Rear shocks for a heavy duty ebike

[BCTECH]

a lot of reviews of these rear shocks are for MTB. is there any different aspects I should be looking at when choosing them for an ebike with a much more heavy weight than a regular bike?
Especially with a much heavy rear end on a ebike where the design of the shock is meant for a normal rear end weight on a bike?

shocks option: - Fox RC4 or Cane Creek DB
RC4 has a bigger shock shaft VS CCDB has more shock oil capacity
what is the relationship between them when applying to a heavier ebike?

 

[motomech]

Well, it's a little difficult to understand what you are asking, but I can tell you this.
For pavement and lite trail riding, all the modern, quality shocks work fine.
I only adjust air pressure on my Fox Floats, never even have messed with the damping adjustments.
And I weigh #250.
If you are building a serious trail bike, keep reading at MTB forum.

 

[MadRhino]

Well, this is not only about the shock itself. It has a lot to do with suspension design, geometry, wheel weight, rider weight...

A heavy wheel requires a shock with higher capacity, more oil and air volume is better. Suspension design and ratio are even more important: A smaller shock could give better work 1:1.5 than a bigger one that is on a 1:2 ratio. Mods to linkage in order to reduce the ratio (suspension travel vs shock travel), are sometimes necessary when no shocks are available big enough for the job. Heavy riders and lighter wheels do require less rebound control, while a light weight rider on a heavy wheel might be forced to serious mods. In any case, reducing the ratio makes it easier on any shock.

So the first thing is to set the suspension to work properly. This is making it "heavy duty" by itself. Then, the ideal combination of suspension components should succeed to set it to work properly when the settings about the middle of their range. This might be difficult to achieve for some, but let's say that if none of the settings are at their minimum or maximum once the suspension is set to work properly, you are in business to last.

The next step to suspension reliability, is to make it stop on the frame and never on the shock. If you bottom or top out the suspension travel, it should be on a stopper that in on the frame. If your suspension stops on the shock, no shock will last as it should.

 

[Ch00paKabrA]

Most the issue would be less the shock and more the spring when you are talking about an ebike. Yes, the weight of a rear hub motor will affect it but unless you are really in tune with your suspension, you probably won't feel it.

You may have to go with a stiffer spring if you have a lot of added weight from a larger battery, mid drive, and or both. If you can get the sag correct, you should be able to mess around with compression and rebound to get a good ride.