[AK]

For a 98 onwards 583, you'd not go too far wrong in using 15/45 or 15/46 (virtually std gearing)

Pre 98 583's use a different primary gear ratio, which is what Skids ratio is right for.

Edited to add: if doing the woodland circuit only, then change front to 14 tooth.

Alan

[Edited on 18-12-2005 by AK and CK]