The Jumpstart trampoline is intended for children and as such is unable to hold the weight of a 300 lb person.
pretty good they can hold up to 300 pounds
The amount of calories a person burns riding a bike can vary depending on many factors. The geography of the bike ride, the weight of the person, and the speed the ride was done in. It can also vary depending on if you are outside or riding a stationary bike. On average you may burn around 300 calories.
I believe that you should get what ever bike fits you the best. But why only a 300-450? Why not get a bigger bike and ride it carefully.
it is as long as you can get it for under 300.
a 300 liter or bigger tank
about 300 pounds or more my bike was 320 and there bike for 4000 out there and i do bmxing that so cheap for a bmx
it can hold up to 300 lbs
by sturdy if you mean durable,any bike $300+ will probably last a couple years(depending on how hard you ride).