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The 100% Trek Slash forum: Posts, Comments, Questions and More.

PB Forum :: All Mountain, Enduro & Cross-Country
The 100% Trek Slash forum: Posts, Comments, Questions and More.
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flag stubestrong
Posted: Mar 15, 2016 at 4:16 Quote
300psi then set sag.

I'm 92kg and run 4bands 270/275psi 30%
flag griz23
Posted: Mar 15, 2016 at 5:05 Quote
enduroFactory wrote:
300psi then set sag.

I'm 92kg and run 4bands 270/275psi 30%

I've actually tried 280psi with 6 bands but I'll try 300 cheers
flag griz23
Posted: Mar 15, 2016 at 5:59 Quote
griz23 wrote:
enduroFactory wrote:
300psi then set sag.

I'm 92kg and run 4bands 270/275psi 30%

I've actually tried 280psi with 6 bands but I'll try 300 cheers

Just tried 300psi with 6 bands and still getting around 33-35% sag
flag Giladgu
Posted: Mar 15, 2016 at 9:01 Quote
griz23 wrote:
griz23 wrote:
enduroFactory wrote:
300psi then set sag.

I'm 92kg and run 4bands 270/275psi 30%

I've actually tried 280psi with 6 bands but I'll try 300 cheers

Just tried 300psi with 6 bands and still getting around 33-35% sag
iv found that th slash feels the best with around that much sag in the rear.
flag rickaybobbay
Posted: Mar 15, 2016 at 10:29 Quote
griz23 wrote:
Just after some advice on the setup of my shock I've got debonair plus rc3 on my 2015 slash and I'm struggling setting it up right.
I weigh 220 lbs and even with 250psi in and 6 bottomless rings I'm still only getting 40% sag.
Is it just that the shock needs a service
Any advice appreciated

Needs more air. I'm 190, 200 kitted, and I throw in about 230. It's a high volume shock. So it needs more of DAH air
flag rickaybobbay
Posted: Mar 15, 2016 at 10:30 Quote
Giladgu wrote:
griz23 wrote:
griz23 wrote:


I've actually tried 280psi with 6 bands but I'll try 300 cheers

Just tried 300psi with 6 bands and still getting around 33-35% sag
iv found that th slash feels the best with around that much sag in the rear.

Yeah 35-38% sag is solid for an aggressive bike like the slash
flag griz23
Posted: Mar 15, 2016 at 10:37 Quote
TFreeman wrote:
Giladgu wrote:
griz23 wrote:


Just tried 300psi with 6 bands and still getting around 33-35% sag
iv found that th slash feels the best with around that much sag in the rear.

Yeah 35-38% sag is solid for an aggressive bike like the slash
So running it at 33%sag should be fine then thanks for the help
flag j-t-g
O+
Posted: Mar 15, 2016 at 12:34 Quote
I run mine at 25% sag at 220 lbs, but I had to get it tuned
flag stubestrong
Posted: Mar 15, 2016 at 12:56 Quote
j-t-g wrote:
I run mine at 25% sag at 220 lbs, but I had to get it tuned

Was that tune reducing the negative chamber?
flag griz23
Posted: Mar 15, 2016 at 13:07 Quote
enduroFactory wrote:
j-t-g wrote:
I run mine at 25% sag at 220 lbs, but I had to get it tuned

Was that tune reducing the negative chamber?

I spoke to tf tuned today about this and whilst they said you could put some bottomless rings in the negative chamber it wouldn't help with setting the sag but would help it as it goes through the travel ramping up
flag andrextr
Posted: Mar 15, 2016 at 16:17 Quote
Are you really sure that you meant negative chamber? Or do you mean the secundary positive chamber?

Because IMHO decreasing the volume of negative chamber is not very good. I'm building an air shock simulator to share for free with everyone (at youtube.com/andrextr), and, as you can see, decreasing the negative chamber volume increases the initial stiffness of the shock and provides less mid travel support. Since the shock became more stiffer with lower negative volume, you don't need to run so much pressure to achieve the same SAG, and as a consequence you end up with lower bottom-out force.

Effect of negative chamber volume length in the air spring curve. Bigger negative chambers EVOL Debonair Vivid are more sensitive in the first 1 3 of the travel and have more mid stroke support. Thus they need more force to fully to bottom-out.

Bye Smile
flag stubestrong
Posted: Mar 16, 2016 at 2:38 Quote
griz23 wrote:
enduroFactory wrote:
j-t-g wrote:
I run mine at 25% sag at 220 lbs, but I had to get it tuned

Was that tune reducing the negative chamber?

I spoke to tf tuned today about this and whilst they said you could put some bottomless rings in the negative chamber it wouldn't help with setting the sag but would help it as it goes through the travel ramping up

im hit and miss with negative chambers, to me it feels like a plaster over a cut engineering.
Theres plus points but if your looking to run under 30% sag the system dosnt want to know.
flag tomertrx
Posted: Mar 22, 2016 at 16:50 Quote
I have 7 or 8 band in my shock and it has 280psi in it. It's sag is 33 to 35 %. It's good with small bumps but it feels like there should not support in the middle of the travel. I am around 255 with out gear and with gear 265-270. That is why I have coilover waiting to get put on. The stock shock needs more compression damping for bigger riders.
flag stubestrong
Posted: Mar 23, 2016 at 10:09 Quote
tomertrx wrote:
I have 7 or 8 band in my shock and it has 280psi in it. It's sag is 33 to 35 %. It's good with small bumps but it feels like there should not support in the middle of the travel. I am around 255 with out gear and with gear 265-270. That is why I have coilover waiting to get put on. The stock shock needs more compression damping for bigger riders.

One suspension tuning guy said use 1band in negative chamber can reduce sag near 3% without no tech issue then load main chamber with bands depending on ramp up you want in that last 1/4 of travel.

Sounds like you need past 300psi.
flag tomertrx
Posted: Mar 23, 2016 at 12:21 Quote
I have had it to 310 and rear suspension was really harsh and could still bottom out in the bigger hits.

 


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