They're pretty thick (re: heavy) but the compound feels really soft. I rarely use the Brompton anymore so I was more concerned with looks than practicality.
That make sense, I still used the Brompton standard tyres as I do a small amount of mileages a day to not get punctured (abet chain is now worn beyond 0.5 after 6 months riding).
thanks. i wonder if they last longer than kojaks.