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2021 Fox 36 Grip2, Question about relationship between LSR and HSR and the effects on perceived suppleness.

2743 Views 9 Replies 4 Participants Last post by  thatalexguy, 
thatalexguy
I have a 21 Fox 36 Grip 2, 160mm on a 21 Stumpjumper Evo. I was recently watching a video by Vorsprung regarding setting rebound and simplifying setup by closing off HSR and using LSR primarily to set rebound. Use HSR to adjust rebound for further adjustment if LSR is not enough. I closed off HSR completely and used LSR to adjust the rebound to a rate that was just fast enough for the air pressure. I am 160lbs/73kg and 80 PSI is about what I need. I found that when I completely closed off HSR, the fork immediately felt much more supple. I made no adjustments to LSC or HSC which I keep mostly wide open. As I added HSR back, the fork became noticeably less supple firming up throughout its travel. I set HSR back to 0 and took a ride. The fork felt fine in most conditions except in one deep travel situation where the fork briefly felt very unsettled. I added 3 clicks HSR and it felt better but the fork firmed up throughout its travel. It is still comfortable.

The question... what exactly is happening here?
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Dougal
Too much LSR with too little HSR will feel dead and unstable from deep compression.
Too little LSR with too much HSR will feel uncontrolled on small movements but pack at speed.

These forks suffer from a big mid-valve effect. Basically the rebound ports can't bypass enough oil on compression which makes them harsh.
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thatalexguy
The fork is due for its 125 hr full service. Is the strong mid valve affect something that can be tuned to better separate the HSR and LSR?

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Dougal
thatalexguy said:
The fork is due for its 125 hr full service. Is the strong mid valve affect something that can be tuned to better separate the HSR and LSR?

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Midvalve requires modifications to fix. The damper also needs modified so you can get a decent amount of compression damping into it.
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W
FWIW this approach was recommended for the pre-~2020 X2s, DHX2 and CCDB. Vorsprung fella cleared up in some comments that this approach wasn't recommended for grip 2 nor for newer versions of x2/dhx2.

As far as what is happening I think the visuals he shared in that video would still be applicable in concept i.e. where it is impacting the return speed and how the curve can shift.
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Macharza
WildGeese said:
FWIW this approach was recommended for the pre-~2020 X2s, DHX2 and CCDB. Vorsprung fella cleared up in some comments that this approach wasn't recommended for grip 2 nor for newer versions of x2/dhx2.

As far as what is happening I think the visuals he shared in that video would still be applicable in concept i.e. where it is impacting the return speed and how the curve can shift.
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Did you mean this video?
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thatalexguy
Macharza said:
Did you mean this video?
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That's the video I watched that inspired me to radically adjust my rebound.

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W
Macharza said:
Did you mean this video?
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Yes. See his comments here:

www.mtbr.com

Vorsprung Smashpot Coil Conversion

So, Vorsprung have an upcoming coil conversion for forks and I thought it would be good to get a thread going. One thing I noticed they are doing that Push are not is supporting travel up to 180mm. I have a brand new 36 on the way and will be getting a smashpot when they come out, I've heard...
www.mtbr.com www.mtbr.com
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thatalexguy
WildGeese said:
Yes. See his comments here:

www.mtbr.com

Vorsprung Smashpot Coil Conversion

So, Vorsprung have an upcoming coil conversion for forks and I thought it would be good to get a thread going. One thing I noticed they are doing that Push are not is supporting travel up to 180mm. I have a brand new 36 on the way and will be getting a smashpot when they come out, I've heard...
www.mtbr.com www.mtbr.com
Click to expand...
Is there a post # in particular?

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thatalexguy
Nevermind, I found the post from Steve VS

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