OMG! I hope they don't. Everything about the car is designed around the tyres it come with. I don't suppose it would be at all safe. It would certainly constitute a modification and so unless you inform you insurance it might invalidate it.
Some reviewers in the US did the opposite and fitted slicks they found it could pull the same g in a corner as a porsche due to the low centre of mass.
hi I posted similar question
I discovered 1. that fatter tyres roll better than thin as thin ones squash out flat anyway
2. Its not easy to find a tyre place to fit thinner tyres they only will fit same size
3. the weight of the car is approx1800kg where a BMW i3 is 1400
so I am going to stick to the same size 205 x55x16
I've not found wheelspin to be a problem at all, and I drive mine hard (no range worries).
Assuming you're at correct pressures, it can only be the brand/type you're using.
Simply changing tyres can transform a car from a wheelspinning mess to perfectly fine.
My Alpina was a mess on Michelin Pilot sport, could be floored even in low gears on Falken.
My concern would be around braking distance, the leaf is relatively heavy, so fitting a tyre which reduced the contact patch to the road would affect braking distance, especially in adverse weather conditions, so you may save a few pence in electricity, but may cost you a lot more if you cause an accident.
Realistically, how many more miles would you gain doing this?
Compared with the potential insurance costs because you've deviated from standard?
This is the kind of 'hyper-miling' that just baffles me....
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