Join Date: Jul 2010
Location: San Diego
Feedback: 2 reviews
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FOX's new IFP/Negative spring bumpstops coming soon!!!!!!!
- In a slow hit- A traditional bumpstop is felt and makes a noise at
engagement because it has to overcome the force from the charge
pressure, typically around 200 lbs. The negative spring in the new
bumpstop counters that force, making the force required around 10 lbs.
This means that the bumpstops are not felt during rock crawling and onroad
situations. However as they are collapsed, the force ramps up to
levels higher than traditional bumpstops to prevent bottom-out.
- During a high speed hit, a traditional bumpstop takes approximately half
its travel to ramp up to full damping force. This is because it is an
emulsion shock- the oil is mixed with nitrogen. The new style shock uses
an IFP (Internal Floating Piston) design, therefore creates full damping
force from initial contact all the way through its travel. This extra force
helps to slow the suspension travel sooner and smoother.
- In combination, these two features make the new bumpstop design
superior in slow hits and on-road manners, while still having more overall
stopping power for the big hits.
Fox IFP bumps