... Took a look at the rear tire when we got back and found that we're down to the wear bars already, with just 4,600 miles on the OEM Kenda.
Not all that uncommon, but do check that you're actually looking at the 'Tread Wear Bars' & not the 'tread stabilisation' & 'Ice/slush Breaker' blocks! :lecturef_smilie:
These different bar types are easily confused, but the Ice Breaker blocks have ribbing on the top (until it's worn off

) and IIRC, are generally in the tread grooves forming a straightish line across the entire tread face; while the 'Tread Wear Bars' are in the grooves forming an angled line across the tread face, and there's a small triangle embossed on the side of the tread with its pointy top aimed at the bars!! There's nothing pointing at the Ice Breakers, cos they're just there to make sure that ice & water do get eventually forced out thru the grooves & sipes in the tread.
However, if you've only worn down to them, rather than to the Tread Wear Bars, you've probably got maybe 2,000 to 3,000 more miles of wear to go to the legal minimum - unless those tires are already giving you the heeby jeebies &/or scaring the crap out of you! If they are, you won't be first, nor I expect the last to change them out early just so you can fit some 'real' tires - few ever regret doing so! :thumbup:
I had pics of the different bar types here years ago, and others showed them too; but I haven't seen them in a while, so it might take a bit of time to find them. I'll do a bit of searching later & see what I can come up with; but you might want to do your own searching too, just to make sure of what you're looking at! :2thumbs:
Cheers :cheers: