There isn't necessarily a definitive answer to this question as it depends on personal preferences and what type of bike you have. If you have a cruiser or a beach cruiser, then putting the basket in front might be the better option so that you can see what's inside of it. On the other hand, if you have a road bike or mountain bike, then putting the basket in back might be better so that it doesn't affect your balance while riding. Ultimately, it's up to you to decide where you want to put your bike basket.