Angular2 rc.4-5

I have following route configuration.

how can i make any route as default route, so when page get loaded it goes to hello component **without redirecting**.

```
    let routes: RouterConfig = [

                {
                    path: 'hello',
                    component: HelloComponent
                },
                /*{
                    path: '',
                    redirectTo: '/hello',
                    pathMatch: 'full'
                },*/
                {
                    path: 'increment',
                    component: IncComponent
                },{
                    path: 'adder',
                    component: AdditionComponent
                },{
                    path: 'roman',
                    component: RomanComponent
                }
            ];
router.resetConfig(this.routes);

```