Special Rigs for Special Kids was born when he heard about a friend taking children for a ride in a big truck in Britain and he thought the idea could work in Dunedin.
He called on others in the industry and it took six weeks to organise the first event, which attracted 30 children and 120 trucks.
Since then it has grown, with about 250 trucks and 300 children expected to take part in this year's convoy on Sunday, along with thousands who will line the route.
Mr Inch believed part of the reason for its success was the "simple recipe for a simple day".
Trucks and children were not required to be registered for the event beforehand, with invitations sent out to transport companies and families via a hospital database and networks.
As long as there were enough trucks for children and their caregiver to ride in, he was happy.
"We are there to give the kids a ride in a truck. Anything else is just a bonus." A dinner for drivers and an auction also helped fundraise for charities such as the Roxburgh Health Camp and Otago Regional Rescue Helicopter, and supported truck drivers and their families facing hardship.
Trucking companies and drivers offered their time and equipment, while businesses supplied free goods, purely because "they've got a passion for the cause".
"I never call Dunedin a city. It's a community because we are all pretty close," Mr Inch said.
This year, the convoy and after-function, including a free barbecue and entertainment, will be at Forsyth Barr Stadium.
While unsure how much longer he would hold the reins, Mr Inch expected the event would carry on.
"As long as there is a need for it and people get something out of it, we will keep going."
