The arrest comes more than six months after Gordon Ibbs was struck by a car while cycling on Geelong-Ballan Road in Anakie, near Geelong, at about 2.30pm on May 10.

Police allege the car involved failed to stop at the scene.

Mr Ibbs was a retired Ford worker and avid cyclist.

A 26-year-old Whittington man was arrested outside the Geelong Magistrate's Court at 9am on Monday.

"He is currently in custody, assisting police with their enquiries," a police spokesperson said.

In July, Mr Ibbs' daughter Charlene Christensen made a heartfelt plea for the man who fled the scene or anybody who helped him to come forward.

"Imagine if it was your dad, if it was your loved one: you would want resolution," Ms Christensen said.

"I lost out, my family lost out on the day. But [the driver involved has] lost out; he's lost peace of mind. How can he sleep at night?

"He can run, but he can't run forever."

She had added that she did not feel anger towards the driver that killed her father.

"There's so much sorrow in my heart … there's no room for anger," she said.

Investigators had received several tips about the identity of the driver through the anonymous Crime Stoppers hotline following appeals to the public for information.

"I am certain if one of those people who have contacted the police anonymously came forward, we would be in a position where we could prosecute the offender responsible for this dreadful act," Detective Inspector Bernie Rankin from the Major Collision Investigation Unit said at the time.