Ride height - possibly dumb question
11-22-2018, 11:54 PM
#1
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Ride height - possibly dumb question
I’ve read a bunch of threads on ride height comparing different models. What I can’t figure out is where it is measured. Is there a datum somewhere that everyone knows about? Or is it as simple as “from the ground to the center of the wheel?” Or fender lip. Or something... All help appreciated.
11-23-2018, 12:29 AM
#2
Have a look at my thread called lowering help. Im installing lowering springs at the end of January.
Helpful people have uploaded the datum points on there. The ground to centre of wheel measurement will always be the same and measuring from the ground to the wheel arches will be inaccurate as all cars (could) be slightly different.
Hope this helps
Helpful people have uploaded the datum points on there. The ground to centre of wheel measurement will always be the same and measuring from the ground to the wheel arches will be inaccurate as all cars (could) be slightly different.
Hope this helps
11-23-2018, 05:51 AM
#3
I’ve read a bunch of threads on ride height comparing different models. What I can’t figure out is where it is measured. Is there a datum somewhere that everyone knows about? Or is it as simple as “from the ground to the center of the wheel?” Or fender lip. Or something... All help appreciated.
11-23-2018, 12:45 PM
#5
Racer
So when folks reference RS +1 or whatever, what are they actually referencing? Lol.
I always measure from ground to top of wheel arch. Make sure that both fronts match and both rears match.
I keep track of number of turns of the coil over perches too.
additionally, I measure after making a change then again after driving it around the block once.
I always measure from ground to top of wheel arch. Make sure that both fronts match and both rears match.
I keep track of number of turns of the coil over perches too.
additionally, I measure after making a change then again after driving it around the block once.
11-23-2018, 02:31 PM
#7
Drifting
Some coilover companies use this method to give you the +/- range but it is hard to be accurate since you are eyeballing the center of the cap. To make sure I was within KW's specs, I hooked my tape measure on the bottom lip of the wheel, measured to the fender, and then subtracted the radius. This is much more accurate IMO.
^^^ This thread linked by Jason shows the proper measuring points. I made a couple threaded rod tools (1 for front and 1 for rear), and used them to set my ride height. Once done, I then confirmed I was within KW's range by using my method above.
There are some photos showing the location(s) and a threaded rod "tool" in THIS thread.
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11-23-2018, 02:53 PM
#8
Rennlist Member
Some coilover companies use this method to give you the +/- range but it is hard to be accurate since you are eyeballing the center of the cap. To make sure I was within KW's specs, I hooked my tape measure on the bottom lip of the wheel, measured to the fender, and then subtracted the radius. This is much more accurate IMO.
Mr. Wolfe
11-24-2018, 03:15 AM
#9
US, ROW, and RS ride heights are all measured from the points specified in Jason's link. So US front spec is 175 mm, ROW is 165mm and RS is 125mm. RS + is the mm added to the 125 mm front RS spec and 223mm rear RS spec. E.g., RS+15 is 140mm front and 238mm rear.