Our Mission: To protect, preserve and promote the natural integrity of Radnor Lake through land acquisition, environmental education and park support.
Chains up to 12 mm thick are generally portable: you can carry them around on your bike every day. The long ones will be really heavy though, so please check the weight. Above 12 mm the chains are more suitable as stationary locks: you would leave them wherever you lock your bike for long periods of time.
Most treadmills have 2 ply belts that are of the same thickness. Anything less would not be recommended. The stronger the belt, the better it will perform and last. The size of the belts range from 14 to 24 inches wide. As for the length, they are anywhere from 45 to 63 inches long.