She gets around on a 24-gear town bike, with a carrier, two pannier bags and a stretchy to hold parcels down. She doesn't wear the usual high-vis yellow jacket, because it's so overused that a clear blue is now safer.
Mrs Lunn Erstad grew up in Denmark, whose six million people cycle an average of 1.6km a day each. Danish roads have cycle lanes, with kerbs to separate them from pedestrians and vehicles.
This visitor to Whanganui has a driver licence but hasn't driven a car for many years.
"It's so easy to get around by bike and train and bus in Denmark."
She's always been a fit person, and as a physiotherapist knows the importance of getting your pulse rate up for 10 minutes a day. A fast three-kilometre bike ride will do that, she says.
Cycling rather than driving helps the environment and saves money, and it's also more social.
"I see a lot of people that I don't think I would see if I was in my car."
Her family can bike together to the River Traders' market on Saturdays, and she wants her children to know they don't have to start a car to make short trips. Also, she just likes biking.
"It's a big joy. If I'm not going out on the bike during holidays, I miss it."
Riding in Whanganui needs more alertness than riding in Denmark, and she feels "a bit exposed" moving to the middle of busy streets to turn right.
"I'm not frightened of wind or hills but there are streets I won't cross without signals."
Drivers are usually friendly and considerate, however.
"When I make eye contact with people in cars everybody is usually very nice to leave space or raise a hand."
She's happy knowing people are working to make cycling better in Whanganui - with new pathways and more bike racks.
