BMI was as good a motivator as any for me too. I needed to get to 215 lbs to be under 25 BMI. I got to 214 a few years ago but have since crept up to 27.5 BMI. I know at 6'6" I'll probably never be below 200 again but I can see that as being a good goal once I get below 25 BMI again.
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80 Mercian Olympic, 92 DB Overdrive, '07 Rivendell AHH, '16 Clockwork All-Rounder