What warranty length actually tells you
A 1-year warranty means the brand expects 1-year-old bikes to break. A 5-year warranty means they've engineered for it. Most e-bike warranties are 2 years on motor/battery and either 'lifetime' or 5 years on the frame.
But length isn't the whole story. We built a 5-year battery/frame warranty into our own brand because our dealer network could honor it locally. A 5-year warranty from a DTC brand with no service network means 'ship the bike back to us at your cost, wait 6 weeks, hope.'
The serviceability score we use
On every review, we grade four things separately: (1) parts availability — can you actually buy a replacement controller in year 4? (2) warranty reality — what % of claims actually get paid? (3) dealer access — is there a shop within 30 minutes that knows the bike? (4) DIY-friendliness — standard tools or proprietary?
Most affiliate sites skip this entirely. We won't, because we know what the next 5 years of ownership actually looks like.
Red flags we've seen up close
Proprietary battery shapes (when the brand stops making them, your bike is dead).
Sealed controller boxes (no diagnostic port = no troubleshooting).
Warranty 'administered by' a third party (this almost always means denied claims).
No published parts catalog (if you can't find it on the website, you can't buy it).
"We've sat across the desk from customers crying because their $5,000 bike was a paperweight and the brand wouldn't return their calls. That experience is why we grade warranties the way we do."