Hello, I have recently purchased a Rad City 5+ commuter and I am looking to change the handlebars to a straighter more aggressive handlebar. Like the ones on the HS 6. Are these bars inter-changable? The current bars are for cruising, not really good fro more aggressive hill climbing. I like to stand up when hill climbing to get more torque and require less battery power/ drain to get up the hills. I live in Victoria on Vancouver island and we have plenty of hills to climb here.