Hi all, I've been cycling since 2015 and cycle 3 or 4 times a week and my average speed hasn't improved much from when I started around 12mph on a 20 mile loop, now I average around 13.5 mph on the same loop. Yesterday I did a shorter route with less gradients I just manage 13.6mph. Looking at my strava data most of my rides give my watts output of around 145 watts. Yesterday I was looking at a rider stats who I was following his watts output shows 116watts and averaging 15.6 mph on a 34 mile loop. I just want to improve my average speed to 15mph anybody could give me some advice?. Hope it make sense my eng!ish is not the good. Thanks.