ST Suspensions Sporttech Springs - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

kuangxtc · 12-09-2016, 06:11 AM

Hey guys, I've searched ft86 forums and google, but 'ST' just won't show up in the search results, it's too short. With that said, does anyone have any experience with these lowering springs? They're made by ST, so I'm sure they're really good for the money. I'm searching for a spring that will work well with the stock struts and not blow them out prematurely, similar to how the RCE Yellow Springs are built for oem struts but the ST's are less expensive.

http://www.ft86speedfactory.com/st-s...rings-872.html

Tor · 12-09-2016, 08:59 AM

I have no first hand knowledge just trying to help you out.

They have German TÜV which means they are street legal in Germany. Documentation is required for that:
http://docs.kwsuspension.de/ga56045-1201-12.pdf

From the documentation, it says they have a progressive spring rate and uses the stock bump stops.

Given that they are street legal and the authorities here are pretty rigorous they probably won't blow your shocks. If they work well is another matter...

wparsons · 12-09-2016, 10:06 AM

What are you hoping to get out of the springs?

kuangxtc · 12-09-2016, 01:57 PM

Quote:

"I have no first hand knowledge just trying to help you out.

They have German TÜV which means they are street legal in Germany. Documentation is required for that:
http://docs.kwsuspension.de/ga56045-1201-12.pdf

From the documentation, it says they have a progressive spring rate and uses the stock bump stops.

Given that they are street legal and the authorities here are pretty rigorous they probably won't blow your shocks. If they work well is another matter... "

Thanks for the info!

Quote:

What are you hoping to get out of the springs?

I only daily drive the car and want to minimize the wheel gap, but I wan't to keep the oem struts. I'm looking for a spring that was designed to be used with the oem struts and won't blow them out after a couple thousand miles. I did some research and the RCE yellows meet my criteria, but I can get the ST springs considerably cheaper (~$170 cheaper) so if they are high quality and lower my car without blowing out the struts, I'd be really happy.

Clipdat · 12-09-2016, 02:10 PM

IMO, save up for the RCE Yellows.

Quote:

Originally Posted by kuangxtc

Thanks for the info!

I only daily drive the car and want to minimize the wheel gap, but I wan't to keep the oem struts. I'm looking for a spring that was designed to be used with the oem struts and won't blow them out after a couple thousand miles. I did some research and the RCE yellows meet my criteria, but I can get the ST springs considerably cheaper (~$170 cheaper) so if they are high quality and lower my car without blowing out the struts, I'd be really happy.

wparsons · 12-09-2016, 03:12 PM

If you're not really pushing the car at all, and don't care what the handling balance (from spring rates) is like, then these should be fine. I'd personally go with the RCE Yellows or Swift Sport (I have swift sport FRS rates).

As for the costs... the ST's are only ~$70 cheaper, not $170. ($232 vs $299)

http://www.ft86speedfactory.com/race...rings-475.html

8R6 · 12-09-2016, 03:48 PM

Hotchkis springs are awesome for the money too and work well with the stock shocks

finch1750 · 12-09-2016, 04:26 PM

Another vote for RCE yellows. I have no first hand knowledge of the ST springs but the Yellows are worth it.

kuangxtc · 12-09-2016, 05:31 PM

Quote:

If you're not really pushing the car at all, and don't care what the handling balance (from spring rates) is like, then these should be fine. I'd personally go with the RCE Yellows or Swift Sport (I have swift sport FRS rates).

As for the costs... the ST's are only ~$70 cheaper, not $170. ($232 vs $299)

http://www.ft86speedfactory.com/race...rings-475.html

The only reason I'm considering is because of how well recieved their coilovers are and there's open box, but brand new set of ST springs I can get for $130.

I'll try to do some more research but the overwhelming consensus of ft86 is RCE's

Thanks!

solidONE · 12-09-2016, 05:52 PM

Doesn't look like they publish the spring rates. If the rates are good I'd be all over them for $130 for a new set. While ST is a reputable brand, I'd be a bit wary of suspension manufactures that don't disclose the specifics like spring rates. I suppose you can ask the customer service, but how can you be sure short of testing it yourself?

http://www.stsuspensions.com/st-susp...brz-65820.html

kuangxtc · 12-09-2016, 06:05 PM

Just called KW and they said the springs are progressive and don't have a rate and blatantly said these springs would be bad for OEM struts. Looks like I'm going with RCE's baby!

solidONE · 12-09-2016, 06:34 PM

Quote:

Originally Posted by kuangxtc

Just called KW and they said the springs are progressive and don't have a rate and blatantly said these springs would be bad for OEM struts. Looks like I'm going with RCE's baby!

Progressive springs also have spring rates. Take these Eibachs, for instance.

Spring Rate Front: 148-200-371lbs/in (Progressive)
Spring Rate Rear: 103-274-388lbs/in (Progressive)

https://www.rallysportdirect.com/par...wering-springs

Lynxis · 12-10-2016, 12:29 AM

Was going to suggest maybe looking at Eibach Pro kit. The TRD springs are literally just rebadged versions of the pro kits so they shouldn't cause any issues with premature wear on stock struts.

Stats pulled directly from another thread:

Product: Eibach Pro-Kit Lowering Springs
Front: claimed 1.0" vs actual 7/8" (rate: 3.6kg/mm)
Rear: claimed 1.0" vs actual 7/8" (rate: 4.9kg/mm)
Part No: 8210.5.140
MSRP: $359

D_Thissen · 12-10-2016, 12:38 AM

Another vote for RCE yellows

12-09-2016, 06:11 AM	#1
kuangxtc Member Join Date: Jun 2016 Drives: 2013 DGM BRZ Limited Location: Oregon Posts: 21 Thanks: 3 Thanked 2 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	ST Suspensions Sporttech Springs Hey guys, I've searched ft86 forums and google, but 'ST' just won't show up in the search results, it's too short. With that said, does anyone have any experience with these lowering springs? They're made by ST, so I'm sure they're really good for the money. I'm searching for a spring that will work well with the stock struts and not blow them out prematurely, similar to how the RCE Yellow Springs are built for oem struts but the ST's are less expensive. http://www.ft86speedfactory.com/st-s...rings-872.html

12-09-2016, 08:59 AM	#2
Tor Senior Member Join Date: Feb 2015 Drives: Toyota GT86 Location: Europe Posts: 919 Thanks: 369 Thanked 554 Times in 301 Posts Mentioned: 40 Post(s) Tagged: 2 Thread(s)	I have no first hand knowledge just trying to help you out. They have German TÜV which means they are street legal in Germany. Documentation is required for that: http://docs.kwsuspension.de/ga56045-1201-12.pdf From the documentation, it says they have a progressive spring rate and uses the stock bump stops. Given that they are street legal and the authorities here are pretty rigorous they probably won't blow your shocks. If they work well is another matter... __________________ Build: T(h)or's GT86 hammer (Europe) - essential track setup Youtube: GT86 dude Last edited by Tor; 12-09-2016 at 09:34 AM.

12-09-2016, 03:48 PM	#7
8R6 Senior Member Join Date: Jan 2014 Drives: FRS Location: SoCal Posts: 2,086 Thanks: 2,738 Thanked 1,338 Times in 746 Posts Mentioned: 30 Post(s) Tagged: 2 Thread(s)	Hotchkis springs are awesome for the money too and work well with the stock shocks __________________ Team BRG inspire-usa My car build #8R6

12-09-2016, 04:26 PM	#8
finch1750 Undisputed El Presidente Join Date: Jun 2012 Drives: Zenki 37J ZN6 Location: Stockton, CA Posts: 11,571 Thanks: 9,382 Thanked 9,397 Times in 5,261 Posts Mentioned: 374 Post(s) Tagged: 33 Thread(s)	Another vote for RCE yellows. I have no first hand knowledge of the ST springs but the Yellows are worth it. __________________ "Just like how a strut bar somehow enables you to corner 20MPH faster around a cloverleaf on-ramp, when the reality is, you can do it already but you just don't have to balls to do it." - CSG David

12-09-2016, 05:52 PM	#10
solidONE Senior Member Join Date: Dec 2012 Drives: FR-S Whiteout Location: California Posts: 2,863 Thanks: 1,808 Thanked 790 Times in 611 Posts Mentioned: 42 Post(s) Tagged: 0 Thread(s)	Doesn't look like they publish the spring rates. If the rates are good I'd be all over them for $130 for a new set. While ST is a reputable brand, I'd be a bit wary of suspension manufactures that don't disclose the specifics like spring rates. I suppose you can ask the customer service, but how can you be sure short of testing it yourself? http://www.stsuspensions.com/st-susp...brz-65820.html __________________ Intent > Content cowardice is the mother of cruelty.

12-09-2016, 06:05 PM	#11
kuangxtc Member Join Date: Jun 2016 Drives: 2013 DGM BRZ Limited Location: Oregon Posts: 21 Thanks: 3 Thanked 2 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Just called KW and they said the springs are progressive and don't have a rate and blatantly said these springs would be bad for OEM struts. Looks like I'm going with RCE's baby!

12-10-2016, 12:38 AM	#14
D_Thissen Senior Member Join Date: Jan 2014 Drives: '13 Argento FR-S (Sold) Location: Ontario Posts: 2,126 Thanks: 3,209 Thanked 1,439 Times in 855 Posts Mentioned: 19 Post(s) Tagged: 2 Thread(s)	Another vote for RCE yellows __________________ My FR-S Build IG: dthissen

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