Joff wrote: ↑
Fri Sep 17, 2021 7:23 pm
I think they all need higher pressures, but especially the 20 inch rims, as they have less distance to go before the rim bottoms out on a pot hole.
I agree. Since buying our i3 in 2014, I have increased the inflation pressures of our 19" tires by 10 psi over the recommended pressures of 33F/41R. The inflation pressure of the rear tires then matches the maximum inflation pressure embossed on the sidewall of 51 psi. Another advantage is a slightly lower rolling resistance and thus slightly greater range. Disadvantages include a slightly rougher ride and a smaller contact patch which reduces traction a bit. I regularly measure tread depth across the tread's width and haven't measured any unusual tire wear.
Many of us in the 1st generation Honda Insight community increased the inflation pressures of the Bridgestone low rolling resistance tires installed by Honda on our Insights without any negative consequences that I'm aware of. That experience makes me confident in doing so on our i3.
2014 BMW i3 Arravani Grey, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, JuiceBox EVSE