You can adjust your bike’s RAD in a few ways: When it comes to RAD, a bit too short is much better than a bit too long.
Some downhill and freestyle riders, who need more range of motion than peak sprint power, have RADs that are “too short.” This is common among tall riders. When bike RAD is too short, you reduce torque and increase control (to a point). I’ve set up about 1,000 riders, and 95% of their bikes had too much RAD. When bike RAD is too long, you reduce torque and reduce control. You climb technical trails easier and shred technical downhills harder. When you get to the last 10mm, then the last 5mm, then to perfect, something clicks. As your bike RAD gets closer to ideal for you, your bike will start to feel better. We can of course ride a wide range of bike setups (we’ve been doing it for years). Q: How close to perfect does RAD have to be? Bikes have gotten longer but people haven’t.
Warning: These multipliers will give you shorter RADs than you typically find on fashionable bikes. My bikes are within a few millimeters of this number. If you’re female, multiply your height in centimeters by 4.60Īt 174 cm tall I get a RAD of 778mm. If you’re male, multiply your height in centimeters by 4.47 While these recommendations are not gospel, they are good starting points for most people. Use a simple multiplier. The multipliers below assume average proportions, sweet spot handlebar width, height-appropriate crank length, and average pedal and shoe thickness. When you shop for a new bike, try to match that number.Ģ. If you love your current bike, measure its RAD. Dialed: The secret math of the perfect mountain bike setup.ġ.
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