3 ms·
Not really, spokes work under tension rather than compression, you're essentially hanging from the top-most spokes on the wheel. Also if your spokes are too sl
by _Wintermute 2y ago
Not really, spokes work under tension rather than compression, you're essentially hanging from the top-most spokes on the wheel.
Also if your spokes are too slack, they can move in the hub, cause wear, and are likely to snap at the elbow.
- londons_explore 2y agookay - slightly stretchier spokes.
- wiredfool 2y agoNo. Wheels are a prestressed linear superposition of overall tension and a compressive load at the bottom. Generally, you'll see ~4 spokes at the bottom of the wheel relaxing to take the vertical load. (in a properly built wheel) This is due to rims not being completely rigid, but being a somewhat flexible beam. Rims are nowhere near rigid enough to do the "hang from the top" thing. Spokes will break at the elbow, but generally due to fatigue, which is made much worse when there are stress reversals. Fatigue is when cyclic loads cause small imperfections to grow into cracks, and eventually failure. If you have stress reversals under rolling loads (where the stress goes from tension to compression, anywhere in the spoke elbow) you should expect to see spike failures in ~1000 miles. A stress reversal doesn't necessarily mean that a spoke is slack, because there are some interesting stress patterns in the elbow in poorly built wheels.
- _Wintermute 2y agoThe compressive load is negligible, that's why you can build a wheel entirely out of non-rigid spokes such as liteweight wheels or https://berdspokes.com/ https://berdspokes.com/
- wiredfool 2y agoThere should never be a _net_ compressive load on a spoke, but a spoke can carry a compressive varying/live load if there's sufficient pre-tension from the building process. You wouldn't want berd spokes to go slack any more than you'd want steel spokes to go slack.