I am fascinated that you actually had a wonderful time with your Hero Xtreme. The bike is extremely good, and one of the best products taken out by the company. However, the additional fitting is mainly to make sure that the ladies travelling with draped Saris do not get them entangled in the spokes of the wheel. So, it is a standard fitting, and yes Rs. 140 may seem outlandish, but it is the price indicated by the company. You would actually spend much more for the safety of the family member travelling at the back of your bike.