Trainers who exist on the edges of city success hold the key to Nash Rawiller's unlikely late-season charge towards another Sydney jockeys' premiership at Canterbury on Wednesday.

After riding seven city winners last week, Rawiller has taken a sizeable chunk out the lead Hugh Bowman has enjoyed for most of the second half of the racing season.

And going into the Canterbury fixture, Rawiller finds himself only 8-1/2 wins behind the holidaying Bowman with seven city meetings left in 2012-13.

In his current form and with Bowman expected to ease his way back into the saddle with a small book of rides at Warwick Farm on Saturday, Rawiller's task isn't insurmountable.

His book on Wednesday includes one mount for leading trainer Peter Snowden but his other rides are for stables sitting well outside the top 10 on the premiership table.

But the lack of opportunities from mainstay trainers Gai Waterhouse and Chris Waller might not be the setback it seems on paper.

At least one of his mounts, the Canberra-trained Rose Of Falvelon, is expected to be popular in early markets on the Testa Rossa @ Vinery Stud Handicap (1100m).

Rose Of Falvelon has won four of her six starts for Nick Olive, the latest a 10-length romp in course record time on Canberra's Acton track.

"I'm not sure if Nash rang for the ride or if Nick rang him but either way we've got the right man on her back," Olive's stable foreman Don Brown said.

Olive, who is also on an end-of-season break, regards Rose Of Falvelon as a serious sprinting prospect.

"Nick thinks very highly of the mare, he always has," Brown said.

"She's had a few little problems here and there but now that we've got her up and going she's doing well for everyone."

The Allan Denham-trained Watabout, Rawiller's ride in the Australian Turf Club Handicap, will be one of the main chances after a last-start 1100m win at Canterbury.

Rawiller will also ride recent provincial winner Sense Of Play for David Pfieffer and My Highlight for Craig Ritchie.