Bike Size Calculator is a formulation to deduce right bike dimensions by essential cycling characteristics. Result accuracy depends on the precision of user's input, and we assume users to have a good knowledge of bike geometry. For professional advices, please contact Bull Bike's Certified Fitter. Visit Bull Bike Professional Fitting to discover more about Bull Bike's fitting service.

Please input some information on the left hand side to calculate your suitable frame size and initial position.

Body Height Standing height is the measurement the maximum distance from the floor to the highest point on the head, when the subject is facing directly ahead. Shoes should be off, feet 25cm apart, and arms by center to center. Heels, buttocks and upper back should also be in contact with the wall when the measurement is made.

Torso Set your feet 25cm apart with barefoot. Find the sternal notch in your neck. Measure the distance from the point of the notch to the floor.

Forearm Forearm length is the distance between your elbow crease and the base of phalanx.

Arm Arm length is the distance between your greater tubercle and the base of phalanx.

Shoulder The length between the left shoulder to the end of the right shoulder.

Inseam Take the measurements in bare feet. Stand up straight with feet 25cm apart. Distance from the crotch to the bottom of the ground.

Lower leg Make sure your lower leg (90 degree) to the ground. Measure from the top of kneecaps level to the ground.

Feet To find your size, measure the heel-to-toe length.