[madpharma]

Hello !

I have a 2018 yt tues (new model that came out) and it comes with a performance float x2.
The issue is that with the correct sag: 28-30% and even the air can full of spacers (4 /4) its bottoming out in a harsh way in drops or jumps that dont have a nice perfect landing.

I been told and read that the tues has one of the most progressive suspension behaviour... so anyone knows if the shock its too linear? could be that the lack of high speed compression adjs. and the big air can (its a 267mm shock) ends up producing a shock that lacks bottom out resistance?

I other bikes wich in theory had less progression, running a coil shock and more sag.... I never had this harsh bottom outs...

Thanks everyone in advance!

 

[Sandro]

The Float X2 is definitely on the more linear side for an air shock, but i haven't had any trouble with the factory model (no spacers for trail duty) on my Nomad, which should be a bit less progressive than your Tues and uses a shorter shock. When I increase sag from 25% to 30% for park days I'll use full travel, but I've never experienced noticeable bottom outs (I will however pop in some spacers next time I ride larger jumps and drops as I'd like a bit more ramp up in those situations).

I have no idea if your experience is in any way related to the lack of HS compression adjustment, hopefully some members more knowledgeable in the ways of supsension will chime in.

 

[Tantrum Cycles]

Hello !

I have a 2018 yt tues (new model that came out) and it comes with a performance float x2.
The issue is that with the correct sag: 28-30% and even the air can full of spacers (4 /4) its bottoming out in a harsh way in drops or jumps that dont have a nice perfect landing.

I been told and read that the tues has one of the most progressive suspension behaviour... so anyone knows if the shock its too linear? could be that the lack of high speed compression adjs. and the big air can (its a 267mm shock) ends up producing a shock that lacks bottom out resistance?

I other bikes wich in theory had less progression, running a coil shock and more sag.... I never had this harsh bottom outs...

Thanks everyone in advance!

Have you put any internal vol spacers in?

 

[madpharma]

Have you put any internal vol spacers in?

If you mean the orange volume spacers, then yes, 4 of 4 that are allowed inside

 

[StiHacka]

Can you tell a difference between HSC full in/out on the X2?

 

[madpharma]

its the performance that only has ls adjuster.

 

[StiHacka]

MOAR SHIMZ!

 

[rockofullr]

How much do you weigh?

To me it sounds like there may be an issue with your shock. I know a few people running X2s on 2017 Tues and it works fine (I'm planning on upgrading my 2017 Capra to either a coil or an X2 for the linear spring rate). The 2018 is pretty close to the 2017 in terms of leverage ratio, they actually made it a bit less progressive at the end of the travel.

Shot in the dark diagnosis: I'm guessing there is an issue with the negative chamber pressure causing the shock to bottom out. Probably too much pressure trapped in the negative chamber.

Take all the air out of the shock and then use the Fox setup guide directions to make sure the sag and negative air chamber pressure are properly set.

https://www.ridefox.com/dl/bike/605-00-165-FLOAT X2 Tuning Guide-revA.pdf

 

[dan-o]

Shot in the dark diagnosis: I'm guessing there is an issue with the negative chamber pressure causing the shock to bottom out. Probably too much pressure trapped in the negative chamber.

Take all the air out of the shock and then use the Fox setup guide directions to make sure the sag and negative air chamber pressure are properly set.

https://www.ridefox.com/dl/bike/605-00-165-FLOAT X2 Tuning Guide-revA.pdf

^^^ start here

 

[dcamp29]

if the neg chamber was too high in pressure- you'd never be getting 30% sag on a bike that progressive.

Make sure you are measuring sag% correctly. Some fox shocks don't bottom out at the end of the damper body.

 

[madpharma]

Thanks everyone for the responses. I already had set the air pressure correctly so that wouldnt be the issue, and sag its correctly measured (I even took measures at the wheel).

I weight 72kg and im running 139psi and full of volume spacers.

Its not that I bottom out very often, the shock rides reasonably well (I would like a lot more hsc and less lsc which I run more closed to compensate).

Maybe I didn't explain correctly, The thing is that when it bottoms its in a really harsh way, like if it didnt have a bottom out bumper at the end. A loud sound sound and metal to metal feeling in situations that other bikes even while being set softer wouldnt make that harsh sound/feeling.

Anyone know if these shocks have a b.o. bumper thats too little/soft/ been reduced this year...?

thanks everybody!

 

[Tantrum Cycles]

If you mean the orange volume spacers, then yes, 4 of 4 that are allowed inside

If you mean the orange volume spacers, then yes, 4 of 4 that are allowed inside

I mean you need one of these inside the main can.

The bands are about a 2% change. those cans are so big and make the curve so flat, they almost always put an internal spacer in. This makes the bands more "responsive" when you use them, because now, their 2 % is of a smaller volume, thus larger increment of change and more feelable.

 

[madpharma]

I mean you need one of these inside the main can.

The bands are about a 2% change. those cans are so big and make the curve so flat, they almost always put an internal spacer in. This makes the bands more "responsive" when you use them, because now, their 2 % is of a smaller volume, thus larger increment of change and more feelable.
View attachment 131031

thanks!I didnt knew about them, but it seems that in my shock size you cant use them, they are only safe to use up to 8.5 in shocks..

 

[HardtailHack]

Have you let the air out to see if you get the full stroke?

 

[Tantrum Cycles]

thanks!I didnt knew about them, but it seems that in my shock size you cant use them, they are only safe to use up to 8.5 in shocks..

It's been awhile, but I think you can use them in all lengths and strokes, but only some sizes of spacer. Fox used to have a chart. For example, and 8.5 x 2 inch stroke could use a bigger spacer than 8.5 x 2.5 " stroke, because the 2.5 inch stroke was getting too small at full compression for the largest spacer.

If you dig on Fox's website, i believe it's there.

 

[Dogboy]

I mean you need one of these inside the main can.

The bands are about a 2% change. those cans are so big and make the curve so flat, they almost always put an internal spacer in. This makes the bands more "responsive" when you use them, because now, their 2 % is of a smaller volume, thus larger increment of change and more feelable.
View attachment 131031

Those are for the DPX2 not the X2, at least as far as I know.

 

[Tantrum Cycles]

Those are for the DPX2 not the X2, at least as far as I know.

You are correct. Fox lists some other mysterious vol spacers and anti-volume spacers?? on their website, but I couldn't find pictures.

Sorry for steering you wrong @madpharma

 

[troy]

Typical clunk bottom out noise for 2016-2018 Float X2 shocks. Internal volume spacers are available, but they reduce the travel as well, so they suck. 2019 model comes with a MCU B/O bumper. I assume You won't buy a new shock for You new bike, so get some avy love for that shock and You will be fine.

http://www.avalanchedownhillracing.com/Fox DHX/Fox Float and DHX X2 SSD and HSB Kit.htm

 

[Happymtb.fr]

Considering the low pressure you are running, I wouldn't be afraid of removing the spacer limiter and putting more than 4 in there.

If you can get hold of the first gen X2 spacers, the black rubber like ones, they have roughly double the volume of the orange plastic ones. I have heard that some plumbing seals/gaskets have similar dimensions and can do the job.

 

[madpharma]

You are correct. Fox lists some other mysterious vol spacers and anti-volume spacers?? on their website, but I couldn't find pictures.

Sorry for steering you wrong @madpharma

Nothing to be sorry about, you were trying to help! thanks!

 

[madpharma]

Typical clunk bottom out noise for 2016-2018 Float X2 shocks. Internal volume spacers are available, but they reduce the travel as well, so they suck. 2019 model comes with a MCU B/O bumper. I assume You won't buy a new shock for You new bike, so get some avy love for that shock and You will be fine.

http://www.avalanchedownhillracing.com/Fox DHX/Fox Float and DHX X2 SSD and HSB Kit.htm

this could be a good solution, as my feeling its more related to the bottom out being always harsh, not that I bottom out too often. seems that the stock b.o. bumper irs nor very well designed.

im going to try and order one as I think this might solve it.

Thanks again!

 

[troy]

this could be a good solution, as my feeling its more related to the bottom out being always harsh, not that I bottom out too often. seems that the stock b.o. bumper irs nor very well designed.

im going to try and order one as I think this might solve it.

Thanks again!

There is NO stock b/o bumper in 2016-18 models (3mm o-ring I wouldn't consider a bumper).

 

[madpharma]

There is NO stock b/o bumper in 2016-18 models (3mm o-ring I wouldn't consider a bumper).

hahaha no I wouldnt call that a b.o bumper