The bike came back to us and the battery put on test with the same results as the other batteries in these cases. All delivered their designed capacity! So, we carried out the remedial action and the owner came the 40 miles and collected her bike. Later, she reported that it is going fine now.
And what was the remedy? We pumped up the tyres.
The recommended tyre pressures for the Axcess Mustang, Hunter, Exmoor and Shetland is 45 – 60psi. For the 700c wheeled Eriskay and Camargue it is 55 -80psi. Although it is often hard to find, the recommended pressures are embossed on the wall of tyres.
A tyre which feels soft when it is squeezed between thumb and fore finger is probably less than 20psi, while a tyre at 25 psi can feel quite hard. To get the best out of an electric bike and its battery, you need to use a gauge to ensure the tyres are sufficiently inflated. The bike really feels more lively when the tyres are inflated to the maximum recommended pressure. Underinflated tyres increase the rolling resistance of the bike. That is, quite simply, that it just takes more power to propel the bike along at a given speed.
Take care if you use the garage forecourt air line to inflate bike tyres as they are very powerful and deliver a great deal of air. 12 Volt car accessory pumps, foot pumps and bike style stirrup pumps can all be used. Perhaps the most important feature is that the pump is fitted with a manometer (pressure gauge.) The little hand pumps are the most difficult to use and are probably best left for roadside emergencies.
So, pump up the tyres to get the best performance and range out of the battery.