Originally Posted by
dabac
Hugely unlikely.
You're not saying what wheel size you have. But If its 26" or bigger a 46/11 will get someone with average pedalling technique to about 30 mph or a bit above before spinning out.
Bicycling is more about stamina than strength. General recommendation is to keep a cadence - pedalling pace - of 80-100 rpm.
To put some context behind this, 30mph is equivalent to 0.5 miles/minute or 2640 feet per minute.
In an ideal world, a 46/11 ratio means notionally that every revolution of your crankset in that gear means the wheel will rotate 4.18 times, and the linear distance it will roll will be approximately 2100mm times 4.18 (or 8782mm, or 28.8 feet.
Now, you can divide the 2640 feet per minute you want to go by the feet per revolution your gear ratio sends you, to estimate that you need 91 and change revolutions per minute of your crank to go 30 miles per hour.
In reality, this doesn't work quite so well due to mechanical and environmental losses in the system, but it's a rough idea.
Also in reality, it's quite hard for a lot of people to pedal a bike at that gear ratio with an RPM of 90.