The range figure on your e-bike’s spec sheet is almost certainly wrong — in your favor. Most manufacturers test at low assist on flat terrain in ideal temperatures. Real-world range is typically 40–60% of the advertised figure. Here’s what to actually expect.
Why Advertised Range Is Misleading
A manufacturer claiming “100-mile range” tests at the lowest assist level, on flat ground, with a 150 lb rider, at 70°F, with new components and full battery. Your daily commute has hills, your pack weighs 20 lbs, you prefer high assist, and it’s 35°F. Real-world range for that bike? 45–60 miles. This isn’t deceptive marketing exactly — it’s like car MPG estimates. Just apply the 40–60% rule mentally when shopping.
Real Range by Battery Size
Based on real-world testing at moderate assist (PAS 2–3 of 5), flat to moderate terrain:
250Wh battery: 20–35 miles real-world
400Wh battery: 30–50 miles
500Wh battery: 40–65 miles
625Wh battery: 50–80 miles
750Wh battery: 60–90 miles
Dual battery (1,000–1,200Wh): 80–130 miles
Hills reduce these numbers by 30–50%. Cold weather below 40°F reduces them another 20–30%.
Factors That Drain Range Fastest
Assist level: Running at PAS 5 (max) vs PAS 2 cuts range by 50–60%
Hills: A 5% grade drains 3–4× more than flat ground
Weight: Each additional 20 lbs reduces range by ~10%
Cold: Lithium batteries lose 20–40% capacity below 40°F
Headwind: A 15mph headwind is equivalent to riding uphill continuously
Tire pressure: Underinflated tires by 10 PSI cost 5–8% range
How to Maximize Your Range
• Use lower assist levels when you don’t need the boost (flat sections, tailwinds)
• Shift to lower gears on hills to let the motor work efficiently (especially mid-drives)
• Keep tire pressure at the recommended PSI — check weekly
• Pre-warm the battery in cold weather (store indoors, bring inside overnight)
• Avoid full throttle launches — gradual acceleration from stops saves significant energy
Battery Longevity: How Long Does It Last?
A quality LiFePO4 battery (found on most $1,500+ bikes) retains 80% capacity after 500–1,000 full charge cycles. At one charge per day, that’s 2–3 years before you notice meaningful range reduction. After 1,000 cycles, you might have 70% of original range — still very usable. Budget lithium batteries (cheaper bikes) may show significant degradation after 300–400 cycles.
Conclusion
Plan for 60% of advertised range on your real rides, and you’ll never be stranded. Keep your battery at 20–80% for daily use, store it warm in winter, and a quality e-bike battery will easily last 5+ years of regular riding.