Fox "custom tune" codes

Muddy-Runs · May 24, 2019

I was curious about the tune i got on my DPX2, since i new its 'of the shelf' version my LBS got for my Bronson from Fox, so i checked the Custom Tune ID label on Fox site and this is what i got -
2018, SAMPLE, FLOAT DPX2, P-Se, A, 3pos-Adj Evol LV, FOX, ENG, 210, 55, CM, RM, Rezi A F F, No Logo, N/M

2018 - year
Sample - ?
Float DPX2 - model
P-Se - Performance Series Elite
A - 'black' coating
3pos-Adj Evol LV - 3 position adjustment, Extra Vol, Large Volume
FOX - ?
ENG - ?
210, 55 - size
CM - compression medium
RM - reverb medium
Rezi A F F - ?
N\M - ?

Most of it i understand, and for the rest i hope someone here can help with...

just6979 · Nov 18, 2019

Calhoun said:
3pos-Adj = Compression Adjust (high speed)
Evol LCR = This is the air can size?
Specialized, Stumpjumper 29 = bike make and model
210, 50, 1.0 Spacer = shock size & volume reducer size
CM = Compression medium
DRL = Digressive Rebound Low
Rezi A F M+ = ?

3pos-adj is NOT high speed. It indicates the shock has the 3 position Open/Medium/Firm low-speed lever and the open-mode has an adjustment.
Evol LCR is a Low Compression Ratio air can only for metric 210x50/52.5/55 shocks. I've only seen it on shocks tuned for 2019/2020 Specialized Stumpjumpers
CM & DRL (Light, not Low, on Fox's parts lists) are the high-speed stacks on the main-piston/mid-valve.
Rezi AFM+ is the base-valve at the top of the reservoir (rezi) and is connected to the 3pos-adj option: A = open mode is adjustable, F = firm low-speed compression in medium mode, M+= Firm/lockout mode blow-off threshold. On a shock without open-mode adjust, it would be "Rezi MFM+" or similar, and with a 2pos lever it would read "Rezi FM+" or similar.

just6979 · Nov 18, 2019

Corvette said:
Could anyone please explain the difference between Rezi A F F and Rezi F F M+ tunes/settings? @Dougal?

Rezi AFF is a 3pos-adj shock: A = adjustable low-speed compression (LSC) in Open mode, F = firm LSC in Medium mode, and F = firm threshold in Firm mode.

Rezi FFM+ is a 3pos shock: F = firm LSC in Open Mode, F = firm (firmer than open?) LSC in Medium mode, M+ is Medium Plus threshold in Firm Mode

just6979 · Nov 18, 2019

Muddy-Runs said:
I was curious about the tune i got on my DPX2, since i new its 'of the shelf' version my LBS got for my Bronson from Fox, so i checked the Custom Tune ID label on Fox site and this is what i got -
2018, SAMPLE, FLOAT DPX2, P-Se, A, 3pos-Adj Evol LV, FOX, ENG, 210, 55, CM, RM, Rezi A F F, No Logo, N/M

2018 - year
Sample - ?
Float DPX2 - model
P-Se - Performance Series Elite
A - 'black' coating
3pos-Adj Evol LV - 3 position adjustment, Extra Vol, Large Volume
FOX - ?
ENG - ?
210, 55 - size
CM - compression medium
RM - reverb medium
Rezi A F F - ?
N\M - ?

Most of it i understand, and for the rest i hope someone here can help with...

FOX means it's made/assembled by Fox. Perhaps some are assembled by the OEMs?
Sample and ENG (Engineering?) I think are related. The ENG spot is where you would usually find OEM or AM (aftermarket) code.
Rezi AFF means Open mode has adjustable LSC, Medium mode has firm LSC, and Firm mode has a firm threshold

Luke Bikewalker · Nov 18, 2019

This is very helpful @just6979, thanks a lot.

Muddy-Runs · Nov 19, 2019

just6979 said:
FOX means it's made/assembled by Fox. Perhaps some are assembled by the OEMs?

Sample and ENG (Engineering?) I think are related. The ENG spot is where you would usually find OEM or AM (aftermarket) code.

Rezi AFF means Open mode has adjustable LSC, Medium mode has firm LSC, and Firm mode has a firm threshold

Tnx for the info.

I was assuming its 'one of a kind' sample that made by Fox engineers. Not sure if its true or not, but either way it works good on my bike.

Luke Bikewalker · Nov 20, 2019

Does anyone know if the DPX2 base valve assembly can be tuned, eg. to increase the firm/"lockout" mode from "medium" to "firm" threshold compression setting for example?

Would a valve where climbing mode is configured to firmest setting have a smaller "firm mode port" hole than a valve with let's say medium setting? Or is this done simply by changing the reed valve configuration?

ZSW · Nov 21, 2019

Corvette said:
Does anyone know if the DPX2 base valve assembly can be tuned, eg. to increase the firm/"lockout" mode from "medium" to "firm" threshold compression setting for example?

Would a valve where climbing mode is configured to firmest setting have a smaller "firm mode port" hole than a valve with let's say medium setting? Or is this done simply by changing the reed valve configuration?

View attachment 1293905

Fox does sell different base valves for different compression configurations. You can find them here https://www.ridefox.com/fox17/help.php?m=bike&id=854

As far as modifying the one you already have, you could change the port selector, port size, valve or a combination of those. I haven't seen any base valves taken apart to be able to tell you how fox does it but someone else might chime in

Kevin Van Deventer · Nov 21, 2019

Edit: I've already purchased the fox factory and insite would still be appreciated though.

Hello I have this frame https://www.lightcarbon.com/all-new-lightcarbon-trail-mtb-frame-lcfs958_p118.html

Currently I have a fox performance 165x45 off a Kona hei hei trail.

It does ok but I am looking at this https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.com/ulk/itm/401768985488

It has this tune

2019, FLOAT DPS, F-S, K, 3pos-Adj, Trunnion, Evol SV, Evil, The Following, 165, 45, DCL, DRM, CML, Neutral Logo

I was going to see how it works and if it doesn't do well I would send it to Avalanche for tuning.

Part of my reasoning is I need a second shock so can have the other sent for service when needed

Second from the info I've gathered here this shock would have good pedal platform which a low single pivot flexstay bike would need I think.

But I am 145lbs and don't need as much compression so that's why I think it would work.

Here is the tune for my current shock

2017, FLOAT DPS, P-S, A, 3pos, Trunnion SV, Kona, Hei Hei Trail, 165, 45, 0.6 Spacer, CM, RF, Climb F, Standard Logo

marcoton21 · Dec 3, 2019

just6979 said:
Evol LCR is a Low Compression Ratio air can only for metric 210x50/52.5/55 shocks. I've only seen it on shocks tuned for 2019/2020 Specialized Stumpjumpers

Does anybody know more about what the Evol LCR does different from the the Evol LV? I honestly have no clue, but I have this LCR can in the shock now mounted to my Transition Smuggler.

marcoton21 · Dec 3, 2019

Lcr

just6979 said:
Evol LCR is a Low Compression Ratio air can only for metric 210x50/52.5/55 shocks. I've only seen it on shocks tuned for 2019/2020 Specialized Stumpjumpers

Does anybody know more about what the Evol LCR does different from the the Evol LV? I honestly have no clue, but I have this LCR can in the shock now mounted to my Transition Smuggler.

just6979 · Dec 3, 2019

marcoton21 said:
Does anybody know more about what the Evol LCR does different from the the Evol LV? I honestly have no clue, but I have this LCR can in the shock now mounted to my Transition Smuggler.

I've been trying to find out, especially since the LCR aircan is in the parts list (https://www.ridefox.com/fox17/help.php?m=bike&id=1031, 806-29-723-KIT), but not on the volume reduction charts (https://www.ridefox.com/fox17/help.php?m=bike&id=568).

I emailed info@ridefox.com pointing out the missing section on the volume reduction charts to see if we can get some info on compression ratios for the LCR can. Nothing yet though.

marcoton21 · Dec 4, 2019

marcoton21 said:
Does anybody know more about what the Evol LCR does different from the the Evol LV? I honestly have no clue, but I have this LCR can in the shock now mounted to my Transition Smuggler.

Mystery is solved: the positive air chamber on the LCR is bigger so that the end progression is lower compared to the normal LV. Source is the technician of Fox Germany.

ninjamoose161 · Jan 13, 2020

Great info in here, thanks everyone! How about these 2 shocks

Shock 1: 2019, FLOAT DPX2, P-Se, A, 3pos-Adj, Evol LV, Forbidden, Druid, 210, 55, 0.2 Spacer, CEC001, RLA014, Rezi A F M+, Standard Logo

Shock 2: 2019, FLOAT DPX2, P-S, A, 3pos, Evol LV, Ibis, Ripmo, 210, 55, 0.4 Spacer, CEC001, RLA014, Rezi L F M, Standard Logo

I'm looking to place shock 1 on an Ibis Ripmo, which comes with shock 2's specs. Everything looks the same except for:
- Spacer 0.2 vs 0.4 - that's a variable anyway depending on rider weight and style?
- Rezi AFM+ vs LFM - I can't figure out what this means and how much it matters?

I'm in no rush so I'll probably skip shock1 but I'd be curious to know what others think.

Edit: Also what do CEC and RLA mean?

edit2: I'll throw shock 3 into the mix: 2019, FLOAT DPX2, F-S, K, 3pos-Adj, Evol LV, FOX, AM, 210, 55, 0.2 Spacer, CM, DRM, Rezi A F M+, Orange Logo - sounds like this is an aftermarket version - would it be a good generic choice as a replacement for Shock 2?

just6979 · Jan 13, 2020

ninjamoose161 said:
Great info in here, thanks everyone! How about these 2 shocks

Shock 1: 2019, FLOAT DPX2, P-Se, A, 3pos-Adj, Evol LV, Forbidden, Druid, 210, 55, 0.2 Spacer, CEC001, RLA014, Rezi A F M+, Standard Logo

Shock 2: 2019, FLOAT DPX2, P-S, A, 3pos, Evol LV, Ibis, Ripmo, 210, 55, 0.4 Spacer, CEC001, RLA014, Rezi L F M, Standard Logo

I'm looking to place shock 1 on an Ibis Ripmo, which comes with shock 2's specs. Everything looks the same except for:
- Spacer 0.2 vs 0.4 - that's a variable anyway depending on rider weight and style?
- Rezi AFM+ vs LFM - I can't figure out what this means and how much it matters?

I'm in no rush so I'll probably skip shock1 but I'd be curious to know what others think.

Edit: Also what do CEC and RLA mean?

edit2: I'll throw shock 3 into the mix: 2019, FLOAT DPX2, F-S, K, 3pos-Adj, Evol LV, FOX, AM, 210, 55, 0.2 Spacer, CM, DRM, Rezi A F M+, Orange Logo - sounds like this is an aftermarket version - would it be a good generic choice as a replacement for Shock 2?

- Yes the spacers are a preference, but they also may be preinstalled by the bike manufacturer to suit the frame's suspension

- Rezi *** I believe refers to the low-speed compression tune at each position of the "climb switch". For AFM+, that's a 3-pos-adj model with the following tunes: Open position is Adjustable damping, Medium position is Firm damping, Firm position is Medium "lockout". LFM would be the 3-pos non-adjustable model, with a Low damping tune on the Open position. LFM is likely the same as the AFM+ with 0-2 clicks (from open, 9-11 from closed) of low-speed compression with the 3mm adjuster.

- CEC and RLA are [semi-custom] shim stacks, that I think come from common requests from suspension designers. You can actually see the exact shim stacks at https://www.ridefox.com/fox17/help.php?m=bike&id=1031. The RLAs seem to be linear, though RLA019 looks similar to the digressive ones. CEC001 seems to be a Linear Medium-ish, while CLA001 looks like it might be kind of a Digressive Medium-Plus.

- The third shock, with the DRM (Digressive Rebound Medium) tune, might not have the correct amount of rebound damping at certain parts of the stroke when used on a frame designed around an RLA or other tune. "Might" being the key word. You may not notice anything, or you may absolutely hate it.

ninjamoose161 · Jan 14, 2020

just6979 said:
- Yes the spacers are a preference, but they also may be preinstalled by the bike manufacturer to suit the frame's suspension

- Rezi *** I believe refers to the low-speed compression tune at each position of the "climb switch". For AFM+, that's a 3-pos-adj model with the following tunes: Open position is Adjustable damping, Medium position is Firm damping, Firm position is Medium "lockout". LFM would be the 3-pos non-adjustable model, with a Low damping tune on the Open position. LFM is likely the same as the AFM+ with 0-2 clicks (from open, 9-11 from closed) of low-speed compression with the 3mm adjuster.

- CEC and RLA are [semi-custom] shim stacks, that I think come from common requests from suspension designers. You can actually see the exact shim stacks at https://www.ridefox.com/fox17/help.php?m=bike&id=1031. The RLAs seem to be linear, though RLA019 looks similar to the digressive ones. CEC001 seems to be a Linear Medium-ish, while CLA001 looks like it might be kind of a Digressive Medium-Plus.

- The third shock, with the DRM (Digressive Rebound Medium) tune, might not have the correct amount of rebound damping at certain parts of the stroke when used on a frame designed around an RLA or other tune. "Might" being the key word. You may not notice anything, or you may absolutely hate it.

Thanks for the info. Probably best not worth risking it with shock 3. Shock 1 might be an option by the sounds of it. I'm in no rush so I'll keep my eyes peeled for shock 2.

not2shabby · Jan 20, 2020

deleted

jayrob · Jun 24, 2020

marcoton21 said:
Mystery is solved: the positive air chamber on the LCR is bigger so that the end progression is lower compared to the normal LV. Source is the technician of Fox Germany.

This is wild since the stumpjumper is supposedly very linear. Any guesses as to why Specialized would want less progression than the normal tune?

sethde · Jun 30, 2020

Mine says

2020, FLOAT DPX2, F-S, K, 3pos-Adj, Evol LV, Yeti, SB130, 210, 52.5, CDZ002, RDZ002, Rezi A F M, Neutral Logo

I think I understand all of that except for "CDZ002" and "RDZ002". Any ideas on those?

InVeloVeritas · Jun 30, 2020

sethde said:
Mine says

2020, FLOAT DPX2, F-S, K, 3pos-Adj, Evol LV, Yeti, SB130, 210, 52.5, CDZ002, RDZ002, Rezi A F M, Neutral Logo

I think I understand all of that except for "CDZ002" and "RDZ002". Any ideas on those?

My guess would be custom valve stacks (digressive) based on the usage of DR in the generic stack assembly part numbers.

Fox "custom tune" codes

Muddy-Runs

just6979

just6979

just6979

Luke Bikewalker

Muddy-Runs

Luke Bikewalker

ZSW

Kevin Van Deventer

marcoton21

marcoton21

just6979

marcoton21

ninjamoose161

just6979

ninjamoose161

not2shabby

jayrob

sethde

InVeloVeritas

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