First impressions are that they ride MUCH better than stock. Swallow up bumps and really smooth the ride up. There may be a very slight loss of power but you would really have to be looking for it to notice it. Mounted, each front tire/wheel weighed 8 lbs more than stock and each rear was 12 lbs heavier.
I had been considering 27” terrabites too but I’m very glad I went with the bearclaws. Found a great deal at denniskirk.com too. Under $400 for the set shipped.