Ok.. i see all this information on xA spring rates.. but what about for the xB? I couldn't find anything on this subject. So... Can anybody help me out with this information. I need stock ratings to compare to after market spring ratings.

 

no one ever measured i think... but its been passed around the stock spring rates are 160 for all

 

does anybody know for sure?

 

There's a thread floating around with spring rates for aftermarket and OEM springs... can't find it at the moment... but it's out there.

I'll post a link when I find it

 

Found it...

https://www.scionlife.com/forums/viewtopic.php?t=50481

Hope it helps!

 

Crap... no OEM measurements on that chart...

sorry dude

 

damn

 

Stock for the xB is:
Front - 160
Rear - 160

 

yeah that was my thread...
I stopped adding to it await information from various manufacturers...

but they all seem to dislike giving the spring rate information, regard it as unimportant (and therefore won't look it up), or simply don't know what it is.

and yeah hotchkis has always reported that stock spring rates for xB is 160.. its where I got my number from... but lacking any other confirmation, I didn't add it to the chart

 

160 all the way around would seem a bit unbalanced.. but for stock who knows. Thanks guys I'll use that figure to make sure I don't overdo it when I tighten everything up.

 

well the car does seem unbalanced when driving over bumpy roads.

 

According to Scion/Toyota the xB's stock spring rate is F:148 R:160, as a side note the Ist and bB have spring rates of F:125 R:134

 

ashe where/how did you get that info?

 

I'd like to act like I have an "in" to Scion engineering but I dont, just alot of time and google.
http://pressroom.toyota.com/presstxt...5xAxB_tech.pdf
I found it about 6 months ago and with all the good general info in it I added it to my Favorites.

 

wooow dood nice find.. it provides a lot of info on various things...
like:

the exhaust valve that opens around 3k rpms... thats probably why we experience a sudden drone with the stock muffler...

and the big RED X... for the cabin air filter... which they apparently changed their minds on including...

the xA doesn't have brake assist (what is that?), trac and vsc...

turning radius...
gear ratio...

the rear anti-roll bar built into the rear beam...

60% stiffer shocks than jdm or echo...

bB/ist spring rates

our cars have "grade logic"? really?

hmm well i'm gonna include the spring rate info...

 

Don't forget the toe-in bushings in the rear

 

i was gonna post that press article up the other day, but i forgot....sorry...

lots of good info in there....wish they gave that out with the car instead of the owners manual.