its a mountain bike and it still slow
Well if you're still pedaling fast and it seems as if it's not going... I'd check out the chain on your bike and maybe grease it a little! That'll do the trick :)
As well as the weight of the bike. The lighter the bike the faster it will go. If it was a convenience store cheap bike it just won't go as fast.
there might be some problem with ur engine...........just send it for a service.......then it will be again ready to zip the road
It has adjusting numbers on the handles if it's a moutain bike, so adjust them to an easier level.
there must be a gear shifting problem.... change ur gears at leat when ur rpm reaches 6 or 6.5
The speed of your bike is relative to your ability to pedal it.
maybe it's set at a low gear