What is the best ratio of handlebar to seat height?

Summary:The height ratio of handlebar and seat is 1:0.8. About the setting of the bicycle seat height: 1. Loosen the seat tube ...
The height ratio of handlebar and seat is 1:0.8.
About the setting of the bicycle seat height:
1. Loosen the seat tube clip, clamp the seat with your armpit, stretch out your arm and use your middle finger to touch the position of the central axis (the pivot point of the crank), at this time, pay attention, try to relax the arm as much as possible, and let it sag naturally State, this method is to use the proportion of the human body to measure, but this method may not be accurate, after all, the length of each person's arms is different, and can be finely adjusted.
2. After adjusting the height according to the first method, find a pedal point to ride on the bike, touch the pedal surface with the sole of the foot, and put the pedal to the 3 o'clock position (horizontal state) when the knee should be in a vertical state with the pedal , the extension angle of the leg should be kept at about 170° when the pedal is stepped to the bottom. According to this method, the height of the seat is fine-tuned, and the amplitude of each adjustment is kept at 3-5mm. This is the easiest method, and adjustment in this way may not be very accurate, but the deviation will not be too large.
A slightly more complicated adjustment method:
1. Heel method
There are a few bike shops and methods commonly used by "senior" fitness trainers. First get on the saddle, keep your hips level, turn the pedals to 6 o'clock, and put your heels on the pedals. If your knees are just straight at this point, you've got your saddle height. This method basically obtains the appropriate seat height. This method takes into account the length of the legs, but some riders may not be completely accurate when the proportions of their thighs and calves are different.
2. 1.09 coefficient method
The specific method is to first measure the height of the crotch, the English name is inseam, and then multiply it by a coefficient of 1.09. The calculated value is the distance from the pedal axis to the top of the seat when the pedal is at 6 o'clock. This method has been used for a long time, and the value obtained for the seat height is also more scientific. However, when measuring with scientific instruments later, it was found that this method could not obtain the best power output and pedaling efficiency.
3. Raymond method
Raymond, American, three-time Tour de France champion, Raymond improved the saddle height calculation method based on the 1.09 coefficient method. Multiply the crotch length by 0.883 to get the distance from the top of the saddle to the center of the bottom bracket. Compared with the 1.09 coefficient method, this calculation method is more accurate for the seat height determined by the Raymond method, and there is a "but" here, but this method was found in later studies. The problem with this approach is when a rider has relatively long thighs.