Originally Posted by Geppetto

Thanks Mike. I'll take a look at the AE site. Hopefully, they provide published specifications for their springs.

Maybe someone else can address the importance of spring length???

Originally Posted by Johnny Wishbone

If you have 2 springs rated the same but different lengths they should function the same, as long as the short spring does not compress so much that you run into coil bind issues. (The spring is so compressed that the coils touch and no longer allow for any compression.) Hope thats the answer you where looking for.

Originally Posted by Geppetto

I did a search on this thread looking for information regarding springs (over 20 pages), but I still need help (with springs ).

Questions:

1.) other than Tamiya, which manufacturers springs are a direct fit to my 416x shocks?

2.)I see suggestions referencing 19.5 spring stiffness, but I don't know which springs fit and have that stiffness.

3.)Is spring length important?

Tamiya has Red, Yellow, Blue, and White springs and they are available in "short" and a standard length??? Tamiya has a white spring set with red, yellow, and blue dot indicators. Tamiya has a black set with red, yellow, and blue dot indicators. Tamiya has a milky blue set with red, yellow and blue dot indicators. Are these all basically the same just in different colors?

Is there any advantage to using a short spring over a long spring?

Maybe we just need a tool for measuring spring stiffness.

Originally Posted by M3dreamin2008

HB/hpi springs should fit

Originally Posted by crabboy

Yeah all the guys I run with use HPI springs also the Hara progressive springs also work good.

Rhys

Originally Posted by Mugen10

3rd time post so I guess know one knows the ball bearing size that is used on the diff. outdrives for the 416X.
I know the part number for the tamiya # is 42115 but in the states it is hard to find without ordering.

Originally Posted by M-Technic

10mm inner diameter
15mm outer diameter

Originally Posted by jackdani

hi guys,

just posting here to have some advice...

i m wondering to change my mi4lp race version, which actually is the cheap one, with some good stuff as i started racing at my local track.

tought to go with the upcoming tc6, but now i m really considering even the trf 416...as i have the possibility to purchase it at a very good price.
i'm not sure about this decision, i would like to hear from you who have it, how the car goes and how good is built!
i dont have any information because here in italy this chassis is not so diffused, considering that 90% is xray...

furthermore i dont care about the trf417, becasue it would cost too muchanyway, and i was thinking how the lipo chassis for 416 goes!

if you all can give me a little advice i would br vary thankfull!!

Originally Posted by Bumpy

Having recently changed from a TC5r to the 416x and buying the Tamiya lipo chassis upgrade all I can say is ITS AWESOME!!!!!!!!!! I shaved over a second off my lap times at my local track running 13.5/2.1 prostock Sp running the kit setup in the car. Only thing I changed was going to the HPI PRO4 springs, which is what most of the team drivers run, to pink fronts and silver rears on (low grip) outdoor ashphalt. The build was very good especially compared to the TC5 and the quality was exactly what you would expect (much higher) after spending alot more than other tc's on the market. Realisticly you dont need the 417 as the 416x with lipo chassis upgrade is pretty much a 417 short of a few more refinements.