I have a Carerra Subway 2 from Halfords, been using it on and off for about 3 years. 2 days per week about 10.5 miles one way to the office. I find it hard to do a third day and am looking for options to either upgrade my bike or replace. I'm looking for less effort, to travel the 10 miles, hopefully allowing me to go for the third or even forth day. Can I do anything to my existing bike or replace it. I have seen then ridgeback ultra flight 3?