WATCH OUT BOYS!
tried a 'big' hot lap from mosman, round the dam and back to mosman.
wanted to break the hour and did it in about 58.30, pressed the lap button on the garmin when i reached the dam loop and ended up with 28.35 on my return to the same spot.
not bad for a 40 year old ex smoker. i know there's room for improvement and i'll try it on a hardtail early next year.