AlanfromBigEasy wrote: ↑
Sat May 15, 2021 7:53 pm
I bought a used 2015 BMW i3 REx, now with 36,000 miles of moderate driving by me. The rear tires need to be replaced due to excessive wear on the outside edge of each. Middle grooves of the rear tires are still OK but worn.
Is this a common issue ? Is this bad rear end alignment ? Or any comments.
In old bias-ply tires, under inflation resulted in increased wear on the edges relative to the center. This problem doesn't seem to be as serious with radial-ply tires, but it might still exist to a lesser extent. I've been inflating the tires on our i3 to 10 psi over the recommended inflation pressure and have been checking tread depths on both edges and the center over time. The wear has been even across the tread. However, the right rear tire has been wearing faster than the left rear tire which seems to be a common occurrence for i3's. I've been rotating the tires side-to-side to combat this wear pattern.
The rear camber of an i3 tilts the top of the tire inward compared with the bottom (negative camber). This tends to wear the inside edges faster which isn't helped by the new tread depth of an i3's Bridgestone tires being less on the inside edge compared with the center. With greater wear on the outside edges, I would definitely have the rear alignment checked.
2014 BMW i3 Arravani Grey, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, JuiceBox EVSE