The 23-year-old finished off an impressive lead-out by her Team BikeExchange-Jayco teammates to finally get her arms in the air after two tight second-place finishes in Adelaide's hilly surrounds.

Roseman-Gannon held an eight-second lead in the general classification over Maeve Plouffe heading into Tuesday's final stage.

She extended that to 18 seconds with victory, with Nicole Frain's runner-up finish on Tuesday moving her into second overall, ahead of Plouffe.

Joined by teammate Georgia Baker, Roseman-Gannon clipped off the front of the bunch early in the third stage before rejoining the peloton and again surging clear in the dash for the line.

Roseman-Gannon was caught up in a stage one crash but accumulated maximum bonuses points in intermediate sprints to take the overnight lead.

She then extended it in similar fashion on Monday before rubber-stamping the victory on Tuesday in Lobethal.

"After the last two seconds I was pretty hungry, and my team every day, and especially today have been riding so, so well for me," the Australian criterium champion said.

"There's a lot of pressure when you have such a high calibre of riders riding for you, so I really felt the pressure today, I was really nervous, but I'm so glad I could finish it off, it's a dream.

"It's absolute relief, it's joy and relief.

"Everyone in my team is so good and I feel like I should be riding for them, not them riding for me and just every day they're smashing themselves for me, so it means so much to actually finish it off for them. I'm really, really happy I could do that."

Australian Associated Press