Whether you’re buying a new bike or just looking to replace the frame of an old one, you need to know how to measure a BMX bike frame. The frame should be able to support your weight when you land or do tricks. The right bike frame will be suitable for both your weight and your height. The BMX bike frame's distinctive thick tubing should be measured at four key points to determine if it's the right fit.
To measure the frame, you’ll need:
- Caliper that measures in inches and millimeters
- Hold the frame upright to measure the top tube. Find the point where the top tube and seat tube intersect. Find the point where the top tube and the head tube meet. Measure between those two points using the tape measure. For the most accurate measurement, run the tape from the center point of each of those intersections. Round to the nearest 1/2 inch.
- Use the caliper to measure the inside diameter of the head tube. This measurement should be made in inches and will determine the size of the headset. The stem and the fork both go inside the head tube.
- Measure inside the bottom bracket shell. Use the caliper to measure, in millimeters, the bottom bracket shell’s inside diameter. The bottom bracket shell is the location of the pedal crank bearings.
Determine the axle size. Measure the open axle slot with the caliper. The axle slot is located in the frame drop out. It is the fork-like area in which the hub axle slides.
What Others Are Reading Right Now.
Acting, comedy and strong spirits converge in Speakeasy. When host Paul F. Tompkins interviews entertainers—Key and Peele, Alison Brie, Rob Delaney, Zach Galifianakis—about all sor …
10 Things Women Expect Men to Know How To Do
To make ladies swoon or at least not cringe, you’d better be able to handle the following…
We all love fine food—and the people who make it! Eats introduces you to those folks, taking you into the kitchens of all kinds of culinary luminaries. From BBQ to vegan, eco-frien …