smaller wheels on big bike to reduce height I have a SEKAI sprint 1000 bike which is a tiny bit big for me as I have problems reaching with my feet to the ground. The existing seat is already down to the lowest level so can't reduce the height any further.
What I am thinking is to change the wheel to a smaller size. The current size is 27 1/4" (rim). Can I install smaller wheel on this bike without having replace virtually everything? 

If there is a seat available which has slightly lower seat frame so that if I replace the seat then it goes a bit lower (hope this makes sense?)
The first problem with changing the wheel size is surely the brakes. Assuming they're rim brakes, they won't be in the right place for a smaller wheel.

In any case, is it the distance to the ground that is an issue or the distance to the pedals? If it's the latter, then changing the wheel size won't help, however, you might get an extra 5 or 10 mm by using shorter cranks - if this is appropriate for your height.

I would imagine that it's probably better and not much more expensive to trade the whole bike in for one which fits you.