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Offline colombo

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Previous owner put in EIBACH read Spring
« on: June 29, 2018, 07:56:45 AM »
So like the title says,  I inherited a bike with an EIBACH rear spring with the following stats:

The humber  0700-225-0750 is stamped on the spring, and from reading forum threads, should mean:

    0700 means the free height , 7 inch.
    225 means inner diameter. , 2.25 inch
    0750 means the spring rate , 750 lbs per inch

So if this is right, is this set super tight on the shock for tracking purposes, or rider weight purposes?

And what rider weight range does 750 pbs per inch of rate translate to?

Offline Ali-bear

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Re: Previous owner put in EIBACH read Spring
« Reply #1 on: June 29, 2018, 12:18:41 PM »
According to https://www.convertunits.com/from/pound/inch/to/N/mm that is 131 N/mm and very stiff.

Offline colombo

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Re: Previous owner put in EIBACH read Spring
« Reply #2 on: June 29, 2018, 12:46:21 PM »
*Originally Posted by Ali-bear [+]
According to https://www.convertunits.com/from/pound/inch/to/N/mm that is 131 N/mm and very stiff.


I weigh 190lb, or more like 210lb with gear (15 stone).   I really have no idea if that spring is too stiff for me.   If so I'll have the shop swap it out.   Is there a guide or something somewhere that maps weight to shock spring rate?

I also found the following:

Stock = 12.6 kg/mm
Mine  = 13.36 kg/mm
« Last Edit: June 29, 2018, 01:10:19 PM by colombo »

Offline Ali-bear

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Re: Previous owner put in EIBACH read Spring
« Reply #3 on: June 29, 2018, 04:17:39 PM »
It depends on the linkage geometry and the leverage ratio, and I don't know what the stock 675 spring is.
At your weight you should be OK with the stock spring and maybe some preload adjustment. Then again the one you have fitted is not a huge difference from stock its only 6% stiffer.
Best if you can measure your sag to see where you are before making any changes.
By the way, 1 kg = 9.81 N

Offline colombo

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Re: Previous owner put in EIBACH read Spring
« Reply #4 on: June 29, 2018, 04:35:13 PM »
Yeah I guess setting sag is the surest way to tell...

Offline gosling 1

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Re: Previous owner put in EIBACH read Spring
« Reply #5 on: June 29, 2018, 06:09:20 PM »
Race Tech have a spring rate calculator on their website. But for some reason the applications chart only lists 2009-2010 and 2013-2016 for the Street Triple R's, not sure why there are gaps in the model years. :027: Tried 190 lbs. without gear for both and got the same rear spring recommendation of 11.6kg/mm. (for the street). They list the '09-'10 stock rate, like you said, @ 12.6kg/mm and the '13-'16 STR @11.2kg/mm.

http://racetech.com/ChooseVehicle.aspx

By the way, is this Eibach spring on a stock shock? Reason I ask is that I have seen Penske shocks come with Eibach (red) and Hyperco (blue) springs.
« Last Edit: June 29, 2018, 06:23:26 PM by gosling 1 »
2014 Street Triple R
2008 Tiger 1050
2011 Suzuki DR-Z400S

Offline colombo

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Re: Previous owner put in EIBACH read Spring
« Reply #6 on: June 29, 2018, 11:22:17 PM »
*Originally Posted by gosling 1 [+]
Race Tech have a spring rate calculator on their website. But for some reason the applications chart only lists 2009-2010 and 2013-2016 for the Street Triple R's, not sure why there are gaps in the model years. :027: Tried 190 lbs. without gear for both and got the same rear spring recommendation of 11.6kg/mm. (for the street). They list the '09-'10 stock rate, like you said, @ 12.6kg/mm and the '13-'16 STR @11.2kg/mm.

http://racetech.com/ChooseVehicle.aspx

By the way, is this Eibach spring on a stock shock? Reason I ask is that I have seen Penske shocks come with Eibach (red) and Hyperco (blue) springs.

Awesome, thanks for the link. 

Offline JanM

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Re: Previous owner put in EIBACH read Spring
« Reply #7 on: June 30, 2018, 10:25:16 AM »
130 N/mm or 750 lbs/in would be very stiff, usually around 110 N/mm or 625 lbs/in for a 200 lb rider - depending on shock setup, linkage and front end setup.

 


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