Hello, I am debating wether to buy a Brompton cycle. It's basically the small fold I am interested in. I visited a main Brompton dealer in Birmingham to look at the bikes. Now, the chap in the shop described the method of changing the two triggers and what they are changing...but me being profoundly deaf I am none the wiser!! Could some kind soul on here tell me how the two triggers work on a six speed Brompton please? If I still don't understand it I gather from other forums that the three speed Brompton with a 18% reduced chain wheel may suit me as I walk up most hills...I need to as my legs pain me if I pedal too much. Please help!