Calculating Spoke Length: How to Build a Rear bicycle wheel (700c, 32 spoke), measuring the Spokes

Watch on TheBikeTube.com!!: thebiketube.com In this wheel building tutorial we build a 32 spoke rear 700C rear road wheel. In this first video we will determine the spokes length we need to build the wheel. First select your hub and rim. We selected a 32 hole Mavic Open Pro and a Specialzed S-Works 32 hole hub. The most common method of determining spoke length in the age of the internets is to head to an online spoke calculator. In this tutorial we will be using United Bicycle Institute’s (UBI) spoke calculator. (Wouldn’t want to be a Divided Bicycle Institute!) In order to deterimine the spoke length the factors you need to know are: 1. Wheel or Tire Size: (Road wheels are typically 700c, Mountain 26″) In this case we’re building a 700C road wheel. 2. ERD (Effective Rim Diameter): This is either posted on the rim itself, brands like Velocity and others have a sticker on the rim that will tell you the ERD. Most quality rims have this. Unfortunately Mavic does not, but usually its online somewhere. 3. Hub Flange Diameter: This is the measurement of the hub between two holes directly opposite each other on the hub flange. Measure from the middle of the hole to middle of the opposite hole. This is where a caliper can be really helpful. Since we are building a rear wheel, the dish of the wheel becomes a factor. A rear bike wheel is “dished” because the space the cassette takes up on one side of the hub causes the hub flanges to not be centered. Therefore, the spokes on the …