Specialized rear shock help needed

[Johan Bornman]

Please can we stick to English not French?

Qui me?

[Wayne Potgieter]

 

Wayne - I have my tongue in my cheek now....the plural of Nazi has no apostrophe.

 

It does in benoni.

 

[Mags vd walt]

 

 

Thanks Wayne, now I understand.

 

To the OP:

 

Most Specialized shocks have a special mounting that's unlike those on other bikes. Therefore I doubt that you can replace it easily with something else. There are exceptions such as the older Stumpies with the shock behind the seat tube. I think those can be converted.

 

Send us a picture of yours and I'll take a look. However, the solution is in finding the real problem.

 

Shocks are two-part affairs. The one part is the spring (in your case, it is an air spring that you pump) and the other part is the damper. Only the spring has an effect on the amount of sag you get on the bike. Sag is how much the shock depresses when you sit on it.

 

The damper could have an effect on sag if it is a lockout type shock, but lets take that out of the equation. Then you are left with the spring. Either the spring is hard or it is not. In your case, you don't say whether you've tested to see if it holds pressure. I suggest you pump it and then smear a strong soapwater concentration on the shock and look for air leaks. These will show up as bubbles.

 

If there is an air leak, we've found your shock's problem.

 

The other problem could be that the inertia valve (lockout) on that shock doesn't work anymore and it now feels different to what you're used to. But lets first determine whether it leaks air or not.

 

Wayne - I have my tongue in my cheek now....the plural of Nazi has no apostrophe.

 

Ok..

The shock does keep pressure.

It only started this "thing" today when I went to cyclepark and it bottomed out and I looked down to see it was halfway compressed.

[Johan Bornman]

Ok..

The shock does keep pressure.

It only started this "thing" today when I went to cyclepark and it bottomed out and I looked down to see it was halfway compressed.

 

OK, and you are absolutely sure that when you put in more pressure, it still sags to the same position? Do the experiment carefully and mark the positions with a felt tip pen or something.

 

Once we're sure of that, we'll start fiddling with the lockout threshold settings on the brain.

[Johan Bornman]

It does in benoni.

 

 

Capital B please.

[Mags vd walt]

 

 

OK, and you are absolutely sure that when you put in more pressure, it still sags to the same position? Do the experiment carefully and mark the positions with a felt tip pen or something.

 

Once we're sure of that, we'll start fiddling with the lockout threshold settings on the brain.

 

Righty...I put 160psi sat on the bike and marked then did 200psi and marked.. There is 5mm difference between the 2..

[Johan Bornman]

Righty...I put 160psi sat on the bike and marked then did 200psi and marked.. There is 5mm difference between the 2..

 

OK, that means there is no air leak and by increasing the pressure in the shock, you can reduce the sag. My first question is why not then just pump it harder until it feels right again?

[Mags vd walt]

Thought about it, wanted the opinion of the professionals before I do it.i am 83kg's so I will just then keep pomping?

[Johan Bornman]

Thought about it, wanted the opinion of the professionals before I do it.i am 83kg's so I will just then keep pomping?

 

That's it.

 

Potentially there's the issue of the lockout/inertia valve not working but first pomp, then ask questions.

[Mags vd walt]

Up to 290psi

Now I've got 13mm sag..

That is about 90 psi more then they recommend, is that ok?

[Wyatt Earp]

Up to 290psi

Now I've got 13mm sag..

That is about 90 psi more then they recommend, is that ok?

 

What do you weigh (with kit)?

What is the exact model of the shock ?

Is it a Specialized branded shock with a brain or a Fox shock with a brain ?

 

The correct sag should be around 30 mm.

 

Sorry, but I didn't bother reading the rest of the cr@p here, so if it was mentioned, just do it again.

[Wyatt Earp]

Ok..

The shock does keep pressure.

It only started this "thing" today when I went to cyclepark and it bottomed out and I looked down to see it was halfway compressed.

 

The bottoming out could very well not be bottoming out you are feeling but the inertia valve .

[Mags vd walt]

Weight with kit will be 88kg

It says specialized future shock fox on it...where can I look for a model no on it?

[Wyatt Earp]

Weight with kit will be 88kg

It says specialized future shock fox on it...where can I look for a model no on it?

 

That's all I need.

Weight with kit should give you around 250 psi.

Turn the threshold knob to full firm and 4-5 clicks back.

That bottoming out sensation will not come back with a vengeance.

Edited September 17, 2013 by Wyatt Earp

[Mags vd walt]

Thanx a load will give it a shot tomorrow morning..

[Wayne Potgieter]

That's all I need.

Weight with kit should give you around 250 psi.

Turn the threshold knob to full firm and 4-5 clicks back.

That bottoming out sensation will not come back with a vengeance.

Wyatt to the rescue.

 

Love it.

 

Thats what the man needed. Actual problem solving adviCe.