I'm not sure if you're understanding the benefit. Your employer can reimburse you for commuting cost for biking up to $20 per month and it will not be added to your income for tax purposes. This isn't something you can decided to do, your employer does it. If your employer is offering this benefit, take it, but it won't be enough to buy an electric bike, it's just compensation for expenses. What you use to bike is immaterial.