[Mo(n)arch]

So I added some mass to my sprung system

Thus, I need higher springrates for my two coil shocks.

• One is a CCDB 241 (9,5") x 76 (3,0"). I need a 500lbs spring.
• The other one is a Rock shox Super deluxe 210x55. I need a 600lbs spring.

What are considered the lightest springs with the narrowest range of error for spring rate?
Are the nowadays available springs for max 75mm travel compatible with the old imperial 3,0"?
I read good things about H&R springs. What about SAR? Other options?

 

[William42]

Are you looking at Ti or at steel?

for steel springs, the CC vault springs are pretty much as good as it gets - they're light compared to most others (I don't know of any lighter, but maybe somebody out there makes one), and they're among the most accurate to listed spring rates. Fox SLS springs are the other light weight steel springs that should fit no problem, but they tend to be equal to or slightly more weight across most spring rates, and tend to be less accurate to listed rates.

You can usually save around 1/4lb by going to Ti for the mid/large spring rates, but that's a big kid spring so you might save as much as 1/3 of a pound going ti. Can probably pester somebody at Cane Creek into going and throwing one on a scale for you if you're curious about specific grammage.

For the rockshox, they use a larger spring ID/OD and you're looking at either Rockshox springs or MRP springs as far as what will fit, or going to ti. I'm not totally certain what size EXT uses but maybe they're similar?

 

[Mo(n)arch]

Are you looking at Ti or at steel?

for steel springs, the CC vault springs are pretty much as good as it gets - they're light compared to most others (I don't know of any lighter, but maybe somebody out there makes one), and they're among the most accurate to listed spring rates. Fox SLS springs are the other light weight steel springs that should fit no problem, but they tend to be equal to or slightly more weight across most spring rates, and tend to be less accurate to listed rates.

You can usually save around 1/4lb by going to Ti for the mid/large spring rates, but that's a big kid spring so you might save as much as 1/3 of a pound going ti. Can probably pester somebody at Cane Creek into going and throwing one on a scale for you if you're curious about specific grammage.

For the rockshox, they use a larger spring ID/OD and you're looking at either Rockshox springs or MRP springs as far as what will fit, or going to ti. I'm not totally certain what size EXT uses but maybe they're similar?

Thanks, what should I say, I have heavy bones.
Actually I am open for Ti and steel springs, although I am not sure if there are still aftermarket producers which make them for CC and/or Rockshox.
So actually I seek something reasonably light, acurate and available.

Regarding weights teh germans have 8,6 metric tons of parts weighed: https://gewichte.mtb-news.de/
I did find a few weights.
The CC vault 600 x 3,0" weighs 619 grams.
A normal CC spring 500 x 3,0" weighs 738 grams.

H&R springs claim their spring 500 x 75mm weights 376 grams.
So yeah, I am not a weight weenie, but 240grams or half a pound difference has me interested, especially on the enduro!

 

[bullcrew]

Ohlins springs are light as are sls fox and of course ti..
I have all 3 of those along with a bunch of other stuff...to on V10 Ohlins on nomad and trek...550-600 and alot lighter than steel.
The ti I had made from a company overseas and it's pretty damn good .

Accuracy is probably ohlins and sls...

 

[Jm_]

Sucks that Fluid Focus SAR only goes to 65mm....they even have a 700lb-er.

 

[Redwood Mulch Chucker]

The ones made by Eibach (SAR and EXT) are the most accurate. They are also light, but quite short and depending on the shock require a spacer to work, which kills the light weight part. Same ID as RS springs.

MRP Enduro SL springs are light, RS size, and they have a 600x65 option.

Sucks that Fluid Focus SAR only goes to 65mm....they even have a 700lb-er.

SAR has big springs for 75mm/3" stoke, I have one on the DH bike. They go up to 550#.

Fluid Focus, LLC — Super Alloy Racing :: Full service mountain bike suspension service center located in San Diego, CA :: Mountain Bike Suspension Service + Suspension Service Mtb + Mountain Bike Suspension Fork Service + Rockshox Suspension Service + Fox Suspension Service + Mtb Suspension Tuning + Custom Mtb Suspension Tuning + Mtb Suspension Service + Mountain Bike Suspension Tuning Service + Mtb Shock Service

Fluid Focus is now a proud distributor of Super Alloy Racing springs — the most ground breaking, innovative and exciting springs yet :: Super Alloy Racing Springs + Super Alloy Racing Spring Enduro Lite

www.fluid-focus.com

There was an empty beer thread with every spring and true weights, but I can't find it.

 

[Jozz]

S4 told me that the SLS spring loses its "properties" faster than a Vault. Within a year it seems.

 

[Mo(n)arch]

Fwiw, a few data from H&R springs:
350-65- - 234g real
450-65 - real 449 lbs (99,7%) - 253g claimed
500-65 - - 287g real
525-65 - real 519 lbs (98,9%) - 311g real
600-76 - real 602 lbs (100,3%) - 436g claimed

The POM spacers weigh depending on the combination between 13g and 36g real.
Below a comparison between a Fox DHX and the Float X2.

All the data was shamelessly stolen from the German forum.
I'll go with this option as they are easily available and come with POM adapters for RockShox, FOX, CaneCreek and Öhlins.
Color is sh!te though.

 

[Gary]

The cheap Rockshox coil springs are surprisingly fairly light (for steel)

Not sure super accuracy to the springweights really matters all that much so long as you have correct sag with minimum preload etc. and at the price those are you could buy a few and run the one closest to your needs.

 

[sethimus]

why are there no stores that sell tested springs?

 

[englertracing]

why are there no stores that sell tested springs?

Brennan autosports used to....

Got hired by fox...
To help unfuck them...lol

 

[Happymtb.fr]

why are there no stores that sell tested springs?

Isn't SAR selling springs with a certificate nowadays? Anyhow SAR is much less relevant for me since brexit...

 

[Jm_]

I'm pretty sure the Ohlins stuff was claiming it was "tested"...

 

[jrewing]

Take springs to an MX or Road suspension specialist. They usually have spring testers.
My mates company os selling his old stock of K9 race steel branded eibach springs cheap 69 Kangaroo dollars. 25lb increments and quite accurate i believe.

 

[djjohnr]

Isn't SAR selling springs with a certificate nowadays? Anyhow SAR is much less relevant for me since brexit...

Yeah, Fluid Focus tests them and sends you the actual measured spring rate.

 

[ChrisRobin]

I just picked up a 400x65 EXT spring and man, it's light. The Ohlins springs are light too (the 450 Ohlins is just a tad heavier than the EXT I just picked up which was expected). The EXT spring is also super short. I'm at the bottom of the threads on the TTX22 but to make things play perfectly together, I'll probably get those MRP spring reducers.

 

[Jm_]

There's kind of a sweet spot in springs it seems. I've had those 400x65 that are super light and small...vs, a 350lb RS that is seemingly twice as heavy and 50% loner.

 

[ChrisRobin]

I have an original 'Obtanium' 500x3.0 Ti spring that's probably the lightest spring I've ever had. I seem to remember Obtanium was bought by someone else and their Ti springs got a little heavier. This one I have is unreal.

 

[djjohnr]

Sucks that Fluid Focus SAR only goes to 65mm....they even have a 700lb-er.

They sell both the Enduro (that only goes to 65mm) and the DH (65+) - https://www.fluid-focus.com/super-alloy-racing-springs

 

[Jm_]

They sell both the Enduro (that only goes to 65mm) and the DH (65+) - https://www.fluid-focus.com/super-alloy-racing-springs

Only up to 550lb tho

 

[djjohnr]

Only up to 550lb tho

They have them all - https://shop.fluid-focus.com/products/super-alloy-racing-dh-light-spring

 

[konifere]

@bullcrew and other spring specialists. I have an Ohlins TTX22m.2 in 260x65 that I've set to 60mm stroke with the included stroke limiters. I was running an Ohlins 67mm stroke spring (what was recommended by Ohlins). I just received some clearance Ohlins spring from Specialized that they spec on the Kenevos (with a 230x62.5mm TTX22m.2 shock), thinking they'd be the same 67mm stroke length, but they are 63mm.

I assume I'd be alright for my 60mm stroke shock, but I just want to ask if there would be an issue? I guess they're springs for an imperial 8.5x2.5 shock, it's a bit shorter than the one I currently have. Just wondering why Ohlins don't suggest those spring instead for 60mm stroke shocks. Thanks!

 

[bullcrew]

@bullcrew and other spring specialists. I have an Ohlins TTX22m.2 in 260x65 that I've set to 60mm stroke with the included stroke limiters. I was running an Ohlins 67mm stroke spring (what was recommended by Ohlins). I just received some clearance Ohlins spring from Specialized that they spec on the Kenevos (with a 230x62.5mm TTX22m.2 shock), thinking they'd be the same 67mm stroke length, but they are 63mm.

I assume I'd be alright for my 60mm stroke shock, but I just want to ask if there would be an issue? I guess they're springs for an imperial 8.5x2.5 shock, it's a bit shorter than the one I currently have. Just wondering why Ohlins don't suggest those spring instead for 60mm stroke shocks. Thanks!

You'll be fine it's the collapsed length..when travel is reduced on shock it's the ability to collapse is then limited too setting.
Your 60mm stroke length is under your 63mm spring, so you will be fine...

I run 230x65 shocks my springs are 67mm so it's 2mm over...your 3mm over..all good

When they get that close say 62.5 stroke 63mm spring collapse you just can't preload them as much...but if your 60mm stroke your more than fine

 

[konifere]

Thanks! I knew I'd learn something... I had not thought about the amount of preload added on the spring. I usually just run it so it doesn't move and add like 1 turn max, but I try to be on the right spring rate to not preload it too much.

Unless they're old stock and they now run 67mm springs, Specialized run those 63mm springs on 62.5mm stroke shocks (Kenevo), so it's still withing range but much closer to too short. On their website pictures, they have 67mm springs, but they did not specify which model years they were supposed to fit on.

Thanks again @bullcrew !

 

[bullcrew]

@konifere yeah you should not ever use more than 2-3 turns...usually just snug on proper rate and that's good..rule of thumb is every full turn is 1mm of compression so 3 turns 3mm of compression equates to close to 50/be of spring increase.
1 inch doubles rate or 25.4mm.. so a 400lbs spring compressed 25.4mm would be 800lbs and so on...

 

[Electric_City]

On FF website it says "Super Alloy Racing Enduro Light Spring (65mm Stroke or Less)"

Does that mean it's compatable with a 55mm shock also? I wonder what the limits are.

 

[ChrisRobin]

On FF website it says "Super Alloy Racing Enduro Light Spring (65mm Stroke or Less)"

Does that mean it's compatable with a 55mm shock also? I wonder what the limits are.

Yes. If you can physically fit the spring onto your shock, it'll work fine for 55mm stroke.