[thatprogrammer]

Originally Posted by Chris is me

If you put in tensioners, you could mess it up. If you don't, you can't. A very minor tradeoff, I know, but it's worth noting. It's surprisingly easy to overtension a belt.



To me there's basically no benefit to not going 15mm, and the reliability is *much* higher. Even if it does work, why would you want to gamble on the edge of a safety factor with your drivetrain? All of our 15mm setups have been rock solid.

By the way, a good calculator for belt center distance is here. http://www.wcproducts.net/how-to-belts/ We have had good results with zero center distance added. Your mileage may vary based on your tolerances.

Are larger spacers on the wheels required if going 15mm?