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DPX2 for 17/18 Fuel EX?

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#301 ·
After a few more rides, I think a .2 spacer is needed. I know I don't need the .6 and bigger spacers that come in the kit and found Fanatic bike sells the .4 spacer individually for $5, so I ordered one and will trim it down a bit and keep the original .4 just in case.
 
#302 ·
I took a pair of snips and trimmed down a .4 spacer to ~ .25-.3 and got a ride in today. Psi set at 210. I figured I'd try open mode first and ended up leaving it there. Super plush on the small stuff and still supportive pedaling and on the bigger hits/drops. Still had 4-5mm of travel left. Think I'm done tinkering...for now.
 
#304 ·
Subbed.
New 17 9.9 frame on the stand and wondering if I should give the stock ReAktiv a go or not. The DPX2 seems like the way to go for more aggressive DH type riding, but I am mostly an XC rider with terrain we have here. A new 2020 rear shock does sound rad!
 
#305 ·
NH Mtbiker said:
Subbed.
New 17 9.9 frame on the stand and wondering if I should give the stock ReAktiv a go or not. The DPX2 seems like the way to go for more aggressive DH type riding, but I am mostly an XC rider with terrain we have here. A new 2020 rear shock does sound rad!
Click to expand...
I bought new dpx2 2020, bike feels great, so much better than the reaktiv. I rode trails in Finale Ligure and I wasn't happy with the bike. I wanted to sell it but I decided to upgrade the fork cartridge to fit4 2020 and changed damper to dpx2 2020. Love the bike and I'm gonna keep it.
 
#306 ·
NH Mtbiker said:
Subbed.
New 17 9.9 frame on the stand and wondering if I should give the stock ReAktiv a go or not. The DPX2 seems like the way to go for more aggressive DH type riding, but I am mostly an XC rider with terrain we have here. A new 2020 rear shock does sound rad!
Click to expand...
Was not satisfied with ReAktiv on my 17 could never find the sweet spot. Went with a 19 dpx2 and never looked back. IMO set up properly really livens this frame no matter how you ride it.

That being said, I now have 2020 Fuel Ex and wow what a difference in performance on new ReAktiv! Finally I believe they nailed it. I kept my dpx2 in case ReAktiv didn't live up to my expectations. Will install dpx2 at some point for a comparison on ride vs ReAktiv.
 
Discussion starter · #307 ·
techfersure said:
That being said, I now have 2020 Fuel Ex and wow what a difference in performance on new ReAktiv! Finally I believe they nailed it. I kept my dpx2 in case ReAktiv didn't live up to my expectations. Will install dpx2 at some point for a comparison on ride vs ReAktiv.
Click to expand...
Agree 100%. Pleasantly surprised. Now it just has to pass the test of time.
 
#308 ·
not2shabby said:
I took a pair of snips and trimmed down a .4 spacer to ~ .25-.3 and got a ride in today. Psi set at 210. I figured I'd try open mode first and ended up leaving it there. Super plush on the small stuff and still supportive pedaling and on the bigger hits/drops. Still had 4-5mm of travel left. Think I'm done tinkering...for now.
Click to expand...
@Not2Shabby Sorry for my delay, I've meant to reply for months...
To answer your initial question as to why I'm on a FuelEX and not a Slash? I race XC occasionally so the FuelEX can work as double duty with some mods to the bike. I swap out my wheelset, often go back to the Reactiv shock for racing and sometimes swap out a few other parts. That said, I wish it had the head angle of the Slash.

Regarding your setup... I still think you're riding that shock over damped. If you are at 210psi and 6 clicks from closed? You should be more like 8 clicks from closed (which is what the Fox chart says for that shock). 6 clicks from closed is for when you have closer to 240psi in the air can. Also, the spacer has no affect on the rebound. Only the air can pressure. ... I know you said you've ridden a lot of motorbikes... they tend to be much more over damped than a MTB would be. They have more travel to work from and generally run heavier damping anyhow. So if you're running your 130mm FuelEX to rebound like a motorbike, it's too slow for MTB performance. I can run my shock at 220 psi with zero rebound (full open) and it will kick off jumps and will feel a bit 'out of control' in fast stuff, but it doesn't prevent me from climbing up anything.
 
#309 ·
btjenki said:
@Not2Shabby Sorry for my delay, I've meant to reply for months...
To answer your initial question as to why I'm on a FuelEX and not a Slash? I race XC occasionally so the FuelEX can work as double duty with some mods to the bike. I swap out my wheelset, often go back to the Reactiv shock for racing and sometimes swap out a few other parts. That said, I wish it had the head angle of the Slash.

Regarding your setup... I still think you're riding that shock over damped. If you are at 210psi and 6 clicks from closed? You should be more like 8 clicks from closed (which is what the Fox chart says for that shock). 6 clicks from closed is for when you have closer to 240psi in the air can. Also, the spacer has no affect on the rebound. Only the air can pressure. ... I know you said you've ridden a lot of motorbikes... they tend to be much more over damped than a MTB would be. They have more travel to work from and generally run heavier damping anyhow. So if you're running your 130mm FuelEX to rebound like a motorbike, it's too slow for MTB performance. I can run my shock at 220 psi with zero rebound (full open) and it will kick off jumps and will feel a bit 'out of control' in fast stuff, but it doesn't prevent me from climbing up anything.
Click to expand...
personal preference is a big part of setup. the fox chart is nothing but a starting point. you can even see this with pros who have various setups. typically fast riders will be much stiffer than average riders. for example if i jump on richie rude's enduro bike i will think it's too stiff even though we are the same height and weight.
 
#314 ·
btjenki said:
@Not2Shabby Sorry for my delay, I've meant to reply for months...
To answer your initial question as to why I'm on a FuelEX and not a Slash? I race XC occasionally so the FuelEX can work as double duty with some mods to the bike. I swap out my wheelset, often go back to the Reactiv shock for racing and sometimes swap out a few other parts. That said, I wish it had the head angle of the Slash.

Regarding your setup... I still think you're riding that shock over damped. If you are at 210psi and 6 clicks from closed? You should be more like 8 clicks from closed (which is what the Fox chart says for that shock). 6 clicks from closed is for when you have closer to 240psi in the air can. Also, the spacer has no affect on the rebound. Only the air can pressure. ... I know you said you've ridden a lot of motorbikes... they tend to be much more over damped than a MTB would be. They have more travel to work from and generally run heavier damping anyhow. So if you're running your 130mm FuelEX to rebound like a motorbike, it's too slow for MTB performance. I can run my shock at 220 psi with zero rebound (full open) and it will kick off jumps and will feel a bit 'out of control' in fast stuff, but it doesn't prevent me from climbing up anything.
Click to expand...
A couple clicks off the Fox setup chart isn't a huge difference IMHO. Obviously we ride very different terrain and most likely have different rebound tunes also. I personally don't like having the seat smack my ass after hitting a big root or rock, so have the rebound set to prevent that. YMMV as they say.
P.S. I've already admitted to being old and slow....
 
#315 ·
So this is the tune I found for the shock. I can't figure out what CDZ002 and RDZ002 mean. Any one? How about the Rzi AFM thing?

2020, FLOAT DPX2, F-S, K, 3pos-Adj, Evol LV, Yeti, SB130, 210, 52.5, CDZ002, RDZ002, Rezi A F M, Neutral Logo
 
#316 ·
Here's a link to Fox's list of parts for the DPX2.
https://www.ridefox.com/fox17/help.php?m=bike&id=970
I don't see CDZ002 or RDZ002, but I'd guess they mean Compression Regressive and Rebound Regressive. I have no idea what the Z002 part means; but probably specifies the shim stack. I'm not sure how a regressive tune would work on a Fuel either. Both of mine are linear, I assume. You could swap out the shim stacks or send it to Fox though if you don't like it. The Ripmo tune my shock has works pretty dang good, I just have to run a few more clicks of rebound than they suggest.
It looks like the Rezi code is for the base valve. They don't have much info on them.
 
#318 ·
I just found in another thread what the Rezi codes mean. Mine is LFM.
First letter is for the open mode, so L is light comp. A is adjustable on Factory series.
Second letter is middle position, F would be firm.
Third letter is lockout position, M for medium.
Looks like yours would be Adjustable, Firm, Medium.
You found a Factory or Performance series shock for $200?! That is a deal!
 
#319 ·
If you end up not liking the tune, you could send it to Avalanche or another reputable tuner and get it set up custom for your weight and riding style instead of guessing which stock Fox shim stacks would work for you.
Right now I'm quite happy with the Ripmo tune, but down the road might opt for something else. It's soooooo much better the stock shock!
 
#320 ·
Just reread your post with the full description...F-S is factory series. You got the full Kashima treatment, Nice! Should have a bit less friction/stiction than the black anodized performance series. The black goes better with my Yarilanche though!
There's even more info in this thread if you're interested.
https://forums.mtbr.com/shocks-suspension/fox-custom-tune-codes-1075842.html
 
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