Thread: is someon using dual rear shocks in his 110?

Originally Posted by uninformed

For fun? what about Fox or kings? or really step it up and get some Ohlins

As uninformed said.
If you want to move up in quality from what you've had.

Originally Posted by PAT303

Rick,whats your take on Rancho's?. Pat

Not Rick, but IME they are cheap and nasty POS.

If your suspension is ok but fades it is because you are not able to get rid of the heat quickly enough. You can improve the situation by providing a bigger fluid reservoir which means the shock will soak up more energy to raise the temperature of a greater amount of fluid. More fluid helps average temperatures out a bit so that longer periods of work can be handled. Unless you have periods where the shocks are required to do less work the temperate is likely to keep increasing.

A bigger reservoir of fluid can be provided by increasing the diameter of the shock, however the ability to shed heat is dependant on surface area. For the same volume of fluid you get a greater surface area from twin shocks than from a single big shock (this does not include the surface area and volume that is provided from external canisters).

As temperature rises at some stage you get to an equilibrium where the amount of energy shed through heat through the surface area of the shocks equals the energy from the work the shocks are doing soaking up the energy resulting from dampening the suspension. Therefore I think that twin shocks are likely to provide a cooler running set of shocks than a single big shock that contains the same amount of fluid as the two shocks total.

Packaging and costs are other considerations that may drive you to twins or single shock configurations.

this seems to have morphed in to a different post I would appreciate if you do not hijack mine but rather post a new topic for your suspension issues as this post was really about dual-shocks on a 110.

thanks a lot

Originally Posted by rick130

Tyres are a spring, and are pretty much undamped, there is a little friction in the sidewall flexing, but not much.

Changing pressure changes the rate, and on a very, very odd occasion, if the tyre and spring rates match you are in a world of hurt as things start to cycle uncontrollably.
It is a very rare thing though, but yes, lower the tyre pressures a lot and it feels like an undamped ride spring.

What I should have said was that springs have a natural frequency, and if the spring and tyres natural frequency match, then you are in a world of hurt.

Actually had a car bounce off the road because of that, it's very, very disconcerting.

Originally Posted by rick130

What I should have said was that springs have a natural frequency, and if the spring and tyres natural frequency match, then you are in a world of hurt.

Actually had a car bounce off the road because of that, it's very, very disconcerting.

This also could well be what Iam experiencing. Now with the Raids wound down and being more aware of effect of tyre pressures, hopefully I might just might have this beaten !

Would more air in the Poly-Bags help or hinder ?

Steve223 - you are correct that this thread has evolved away from dual shocks, but it is a general discussion on shocks, springs and their application. A great deal of the information is very applicable to dual shocks set ups.

If this thread was limited to just dual shocks it would have been dead and buried some time back.

Originally Posted by slug_burner

If your suspension is ok but fades it is because you are not able to get rid of the heat quickly enough. You can improve the situation by providing a bigger fluid reservoir which means the shock will soak up more energy to raise the temperature of a greater amount of fluid. More fluid helps average temperatures out a bit so that longer periods of work can be handled. Unless you have periods where the shocks are required to do less work the temperate is likely to keep increasing.
[Snip].

What you are missing though it's that when you go to a bigger diameter damper you are usually going to a bigger piston size too.
Read what I said about piston size, internal pressures and heat earlier in the thread.

Originally Posted by Drover

This also could well be what Iam experiencing. Now with the Raids wound down and being more aware of effect of tyre pressures, hopefully I might just might have this beaten !



Would more air in the Poly-Bags help or hinder ?



Steve223 - you are correct that this thread has evolved away from dual shocks, but it is a general discussion on shocks, springs and their application. A great deal of the information is very applicable to dual shocks set ups.



If this thread was limited to just dual shocks it would have been dead and buried some time back.

Sorry mate it was actually not a general thread about shocks it was about dual shock set up and if it's dead that's fine but I'm still hoping to see some images of dual shock set ups at some stage.

Not sure what the difficulties is to create a new general suspension post if you have issues with your set up so that people who may look for dual shock set ups actually find a relevant post.