Alcalira wrote:.. they offered to do road force balancing using their Hunter machine ... They then determined that they couldn't do the complete process because the outer lip of our rims is too narrow for the machine's wheel--which is supposed to ride on the lip and read its runout or high spots--to maintain contact. But they were able to run the pressure roller on the tire/wheel assemblies and determined that there were no problems. The left front, they said, was actually perfect, with runout measurement of .0008 and needing no weights.....
Interesting, only the road force test that I get locally only does the roller test on the tire, and the results are displayed in 'Pounds' of force at the tread of the tire.
I put some FRS wheels and tires on a '10 Prius I had and one of them measured 23 lbs. The tire had a 'lump'. They said that one goes on the rear and 'maybe' I won't feel it. And yet it was balanced.
Road Force measures tire defects. Tires can be made out of round. I know they didn't try to directly measure 'runout' of the rim itself, although it's possible for rims to be bad, (rarely).
Anyway, you are in a perfect situation to swap tire/wheels between two Spark EV's.
Can that be done for a quick test without a TPMS 'relearn'? (I thought I read here that if the front tires are not reporting proper pressure the car will not GO. Is this right?)
'14 Spark EV 2LT w/ DCFC. 91k miles.
'17 Bolt Premier w/ It All! 59k miles.
GM needs Modern Troubleshooting tools for Modern EV's.
3 step Trouble Tree, 1st try, nope, 2nd try / cost $800. 3rd try fixed it.