22/10/2025
eBike-motor longevity Tip of the Week Number 9: One drop of water!
Chronic motor failure is often a cascading event! Starting slowly and usually taking 3 to 5 months, depending on your average mileage.
A small issue can lead to major problems if left unchecked. Here’s a common real-world scenario:
1. Your eBike motor gets wet, maybe from deep water fording, a post-ride wash, or while it’s strapped to the car rack and transported on wet roads.
2. You store it away, but a tiny bit of water finds its way into a motor bearing.
3. Over time, rust begins to form between the ball bearings and the race. This is the beginning of the end.
4. Weeks (or months) later, you roll the bike backwards and may feel the crank is stuck, or a click as it releases… a subtle but serious warning sign. At this point, corrosion has started damaging the bearing surface.
5. From here, each ride adds to the wear. The ball bearings degrade, and the pitted race accelerates damage.
6. Due to their small size, the ball bearings experience accelerated wear. This wear introduces play that can unseat the bearing seals, permitting water and or contaminants to enter the motor causing premature failure.
Tip: Keep your eBike dry and regularly inspected, especially after wet conditions.
For more insights, check out our full eBike Longevity Tip of the Week series!
Ring us on 01425 656 656 if you need advice or a health check.