[Arturo_S]

Hello

Shock: DPX2 Factory
Bike: Santa Cruz Bronson V1
Weight: 74 kg
Pressure: 150 psi
Rebound: 12
LSC: 0
no volume spacer

I find it hard to make the shock track the ground as well as the fork, thinking maybe open more the rebound?

video link

 

[Cary]

What is your sag? Pressure seems low. That bike has a nearly linear linkage ratio, I would expect you to need a volume spacer to control bottoming.

 

[Arturo_S]

currently at 30% approx. dont feel like bottoming out is an issue, currently at 0 spacers and i only bottom on drop to flats or really big compression, aside from that ravel use is balanced in front and back

 

[thatalexguy]

I had a similar issues with my DPX2 on my 21 Stumpjumper Evo where it felt too firm at 30%, comfortable at less than 30% but had issues with the ride height and pedal strikes. Someone recommend I remove a negative volume spacer and it made a significant difference. Shock feels more sensitive up top as that enlarged the negative spring. I did have to increase positive chamber pressure to achieve proper sag again and also add a little bit of compression. To access the rings you must completely remove the air can and you will find them on the stanchon side. Mine were 2 red rubber rings. Images came from the internet.

Sent from my Pixel 4a using Tapatalk

 

[Arturo_S]

Sounds like a good idea, thank you very much, did you need any special tools or something like that? also is it safe? they are there for a reason i suupose

 

[Arturo_S]

I had a similar issues with my DPX2 on my 21 Stumpjumper Evo where it felt too firm at 30%, comfortable at less than 30% but had issues with the ride height and pedal strikes. Someone recommend I remove a negative volume spacer and it made a significant difference. Shock feels more sensitive up top as that enlarged the negative spring. I did have to increase positive chamber pressure to achieve proper sag again and also add a little bit of compression. To access the rings you must completely remove the air can and you will find them on the stanchon side. Mine were 2 red rubber rings. Images came from the internet.

Sent from my Pixel 4a using Tapatalk

Sounds like a good idea, what is your Custom tune ID?, looking forward to it, thanks

 

[thatalexguy]

Sounds like a good idea, thank you very much, did you need any special tools or something like that? also is it safe? they are there for a reason i suupose

No special tools. Depressurize the shock and the air can threads off and then pull off completely. Rings slide off the end. I found it more challenging to put the air can back on as air trapped between the lower seals and the air can so I compressed the shock and got the can to thread on again. Rings are oily so use gloves or clean fingers to not contaminate the oil. I have found it safe as it is another tuning option just like adding or subtracting positive volume spacers. The rings are there to help tune the shock spring curve for the negative side. Whatever is there is what the bike mfg thinks is the preferred default setup but it's safe to add or remove volume spacers to make the shock respond more to our liking.

Sent from my Pixel 4a using Tapatalk

 

[Arturo_S]

No special tools. Depressurize the shock and the air can threads off and then pull off completely. Rings slide off the end. I found it more challenging to put the air can back on as air trapped between the lower seals and the air can so I compressed the shock and got the can to thread on again. Rings are oily so use gloves or clean fingers to not contaminate the oil. I have found it safe as it is another tuning option just like adding or subtracting positive volume spacers. The rings are there to help tune the shock spring curve for the negative side. Whatever is there is what the bike mfg thinks is the preferred default setup but it's safe to add or remove volume spacers to make the shock respond more to our liking.

Sent from my Pixel 4a using Tapatalk

Thank you very much Alex, I will check first if there are negative volume in the shock and report back after doing the canges

 

[thatalexguy]

Sounds like a good idea, what is your Custom tune ID?, looking forward to it, thanks

My shock code is D82Q

Part number: 973-63-111
Short ID: D82Q
Description: 2021, FLOAT DPX2, P-Se, A, 3pos-Adj, Evol LCR, Specialized, SJ EVO Expert S2-S3, 210, 55, 0.6 Spacer, CCF002, RLA014, Rezi A2 L- M+, Standard Logo, N/M

Sent from my Pixel 4a using Tapatalk

 

[Arturo_S]

My shock code is D82Q

Part number: 973-63-111
Short ID: D82Q
Description: 2021, FLOAT DPX2, P-Se, A, 3pos-Adj, Evol LCR, Specialized, SJ EVO Expert S2-S3, 210, 55, 0.6 Spacer, CCF002, RLA014, Rezi A2 L- M+, Standard Logo, N/M

Sent from my Pixel 4a using Tapatalk

interesting that the negative volume spacers are not included in the tune description

 

[thatalexguy]

interesting that the negative volume spacers are not included in the tune description

I didn't know it was a tunable option till recently. Parts are listed in the exploded diagram and also on the fox website.

FLOAT DPX2 Part Information | Bike Help Center | FOX

www.ridefox.com

Sent from my Pixel 4a using Tapatalk

 

[Arturo_S]

I didn't know it was a tunable option till recently. Parts are listed in the exploded diagram and also on the fox website.

FLOAT DPX2 Part Information | Bike Help Center | FOX

www.ridefox.com

Sent from my Pixel 4a using Tapatalk

thanks, I'm currently cheking it, I hope mine has them installed, because if not then its the shim stack setting

 

[aeiouandsometimesy]

Hello

Shock: DPX2 Factory
Bike: Santa Cruz Bronson V1
Weight: 74 kg
Pressure: 150 psi
Rebound: 12
LSC: 0
no volume spacer

I find it hard to make the shock track the ground as well as the fork, thinking maybe open more the rebound?

video link

Hi, before you go down this path of modifying your negative spring, can you confirm, is your rebound clicker count 12 from open or 12 from closed?
If it's 12 clicks out from closed, it's nearly open so you would perhaps pursue that negative spring change.
However, if your counting 12 clicks in from open you have a significant about of rebound damping so you would want to back that out. This would absolutely result in your shock "packing down"; it would not be rebounding in time with supporting shaft travel for your next compression.
So, if you are listing 12 clicks IN from OPEN, start backing off the rebound clicks to speed rebound up which will for sure help the rear suspension track the ground better.

 

[Arturo_S]

Hi, before you go down this path of modifying your negative spring, can you confirm, is your rebound clicker count 12 from open or 12 from closed?
If it's 12 clicks out from closed, it's nearly open so you would perhaps pursue that negative spring change.
However, if your counting 12 clicks in from open you have a significant about of rebound damping so you would want to back that out. This would absolutely result in your shock "packing down"; it would not be rebounding in time with supporting shaft travel for your next compression.
So, if you are listing 12 clicks IN from OPEN, start backing off the rebound clicks to speed rebound up which will for sure help the rear suspension track the ground better.

12 clicks from closed, yes its nearly open, I have traid goin faster but it feels harsh, and slowers feels very "muted".

 

[Arturo_S]

There are no negative volume reducers, so I will start playing with rebound, my guess is 2 clicks faster (from starting point) so it tracks the ground better, after that 2 clicks slower (from starting point) to see if it rebounds so fast that it skips over stuff, will report after changes

 

[thatalexguy]

There are no negative volume reducers, so I will start playing with rebound, my guess is 2 clicks faster (from starting point) so it tracks the ground better, after that 2 clicks slower (from starting point) to see if it rebounds so fast that it skips over stuff, will report after changes
View attachment 1952944

There is also an adjustment screw for compression that can be used to fine tune open mode. It's the 3mm screw in the center of the 3 mode lever. Set it full open/fast and see if that helps and then back off as necessary. I don't know if your shock is a performance or performance elite but the adjustment exists on the performance elite. The other thing is when pressuring the shock, slowly cycle the travel every 25psi to equalize the chambers. This is per Fox recommendation in the set up guide for the DPX2.

Sent from my Pixel 4a using Tapatalk

 

[Cary]

My shock code is D82Q

Part number: 973-63-111
Short ID: D82Q
Description: 2021, FLOAT DPX2, P-Se, A, 3pos-Adj, Evol LCR, Specialized, SJ EVO Expert S2-S3, 210, 55, 0.6 Spacer, CCF002, RLA014, Rezi A2 L- M+, Standard Logo, N/M

Sent from my Pixel 4a using Tapatalk

So you are running a 210x55 shock on a bike designed for a 200x57?! Perhaps start with the correct sized shock!

 

[thatalexguy]

So you are running a 210x55 shock on a bike designed for a 200x57?! Perhaps start with the correct sized shock!

I have a different bike than the OP. He asked for my shock code to compare the tune. Near the top of the thread I suggested a modification to his DPX2 that was suggested to me as I had a somewhat similar issue with my 21 Stumpjumper Evo where I couldn't get the shock to feel right. Removing a negative spacer helped in my case in improving rear suspension tracking and comfort.

Sent from my Pixel 4a using Tapatalk

 

[Cary]

I have a different bike than the OP. He asked for my shock code to compare the tune. Near the top of the thread I suggested a modification to his DPX2 that was suggested to me as I had a somewhat similar issue with my 21 Stumpjumper Evo where I couldn't get the shock to feel right. Removing a negative spacer helped in my case in improving rear suspension tracking and comfort.

Sent from my Pixel 4a using Tapatalk

Ahh, thanks. I scrolled up a bit and thought it was on his bike.

 

[Arturo_S]

There is also an adjustment screw for compression that can be used to fine tune open mode. It's the 3mm screw in the center of the 3 mode lever. Set it full open/fast and see if that helps and then back off as necessary. I don't know if your shock is a performance or performance elite but the adjustment exists on the performance elite. The other thing is when pressuring the shock, slowly cycle the travel every 25psi to equalize the chambers. This is per Fox recommendation in the set up guide for the DPX2.

Sent from my Pixel 4a using Tapatalk

LSC is OPEN (fully plush) and i have cycled the sock correctly, could be a maintanice issue, It has been a year since I bought it