or more expensive? i don't what to do, some person said i need my frame size, im 5.6ft, but i can not understand this, what will be the wheel size i mean how sizes exist? if is more bigger is better? depends on what?, im new in this subject please every advices will welcome, i love this kind the bike cause look somethig between race and mountain bike, i mean looks light and strong at the same time, so please include advices, thanks