What do you mean by 'pop'?
It’s actually quite a complicated explanation.
The reduction of leverage ratio through the stroke (progressive leverage rate) increases the damping further into the travel since a lower lev ratio gives faster shaft velocities, hence more damping. Thats one part, where you’re pushing from, midish stroke, you’ve more damping. This is dealing with the dynamic part, net result is you dont go as far into the stroke.
Then you have the rate of increase in spring rate, progressive is going to get to supporting the load sooner than linear or regressive, the stable platform of which you push off is reached sooner into the travel.
I guess by pop, it means you’re not getting bogged down in the travel, where when you move further into the travel the greater the extension, the greater the impact the rebound damping has,
If you just simply decreased rebound damping, you’d get into the realms of the system no longer being controlled.
/my mediocre attempt to explain what’s going on in my head.Posted 4 years agocrashtestmonkeyMember
+1 brant, progressive usually means increase in spring rate throughout the stroke. I’m with “pop” being people exploiting/riding around poor rebound from typical air rear shocks (why a properly damped coil like the CCDB can be criticised for being ‘dead”) to the extent its seen as a desirable trait.Posted 4 years agoRusty SpannerSubscriber
It means whatever the designer wants it to mean.
As does ‘progressive’.
Progressively higher or progressively lower spring rate as the spring compresses?
Anything with a non linear spring rate?
Meaningless without qualification.
Rising and falling rate at least give you a clue as to the designers intentions.Posted 4 years agoNorthwindSubscriber
I have a Hemlock, it’s got no pop at all, very groundbound- tons of traction, very predictable, only jumps if you make it, which to me all sounds like a good thing but some find that boring and want a bike that’ll fire you into the sky if you ride over a painted line.Posted 4 years agoNobeerinthefridgeSubscriber
My SB66 feels like that too NW, my old heckler felt a little livelier in terms of ease of getting wheels off the ground at low speeds, but I think that was down to the very short top tube compared to the yeti. Although everything I read about the yeti says it wakes up at faster speed, I’ve not had a chance to test that theory as yet.Posted 4 years agoRusty SpannerSubscriber
Legend – which manufacturers use that convention?
Again, I come at suspension from a motorbike perspective, where the same terms can imply something slightly different, so pardon my ignorance.
I’d use ‘pop’ to describe a unit that had insufficient rebound damping, possibly with a slightly ott spring rate,Posted 4 years agojivehoneyjiveMember
I’d go with progressive meaning increasing spring rate, which would at the same time mean reducing leverage rate.
i.e. the longer the lever, the less the effort… as the lever gets shorter, the effort (spring rate) increases.
As for pop, my favourite is unicorn wee, but I sometimes settle for Irn-Bru
But yeah, with a progressive system as mentioned above, the more force you compress it with, the more energy it will return to you for gnartastic reverse g shrednanigans, damping permitting.Posted 4 years agodeanfbmMember
Progressive leverage rate – lr starts high at beginning of travel, decreases at end of travel, ie starts at 3.0 ends at 2.0. Mechanical advantage rear wheel has over shock decreases through displacement. Shaft velocities start low, get greater, less damping beginning stroke, more damping end stroke.
Regressive leverage rate – starts low gets high, ie begins 2.0 increases to 3.0. Mechanical advantage rear wheel has over wheel increases through stroke. Shaft velocities start high get slower. Damping vice-versa of above.
I found it counter intuitive when i was learning about this stuffPosted 4 years ago
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