Apparently the extra width gives about 10% less aero drag*.
Absolute worst-case scenario where that was the ONLY range factor, adding that drag back by narrowing it for EU-approval would still mean a 900 mile range:
100kWh: 900mi (1,448km)
60kWh: 540mi
40kWh: 360mi
25kWh: 225mi (over FIVE TIMES the US avg. daily drive)
It would still recharge faster than ANY other car, at 36mi/day on solar, 117 miles overnight from a wall outlet, 56 miles per hour** on L2, & 450 miles per hour at its tiny 50kW DC limit.
* Aptera FAQ says the extra-wide front track reduced drag by "more than 10%" (lines 417 & 420 at time of writing. Line numbers change when they delete lines above as they've done before.)
**28 miles per hour IF it ends up with a half-sized 3.3kW limit, but that's still faster than any other car.
I'm sure it's an engineering challenge but I've seen other examples of cars were the wheels would pull into narrow the width when at reduced speeds in urban settings. This would be a good idea for Aptera.