abgesehen das der RC4 echt ne harter Brocken in Sachen Einstellungen ist....
hab ich mir mal vom Markus in Barr was erklären lassen und grad Gestern mit nem Teamkollegen, der Markus (Klausmann) seine Kiste gekauft hat, nochmal über seine Einstellungen/Federhärte etc gesprochen.
Federhärte wenn möglich passend bzw. wenn zwischendrin 50Lbs weniger mit leicht mehr LSC/HSC + persönlichen Vorlieben passendem Druck und ne Portion Bottom Out...
oder auf die 50Lbs mehr mit kleineren LSC/HSC Einstellungen + persönlichen Vorlieben passendem Druck und ne Portion Bottom Out...
von Minimaldruck 125 PSI mit linearerem Verhalten bis Max 200 PSI mit progrssiverem Verhalten... -> abhängig vom Leverage Ratio/Rahmen
(Zitat ausm RideMonkey Forum) ->
Originally Posted by
bizutch 
CCDB tends to use a softer spring than Fox and you need to learn to dial in the dampers to do the rest. Not once have I ever had Cane Creek recommend a higher spring rate.
Ian, you're old school and not a douche. You've been around long enough to know what's what, but I REALLY think you need to talk to Malcolm about your spring setup and tuning options. Your setup sounds like you're just relying on the spring to do the work and not letting the DB do the job.
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I disagree.
A suspension damper is not some kind of black art, and a CCDB is no different to any other shock when it comes to the correct/ideal levels of spring rate and damping - don't let the twin tube layout confuse you. If you go from a correct-sag setup on virtually any other shock to a CCDB and use a lighter spring (or even the same spring), your effective spring rate will be lower. If you have a lower spring rate at the shock (all spring factors considered, not just the spring itself), you are going to have a lower spring rate at the wheel.
The result will be a web of compensation and a less-than-ideal setup. You'll start off with excess sag, and wind up with any combination of the following as a result:
- Unintended dynamic/sagged geometry
- Reduction in available positive travel
- Excess compression damping to control wallow
- Excess compression damping to control bottom out
See above posts for a detailed explanation (which coincides with my personal experience on the shock) - if you disagree, by all means provide evidence to refute the points rather than "Malcolm said so". He is a great guy and provides *incredible* service to backup the product, but at the end of the day, numbers don't lie.
Some simple air preload calculations below to prove my point. Please correct me if there are errors, this is not my background and it's late here.
Some specs first.
CCDB: 8mm shaft, ~87psi average (spec is 5-7 bar)
RC4: 15.87mm shaft, ~150psi average (spec is 125-200 psi)
Force (lbs) = Pressure (psi) x Area (in^2)
CCDB
0.1575in shaft radius
0.0779in^2 shaft surface area
F = 87*0.0779
F =
6.78 lbs
RC4
0.3125in shaft radius
0.3068in^2 shaft surface area
F = 150*0.3068
F =
46.02 lbs
As you can see, the RC4 has an extra ~40lbs worth of air preload effect adding to the spring rate, and that's not even considering any spring rate progression due to IFP chamber volume decrease. If someone has the correct spring rate giving the correct sag on their RC4, I don't think there should be any dispute that they need a higher rate spring on a CCDB.
Thus I stand by my earlier suggestions quoted below.
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Originally Posted by
Udi
As a rough guide, for a CCDB I'd run a 50lb higher rate coming from an RC4/5th/Swinger at correct sag, and a 25lb higher rate coming from a Vivid/BOS/Roco at correct sag. Those numbers won't be exact, but coil spring rates can only be so accurate anyway.
mit meinem gewicht würde ich auch keine kleineren scheiben fahren wollen aber er damit klarkommt ist doch gut,schnell isser damit auf jedenfall
oh man.... 
