Ive been riding a year now and I am doing 200+mile weeks now and I feel ive hit a peak, I can average between 17mph and 18mph city riding, lately ive decreased to below 17mph, I have no idea why im not improving, I have been putting in more hill climbs but I dont like being under 17mph. If I am out on country roads I can easily average 19-20mph over long distances solo riding. Any advice is appreciated to improve