Can anybody decipher the #'s on these to give me spring rates?

[Ductard]

Had 2 spring swaps done on my Ohlins cartridges, by different shops.

One was an Ohlins dealer, the other was not...so I figure one of these is definitely an Ohlins spring (not sure which of the two) but the other may or may not be.

I started with 11.0's in the cartridges, and I thought each shop put 10.5's in, but I don't see 10.5 anywhere.

Anything else that can be deciphered (length, brand, etc.) would be awesome too.

For anybody who can't open the pictures here's what I think they say:
04744-05/L1014
04744-10/L2214

[SwiftTone]

Ohlins Spring Decoder - Ducati.ms - The Ultimate Ducati Forum

[Ductard]

Ohlins Spring Decoder - Ducati.ms - The Ultimate Ducati Forum

Hmmmm....according to this the spring rate would be identified by -05 and by -10, which would be 42N/mm or 4.28 Kg/mm and 52N/mm or 5.30Kg/mm...

...which is well outside of the range of what these could possibly be (somewhere between 11.0 and 10.0 Kg/mm if I'm not mistaken...)

[carsick]

Hmmmm....according to this the spring rate would be identified by -05 and by -10, which would be 42N/mm or 4.28 Kg/mm and 52N/mm or 5.30Kg/mm...

...which is well outside of the range of what these could possibly be (somewhere between 11.0 and 10.0 Kg/mm if I'm not mistaken...)

Uh, I hope you mean 1.0 and 1.1 kg/mm. Fork springs have a low rate as there are two of them and no linkage to provide leverage like a swingarm.

[Ductard]

Uh, I hope you mean 1.0 and 1.1 kg/mm. Fork springs have a low rate as there are two of them and no linkage to provide leverage like a swingarm.

I get confused by the units on this stuff. Spring rate is listed as 11.0 on my invoice from Dan Kyle Racing (excerpt below: which lists the units for the rear spring but conveniently leaves units off for the front springs). All the suspension guys I've spoken to are referring to front spring rates as 10.0, 10.5, or 11.0.


Invoice excerpt:
Ohlins TTX 36 GP Shock and 30 MM NIXcartridge Kit Ducati 1199 Panigale2012-14 Shock spring 105 Nmm cartkit springs 11.0/11.0

[carsick]

Must be a Ducati thing. Try doing the math, 1kg=2.2lb, 1 inch=25.4 mm. Sooo, 11 kg=24.2 lb, multiply that by 25.4mm and your spring rate would be 615lb/in. Per spring. Given that there are two, and guessing that the rear suspension takes half the weight, and allowing for no preload, you and the bike would compress those forks about 1/4 inch.
Most talk of fork spring rates I've heard (and I don't hang with suspension guys) is something like a ninety five, or a one-oh-five, indicating respectively a 0.95 or 1.05 kg/mm spring, common in a sporty type track bike.
And for the price of those cartridges, you should get a man from the factory to take care of everything for you. Only peasants need to understand how things actually work.

[Kurlon]

I think you guys are crossing N/mm with kg/mm... factor of 10 diff between the two would 'splain the confusion.

10N/mm == 1.02 kg/mm == 57lb/in

Cheater calc: NorWest Suspension

[carsick]

What would we do without you? Nobody has answered the OP's question, but the info in post #3 would have kept me from rambling on, had I read it fully.

[gmdboston]

Ohlins use Newton meters for the spring rates. It is the proper metric force unit. The 04744- denotes a 36mm OD x 260mm Length spring. The -# is the last two digits of the rates. You have a 10 N/m and a 10.5 N/m spring. the are close to a 1.0 kg/mm and 1.05 Kg/mm Actual rates are 1.02 Kg/mm and 1.07 Kg/mm. When used in parallel, you get the average of the two, 10.25 N/m or 1.0450 kg/mm