How Do You Measure Road Bike Frame Size

Calculating your own bike size chart.
How do you measure road bike frame size. Knowing how to measure a bike frame and what the significance of each measurement is will help you in finding the right type and size of bike for you be it a road bike mountain bike or bike for commuting around town. I look to buy a entry level model or second hand but i want to make sure the frame is the correct for me i m 5 9 which indicates a medium size frame 54cm 55cm but my inseam is 87cm points to a larger bike. It s hard to. Some road bike charts are more specific with up to 6 or 7 categories of bike frame sizes.
I need some advice regarding a road bike frame size. Consider the bike type. A professional bike fit is always a good idea as well. When you know your inseam you can calculate the right bike sizes with the following formula and create your bike size chart within a minute.
The instructions below explain how to measure a classic road bike. The classic style road bike frame is most commonly found on road racing touring and commuting bikes. The frame size is determined by measuring the length of the seat tube in centimeters. The seat tube is the long tube that the bike seat post sticks into.
First consider what kind of bike you want sizing varies greatly between road and mountain bikes as well as between men s and women s models and even between. Look for a size label on the bottom of the seat tube first. Hybrid bike inseam in cm x 0 685 your frame size mountain bike inseam in cm x 0 66 your frame size road bike inseam in cm x 0 70 your frame size. Some brands such as moots even mix the two.
If you look near the bottom of this tube about 3 inches 7 6 cm up from the chain sprocket you ll see a glued on label that states the bike s frame size. The top tube is parallel to the road giving the frame more stability and support.