tandem bicycle : exercise bike more information on fast, distance and time of formation. The more sophisticated you go, there are things such as TotalCalories and fat burned, resistance, heart rate and program mode.
You can also bike with a number of programmed workouts and information storage and compatibility IFIT and interactive disc.
It depends on your personal preferences, choose whether you want to display a simple bike with 10 preset programs and a high-tech computer screen or an Ultra.
It must be remembered that, in general, are more expensive than the bikeadvanced options and are built with superior materials.
Guarantee
Cycling safeguards with a variety of 90-day lifetime warranty on various parts of the bike . For example, parts and labor are covered for 6 months, electronics for one year and the image of a human life. In general a longer warranty is indicative of a Best quality machine.
Last note: It is also important that you decide what you think, using exercise bike. For example, if you’re new to exercise and I’m not sure if you use your exercise bike much, you can save money and go with a more efficient model.
If you’re planning, but a bit of cycling and / or regular exercise, a little ‘more and invest in a machine that will last. find for a premium brand that is very popular and good value for money.
Given these tips when buying training bike is much more likely to be that best fits the training. Good luck! 
