Road between Grand Canyon and Arches

If you go the 89 route consider North Rim and it would be a shame not to see Zion and Bryce as both are in my opinion more scenic than Arches. Various rigs take 12 so it shouldn't be a problem or you can backtrack to 89.

Or take 160 to Monument Valley and Valley of the Gods and on up to Arches. Good roads. Consider taking Hole In The Rock road at least as far as Devils Garden which is very interesting and unique. It's a gravel road.