Last month I switched from Hero Octane DTB1 to TREK 3700 Mountain Bike. TREK 3700
Price - 13500/-
Frame size - 18"
Wheel Diameter - 26"
Suspension - Front RST 191 63mm travel
Gears - 21 speed Shimano Aera
Shifters - Easy fire
The feel of the bike is great. The gears shift much quicker as compared to Octane. The gear ratios are real good, can take climbs at great ease.