Bob,
The following link will give you the wheel sizes for all model years (select year at bottom)
http://keystone-montana.com/?page=specs&year=2006
The earlier models used a 6 lug hub on the lighter weight trailers and 8 lug hub on the heavier weights - but changed in 2005 or 2006 to 8 lug hubs on all models.
Note: that the lighter trailers in pre-2005 show a 15" wheel and Load Range D tires - however Montana offered an upgrade option to 16" wheel and Load Range E tires - the trailer could have been delivered either way originally.
Brad & Dory
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2003 2955RL - 5.5KW LP Gen - great for the lake!
2006 F350 Stroker Lariat towmoter - love the trans shift and integrated brake controller.
'95 SeaRay 200BR named
Dam-It - occassional tow buddy
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