Hey there - 57, 5'9" (175cm) and 271 lbs (123 kg) here. I've lost 25 lbs since May by biking and altering my diet (no special diet -- just eating a lot less and and no junk). When I started in May I was riding about 4 miles a day and taking a break halfway through. Now riding 11 miles a day and rode 30 miles this past Sunday.
My goal is to ride the Great Allegheny Passage and C&O Canal Trail later this Fall. I rode the C&O Canal Trail about three decades ago. The 30 mile trip on Sunday showed me that it's certainly possible but I have some work to do, heh heh.
After reading reviews here and elsewhere, I just bought my first Brooks B17 and it is worth every penny. Throwing caution to the wind I used it for the first time on the 30 mile trip and my butt felt better after that 30 miles than it has after 10 miles on other seats.
Bikes include a Trek 7300 that I use now and a Trek 720 that I would like to restore to its former glory.