Renshaw's collarbone surgery followed a fractured pelvis he suffered in a collision with a car in Bathurst in 2018, but will not stop him from competing in this year's B2B, the first under a new 100km long course and 50km short course that he helped designed.

"That wasn't the best preparation, but I will be starting on Sunday in the 100km wave," Renshaw said on Tuesday morning.

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"My objective is to ride and say 'hello' to as many people as possible that have come to Bathurst to do the event."

Renshaw - who is also an ambassador for the event - explained that the new 100km long course would take roughly two hours and 30-40 minutes to complete.

"We're not quite sure how long it will take because it's the first year of the new course," he said.

"Both Will [Hodges] and Tom [Bolton] are racing at the highest level in Australia at the moment and have won some big races last year. They envisaged it would take two hours and 30-40 minutes for the race.

"It's going to be quite short compared to professional road racing but it'll be a pretty intense three hours for those riding."

The long course was not originally meant to include the Mount Panorama section of the race, with Renshaw saying it was a late inclusion to keep up with Union Cycliste Internationale (UCI) regulations.

"Originally we didn't have Mount Panorama in there and they needed a few more kilometres to keep the UCI regulations happy," he said.

"We thought it would be a great opportunity to loop around the mountain for an extra 10 kilometres. It's the most iconic thing in Bathurst and it was the perfect opportunity to pitch that forward to the council.

"It got thrown around a bit because it's a bit of a daunting hill for those who don't ride on a regular basis but I think for the general rider to come and race on that circuit on closed roads, it's going to be a big buzz."

Renshaw expects this Sunday's race to attract some of the best cyclists in Australia.

"I haven't been through the start list for the 100km but I only know the numbers," he said.

"It's a big event and a great time of the year, so I'd imagine we've got some of the best riders coming."

As of last week, just under 2000 cyclists had been registered to compete in all events at the Bathurst Cycling Classic from March 14-15, which includes the B2B on the Sunday and the criterium racing and hill climb events on the Saturday.

The B2B event will act as one of three Australian qualifying events for the UCI Gran Fondo World Championships in Canada later this year.

In previous years, the event has started in Blayney (it was previously called the Blayney 2 Bathurst until the Blayney section of the circuit was dumped) and finished at Mount Panorama.

This year's event will start and end in the Bathurst CBD, near the Carillon, with the long course doing a lap of Mount Panorama while the short course will head straight for Gormans Hill Road.

The 100km course will start at 8am, while the 50km course will start at 11am.