Do I need those rubber cone shaped things in rear springs?

[NZcruiser]

I've had airbags running in my rear springs so the rubber cone (dampeners?) which fit inside rear springs had been removed.
However, the airbags have deteriorated and worn out so I have decided to not replace them but upgrade to a more heavy duty spring. Does anyone know if I MUST have those rubber cone shaped dampeners inside put back inside them as I don't currently have any so i'm wondering if they are an essential item?

 

[NLXTACY]

Those are your bump stops.

 

[atomicshawn]

unless you never go through any large dips or bumps, never carry a load, or never take it off road, yes you will want those.

 

[greentruck]

What those guys said...

Sometimes people trim the bump stops looking for more travel, but you want something left there or there is going to be some clanging eventually when you get into the rough

 

[Tools R Us]

Don't know how the NZ trucks are setup? But mine has bump stops on the frame. The rubber cones in the springs are called "hollow springs" they increase spring rate in the last bit of travel to reduce the shock when bottomed out. They are not needed, depending on the new suspension setup, may not be able to hit them anyway?

 

[Nezzar]

Hate to resurrect this old thread, but I just got done putting in a new suspension including timbren bump stops. Do I need this cone as well? I didn't put it back in after removing the springs. Does it act as a guide of sorts for the spring at full extension, allowing it to remain in place?

Thanks for the help.

 

[Blade 80LC]

Hate to resurrect this old thread, but I just got done putting in a new suspension including timbren bump stops. Do I need this cone as well? I didn't put it back in after removing the springs. Does it act as a guide of sorts for the spring at full extension, allowing it to remain in place?

Thanks for the help.

If your shocks are long enough to allow your springs to unseat, it might help keep the spring from falling out. That isn't what they're for, and won't keep the spring aligned in the bucket, but may keep the spring from simply falling out. Mostly it's a bump stop. If you have another way to stop compression, you have bump stops covered.

 

[Nezzar]

This is the advice i was looking for. Thank you!