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Old 02-27-2011, 01:53 AM   #42 (permalink)
Engineering first
bwilson4web's Avatar
Join Date: Mar 2009
Location: Huntsville, AL
Posts: 792

14 i3-REx - '14 BMW i3-REx
Last 3: 45.67 mpg (US)

17 Prime Plus - '17 Toyota Prius Prime Plus
90 day: 58.25 mpg (US)
Thanks: 79
Thanked 196 Times in 126 Posts
I've been tweaking our NHW11, 2003 Prius to achieve four-wheel, near perfect alignment:
  • front camber - use a camber bolt bought from the Toyota parts department.
  • rear toe and camber - use EZ-shim

I have not detected any noticeable change in handling or fuel efficiency. The main advantage is getting all the miles out of the tires.

For handling, my greatest improvement has come using larger diameter, front tires. The larger gyroscopic forces slightly improved straight-line stability ... noticeable on long distance trips.

Bob Wilson

ps. Before EZ-shim, I used metal shims:

Metal shims are used in pairs. One to handle toe on one side and another pair on the opposite side to handle camber. It works but I don't like the unsealed gaps that can accumulate road salt.
2019 Std. Range Plus Model 3 - 134 MPG3 || 2014 BMW i3-REx - 117 MPGe, 39 MPG
JuiceBox 40 Pro (240 VAC, 40 A), KHONS portable (120-240 VAC, 12-32 A)
Retired engineer, Huntsville, AL (five times AutoPilot saved.)

Last edited by bwilson4web; 02-27-2011 at 11:05 AM..
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