Pro-Pedal?
steelo
Posts: 542
What exactly is pro-pedal?
From reading threads on here, reading reviews in magazines and trying to figure it out for myself it seems that a decent rear shock is able to do 3 things;
1. Fully open - Suck up all the bumps and motion of the back end of the bike be it rider-enduced or hitting a tree root.
2. Fully closed - Lock out so that there is 10% motion only to protect the shock (like lock-out on a fork).
3. Pro-pedal - Some sort of magical setting that increases the force needed to make the shock work, like a restricter on the oil flow needle within the system.
May I ask, is this correct for lets say the Fox RP23 rear shock?
From reading threads on here, reading reviews in magazines and trying to figure it out for myself it seems that a decent rear shock is able to do 3 things;
1. Fully open - Suck up all the bumps and motion of the back end of the bike be it rider-enduced or hitting a tree root.
2. Fully closed - Lock out so that there is 10% motion only to protect the shock (like lock-out on a fork).
3. Pro-pedal - Some sort of magical setting that increases the force needed to make the shock work, like a restricter on the oil flow needle within the system.
May I ask, is this correct for lets say the Fox RP23 rear shock?
Specialized Rockhopper '07
Trek Fuel EX8 '09
Trek Fuel EX8 '09
0
Posts
Pro pedal lockouts the shock untill you hit a bump where the shock operates as normal for that bump then goes back to locked. This means that you get no bob from pedalling but you still get some bump absorption. The 3 settings for pro pedal allows you to set how sensitive it is to bumps.
Orange Blood - Orange 5SE - Marin Rocky Ridge
pro-pedal doesn't lock the shock out at all. It is (in simple terms) a low speed compression damper.
Basically, bumps from roots, rocks, etc are very fast, sudden impacts. The shock will respond to these under all circumstances.
However, suspension compression due to rider movement or pedalling is a slower movement.
So, pro-pedal allows for fast impacts to work the shock, but resists slow movements.
The pro-pedal setting either (not 100% sure on this one) adjusts the slow/fast speed crossover point, OR adjusts the amount of resistance applied to a slow movement - however I suspect it is a little of both.
Orange Blood - Orange 5SE - Marin Rocky Ridge
I'm starting to understand.
Trek Fuel EX8 '09
when it 'thinks' you're pointing downhill, it becomes a "normal" shock.
It also serves the purpose of being perfectly placed to be damaged in a crash.
The 3 settings are, full propedal, intermediate propedal, or minimum (or off) propedal.
the DHX 5 has a continuously variable propedal from fully on, to inactive.
again, I'm not sure if it's speed sensitivity, amount of damping, or both that the adjustment affects.
The reality is fairly close to the theory - but it's never really locked out though, and it will never really feel totally active in the rough stuff, even though that's the idea. I find it does react to bumps, but not as well as fully active. Otherwise you wouldn't need fully active...
I still find it really useful - I leave the pro pedal set to max, but mostly use it when I want more ground clearance uphill on techy bits. The rest of the time I leave it fully active.
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Parktools :?:SheldonBrown
Cheers for all the help!
:?:
Trek Fuel EX8 '09