Seatposts should be periodically removed from the frame, cleaned, greased and refitted to prevent the seatpost seizing in the frame. This is particularly important with bikes which do not have mudguards (fenders) that are regularly ridden in wet conditions. Care should be taken not to overtighten the bolt or quick-release lever which clamps the post in the frame, especially where this acts on two brazed lugs rather than a separate clamp-on collar. Overtightening can bend or break the frame lugs or strip the threads in a separate collar. Metal seatposts should be very well greased, with the slot in the bicycle's seat tube also filled with a smear of grease. This helps to prevent water from running down the seat tube.
To help compare different orders of magnitude this section lists lengths between 10 and 100 kilometres (10 4 to 10 5 metres ). The myriametre  (sometimes also spelled myriameter , myriometre and myriometer ) (10,000 metres) is a deprecated unit name; the decimal metric prefix myria-  (sometimes also written as myrio-    ) is obsolete    and not included among the prefixes when the International System of Units was introduced in 1960.