Quote:
Originally Posted by Chris is me
Belts don't stretch.
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A very important lesson that we learned this year is that Belts DO stretch, but it is a little nuanced.
Belts DO NOT stretch appreciably over time. ie. if your spacing is setup properly you will not need to add tension over time because the length of the belt will be constant.
Belts DO stretch instantaneously. If you shock load the belt hard enough it will flex outward in such a way that it can stretch slightly. Possibly enough to skip some teeth. I have some high speed video of this if you want to verify.
Chain DOES stretch appreciably over time. It will need to be cared for.
Chain DOES NOT stretch instantaneously in an appreciable way. As long as your mounting is done well, the length of the chain should not change during shock loads.
If anyone cares to contradict the above, please do. Right now these are all anecdotal, and I would love something more concrete.