Another candidate is the Waymark v2a theme. It is together with Elevate
invaluable for long distance bike trekking along international a/o national cycle route network.
As most themes render cycleroutes too late and often do not distinguish well the route classes ( ICN,NCN,RCN,LCN).
E.g Native Locus hiking/bicycle touring theme shows routes at zoom 13+ what is too late for big picture with ICN or NCN only. Additionally, all have the same colour.
Elevate cycling renders ICN/NCN at Z8-9, other routes at Z12. Similar for Waymark theme.
Waymark theme has additionally a great feature to turn on/off route classes independently.
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