apologies if this has been covered elsewhere . So my Carrera Crossfire is reputedly able to cover 60 mile on a charge ? So how do the makers come to this figure ? I suppose if you were 7 stone and lived in a area with no hills would it be possible ? If the makers used a formula for this assumption would there be any way of inputting different weights and terrain choice to come to a guesstimate for say light medium and heavy ? also terrain easy medium hilly ? The reason I have brought this up is that I am around 16 stone and live in a hilly area , best I can achieve is 46 kilometres = 28.5 miles I was looking to do the coast to coast bike ride and would be limited to distance on 1 battery and having looked on Halfords website the cost of a back up is £400.00 Also my local dealer was telling me my battery needs servicing and I should store the battery indoors during low temperatures Are they making things up because the batteries are not achieving their figures ? Also has anyone achieved anything like the 60 mile range on a crossfire ? PS While I was in Halfords I noticed they had a new E Crossfire mountain bike for £1000.00 it proclaimed the range on that one was 40 miles ( and its the same battery according to the sales guy ?