Originally Posted by Steve B.

You can gravel on a road bike with 25-28mm tires. I've done it often. It's more enjoyable on a bike that can take a 37-40mm gravel tire. Disc brakes are a plus as well and you don't find that on a 20 year old road bike. And as well your road bike mat have gearing designed for less steep hills on a paved surface, the gravel will likely have lower gearing.

Likewise you can drive your OB on some knarly roads, it does have 8-1/2" of clearance, like a lot of trucks, but can't go places where you need less overhang and maybe low range.

In reality, the OB is a lot like a gravel bike, it'll get you most places a road bike isn't comfortable and a mt. bike with 3" tires and full suspension is overkill, kind of like city commuting in a Wrangler.