Kirtap

Is there really any difference between RS-R downs for the F-sport models and the downs for the non F-sport models? According to RS-R's chart, the springs for the non F-sport model gives significantly less drop than the springs for the F-sport model.
I have a non F-sport. Would there be any problems if I got the downs for the F-sport model? Would they fit?

Thanks!

Pittsy

Not sure on the compatibility, but If I were you, just go with the RSR Downs that are compatible with your non fsport. I had RSR Downs on my base model 3IS and it looked great, with stock wheels I had a tiny wheel gap, compared to the stock 1.5-2" of wheel gap.

Meraki Autoworks

iTrader: (8)

Nope, you'd be fine! The regular RSR down springs for your car!

-Josh

Kirtap

Thanks Josh! I wonder why they list them separately....

Follow-up question, some of their springs are listed as compatible with years from 2013-09.2016 and some are from 10.2016 and onward. Is there really any difference? I got the impression that there's only cosmetic differences after the facelift?

Edit: The rear spring rate is listed as 8.67kg/mm for the older models and 8.98kg/mm for the newer ones. Do those 0,31kg/mm matter all that much?

TOPENDMS

If it didn't matter, they wouldn't make it. Let RS-R figure out the engineering.

Kirtap

Thank you for that in-depth explanation. It really helped me!

AtomicAWD

It's hard to really compare springs simply by specifications because spring rate and length are only two attributes. There's also the diameter of the coils and the composition of the coils itself as well as other factors. Even within the RS-R models, we might expect that they'd use the same base materials but their spring rates do not directly correspond with their published drop specifications, which is why a number of us are essentially experimenting to find out what works in real life.

Meraki Autoworks

iTrader: (8)

Theres probably some added weight or dropped weight somewhere which is why they're different.

-Josh

Kirtap

Thank you! This is the kind of reply I wanted. I've been in contact with RS-R USA and they in their turn directed me to their european vendors. I hope to hear from them soon regarding wether or not the springs for the F-sport 300h will work on my non F-sport.
Regardless what they say I feel like I might do just that, experiment and see what works in real life.

Yes, I understand that, I do however wonder how much of a difference it makes. If it just makes the ride a bit softer/harder or if they simply just don't work on the "wrong" car.

AtomicAWD

Some of the research we've done is on parts sites like https://www.mylparts.com/. There, you can compare suspension parts of different models to see the part numbers and determine if they're the same. In some cases, the springs were different between AWD and RWD, and in other cases there were differences between F-Sport and non. The main thing would be whether they physically fit, which from 2014-2017 at least they all seem to across the board.

mrmle03

iTrader: (1)

Can't go wrong with RSR Down - perfect drop if you want to get rid of most of the wheel gap and rides like oem.

AtomicAWD

For RWD...

Kirtap

Thanks man! I'll make sure to check that out!

Kirtap

So after a few weeks of research, I finally got this statement from RS-R Japan: