The 17-year-old Kirkby swimmer will officially open the 35m-high structure, which arrives in town on Tuesday night on the back of four lorries.
Mansfield mayor Tony Egginton, who will join Sam for the five-minute ride, said he was confident the attraction would prove a big hit with townsfolk and enjoy the same success as other wheels in Nottingham and London.
- Big wheel comes to Mansfield
"The attractions have been overwhelmingly popular in these cities and I am positive that this will be the same here in Mansfield," he said.
"This offers our residents the rare opportunity to see their district from the sky and for visitors to see from this perspective the many and varied attractions Mansfield has to offer.
"The wheel will be open for four weeks, offering plenty of opportunities for people to have a ride –– and to go home and tell their families and friends!"
The wheel will stay in the Market Place until 8th November and tickets cost £3, £2 for under fives.