Don't tell them that. Now everyone is going to use it BIGGER ID LESS MONEY WOW. Seriosly I do not recomend using this type of tubing.DOT stands for department of transportation. This means motor vehicles. That means dot aproved means vehicle aproved. GET IT!!SlammedDime said:The outter diameter is the same, so it will hold just as well... however, the ID, is bigger, which means a smaller sidewall, which means it will burst at lower pressures.