I'll take your word for it as I have no idea why a Brompton with Sun CR18 rim fitted with Schwalbe Marathon Plus tyres, other than the small size, should be any different.
It's because there's no well to give the tyre the clearance you need. A few other guys on the forum had said how difficult it was, but I thought I knew better.I'll take your word for it as I have no idea why a Brompton with Sun CR18 rim fitted with Schwalbe Marathon Plus tyres, other than the small size, should be any different.![]()