Every electric bike on this list is sub $2,000—from urban bikes to cruisers to fat bikes, and even some that reach 28 mph.

The 5th generation Trek Rail+ gets more travel, more drivetrain options, more adjustments, and the latest Bosch motor.

Upgrades will improve shortcomings and help make your bike more suited to your needs and riding conditions. Or maybe you just want it to be a bit more colorful. Whether you want improved performance, ...