Now, I first started realizing the existence of folding bikes when I moved to Japan and saw all these manly men riding bikes that might as be built for a 5 year old. Only later, after much critical thinking, that I finally googled it and found out that they're in fact not toys at all but actually foldable bikes. So, besieged by dreams of travelling by train to rural areas and then happily tottering around on my bike, I went ahead and bought (a shimano, I think?) cheap folder for $240.

Now herein lies the problem: It's heavy. According to the sales person, it weighs 15kg, and I think I nearly fractured a hip just by walking a few step with it slung over my shoulders. I really can't see myself struggling with folding it, putting it into a bag, then lugging it up the multiple stairs to the platform. Not without a considerable amount of effort, at least.

I'm not sure what exactly I'm asking - but is there any solution to make it... more portable? A better bag, or a folding bike bootcamp, or a membership to a gym?