"I just feel like I fit in the most there and not just with the players, but the coaches and the assistant coaches," Sims told Scout.
"I feel like they recruit everyone differently based on who they are," he added. "I just found that out and I thought that was unique. I feel like they relate to me the most."
The pledge to the Longhorns comes just a day after returning home from his official visit to Texas, which was his first and what will now be his only official visit.
"I sort of already knew it before I went on the official visit," Sims said when asked when he knew Texas was the place for him.
After a strong spring and summer with D1 Minnesota on the adidas Uprising circuit, Sims also strongly considered Minnesota, plus reeled in recent scholarship offers from the likes of Connecticut, Kansas, Ohio State and significant interest from North Carolina and Michigan State.
Sims told Scout that he and Shaka Smart related on many levels including how they "go about their daily lives."
"I dealt with a lot of good coaches, but I think they just relate to me the most," he said. "We are kind of the same person in some ways."
Texas assistant Darrin Horn was aggressive in his recruitment of Sims and his relationship factored in as well.
"He had a great impact," he said of Horn. "Both of them have been calling me frequently and letting me know how serious they were about me coming to Texas."
Sims, a 6-foot-9, 225-pounder out of Minneapolis (Minn.) Cristo Ray Jesuit, ranks as the No. 11 center and No. 48 overall recruit in the 2017 class.
"He has had a lot of athletes," Sims said about Smart. "I just see myself contributing to them in many."
With the addition of Sims to their 2017 class, Texas now has a pair of top 100 commitments. Sims joins four-star Texas native Royce Hamm to make up their current class, which now moves up to the No. 9 in Scout's 2017 class rankings.