Join Date: Feb 2013
Location: Brighton UK
Bikes: 20" Folder, Road Bike
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(V) Belts need to be tight compared to chains, that is a given,
toothed belts less so, but can't be as loose a chain can be.
The idea tension wears stuff out doesn't hold that much water.
A ball park idea for a toothed belt is stood with one foot on a
pedal at 3 o'clock, tension in the top is near double and tension
in the bottom is near zero, the same as a chain, i.e. tension is
related to half max load, and effectively the riders weight.
If you just pootle about, clearly optimum belt tension is lower.