapted to run a wheel chair for example.

So i'm considering to buy an X2 as it will allow me simple transitions between
the footpaths and the street and will be more "bump" tolerant.

I would like to know what is the real overheat of an X2 in term of range .

I can read its a half of an i2 but in offroad use . Witch is normal but on flat street i can hardly imagine to loose half of the range because of the bigger wheels and low pressure tires .

Can some x2 owner get me the "real picture" . Maybe there is some "tricks" like increasing pressure on an x2 , etc .

Thanks
c