Spring rate?
 

So just got my Penske shock rebuilt by a race buddy at the track. He mentioned how strong a spring the shock had. It is a 950lb shock. I remember putting it on since I was always riding 2 up with 3pc luggage.

What are you guys running? I am @ 190lbs.

Oem still, 38 psi rear iirc.

In the front I reduced the air gap by 10mm and used Honda brand 10 weight oil. It's nice combo Steering damper too. I'm 180 ish these days, probably 190 with some gear on.

Hows that oil leak? Any luck?

Oil leak? Anyone know stock spring rate? Been riding it in the time the Penske was built, seems super soft.

Belay me last, mixed up my users again...

AV

Hmm.

So not hearing a lot of support for spring rate info.

Ready?......GO

Right,got carried away...

Unfortunately everyone I know goes through a painful process of trial and error. All swear that the calculators are wrong and largely a waste of time. Having an extra spring or two laying around cant hurt though, maybe someone on here will buy it.

Yeah, I have 2 spares but they don't have the spring rate on them. One is from an RC31 but I have yet to track down what the weight of that bikes spring is.
The other is unknown but I think its close as I got them for the VTR way back when.

Stock Spring Rate:16.4 kg/mm (916lbs/in)

Erik thanks,
So my 950lb spring should not be too far off for a 190lb rider?

Springs support weight....if you can get proper sag with that spring.. and your shock tune controls that spring, you have the right spring

Shameless plug for Cogent Dynamics. https://www.motocd.com . Rick has set up my race bikes, street bikes and dual sport bikes for many years. 828.628.9025, raceparts@motocd.com He's great. Tell him I sent you and get charged double!

Dumb question but how do you like your Penske shock?

Its great and transforms the bike. I have one on each of my VTRs and all my race bikes for @ 20yrs now. Had an Ohlins but liked the Penske better.