2017 TBT Frame Sizing / Geometry

Dutch

frame size: 43cm (seat tube c-t)
standover height: n/a
recommended rider height: 4'10"-5'8"
 

Small

frame size: 44.5cm (seat tube c-t)
                    41cm (seat tube c-c)
                    top tube: 53cm (c-c)
standover height:
recommended rider height: 4'11"-5'6"
handlebars: 500mm width
crank arms: 165 length
gear ratio: 44/18

Medium

frame size: 54.5cm (seat tube c-t)
                    51cm (seat tube c-c)
                    top tube length: 56.5cm (c-c effective)
standover height:
recommended rider height: 5'7"-5'11"
handlebars: 580mm width
crank arms: 170 length
gear ratio: 44/18

Large

frame size: 61.5cm (seat tube c-t)
                    58cm (seat tube c-c)
                    top tube: 59cm (c-c)
standover height: 34"
recommended rider height: 5'11"-6'5"
handlebars: 640mm width
crank arms: 172.5 length
gear ratio: 46/18

 

What is seat tube c-c?

Traditional measurement for classic, horizontal top tube (men's) frames. The distance along the seat tube from the center of the bottom bracket to the center of the top tube.

What is seat tube c-t?

Modern standard for sloping top tube frames. The distance along the seat tube from the center of the bottom bracket to the top of the seat tube.

What should I do if I'm between sizes?

If you have short legs for your height, size down to ensure you can stand over the frame comfortably.

Why does the dutch bike have such a large height range?

The dutch bike features a step through frame, so that shorter riders will have no trouble standing over the frame or mounting the bike. The seat and handlebars are highly adjustable to accommodate taller riders as well.

 

2016 TBT Frame Sizing / Geometry

 

Small

frame size: 51.5cm (seat tube c-t)
                    48cm (seat tube c-c)
                    top tube: 53cm (c-c)
standover height: 30.75"
recommended rider height: 5'3"-5'7"

Medium

frame size: 56.5cm (seat tube c-t)
                    53cm (seat tube c-c)
                    top tube: 56.5cm (c-c)
standover height: 32.25"
recommended rider height: 5'7"-5'11"

Large

frame size: 61.5cm (seat tube c-t)
                    58cm (seat tube c-c)
                    top tube: 59cm (c-c)
standover height: 34"
recommended rider height: 5'11"-6'5"