TWO.ZERO
The Quantum Two.Zero is the latest evolution of that game changing design.
Damping curves
When describing the operation of a shock absorber it is often helpful to understand how information is displayed on a dyno plot—the force vs. velocity curve produced by a shock absorber dynamometer.
Basic operation
The Two.Zero belongs to a family of mono-tube shock absorbers with excellent interchangeability of parts.
Routine maintenance
With proper care and maintenance, your Quantum shocks should prove exceptionally durable.
TWO.ZERO
The Two.Zero offers independent external adjustment of compression and rebound damping.
This is made possible by placing two adjusters inside the shaft.
HOW IT WORKS
Type
Bleed adjuster
Affects
Bleed across the piston in compression only
Effective area:
1,185.7mm2
Number of clicks:
24±1
Full stiff:
Position 0, fully clockwise
COMPRESSION
Negative pressure inside the rebound chamber causes the RD check shim to open and the CD check shim to close. Oil flows through drillings in the perimeter of the RD jet, bypassing the RD needle.
A restriction occurs where the oil passes between the CD needle and its jet. The oil enters the rebound chamber via cross-drillings in the shaft.
It is possible to adjust the restriction externally. Turning the CD adjuster clockwise introduces the CD needle further into the jet, increasing the restriction.
REBOUND
Positive pressure inside the rebound chamber causes the CD check shim to open and the RD check shim to close. Oil leaves the rebound chamber via cross-drillings in the shaft and flows through drillings in the perimeter of the CD jet, bypassing the CD needle.
A restriction occurs where the oil passes between the RD needle and its jet. The oil enters the compression chamber via the RD jet. It is possible to adjust the restriction externally.
Turning the RD adjuster clockwise introduces the RD needle further into the jet, increasing the restriction.
TWO-WAY ADJUSTABLE
TWO-WAYS. DONE PROPERLY.
There is one simple reason why Two.Zero shocks don’t have bump canisters: We found a better way.
DON’T ARGUE WITH PHYSICS.
Damping is a resistance to force and force is a function of pressure and area. Canister shocks resist bump forces by restricting the flow of oil displaced by the shaft—in effect applying pressure to an area equal to the diameter of the shaft. Two.Zero is different, only restricting flow across the piston—which is much larger.
WHY IS THAT SO IMPORTANT?
Applying pressure to a larger area means less pressure is required. The reduced hydraulic pressure means the damper is more efficient, particularly at low speeds and when it changes direction, right where you need it the most.
VALUE ADDED CONFIDENCE.
Two.Zero has two colour coded adjusters that each effect bleed across the piston in one direction only—benefiting you with superior performance and truly independent two-way adjustment. No bells. No whistles. No canisters. Just good. Common. Sense.
GET A QUOTE
2.25″ ID 4″ Free Length (101mm) Standard Spring
Metric coiling size 58.5mm ID to clear.
All standard stock round section material springs are powder coated polyester gloss Black (RAL 9005)
| Zero | One.Zero | Two.Zero | |
|---|---|---|---|
| Price | From £292.00 ea.excl. VAT | From £413.00 ea.excl. VAT | From £667.00 ea.excl. VAT |
Standard specification includes ∅15mm rod ends, coil-over hardware, aluminium bodies, linear piston and purple anodizing. Top-hat spacers and springs are not included. Deviations from the standard specification are priced accordingly. | Standard specification includes ∅15mm rod ends, coil-over hardware, aluminium bodies, linear piston and purple anodizing. Top-hat spacers and springs are not included. Deviations from the standard specification are priced accordingly. | Standard specification includes ∅15mm rod ends, coil-over hardware, aluminium bodies, linear piston and purple anodizing. Top-hat spacers and springs are not included. Deviations from the standard specification are priced accordingly. | |
| Construction | Aluminium monotube Also available with steel body. | ||
| Gas-pressurized | Yes | ||
| External adjustment | No | One-way Low-speed bleed. | Two-way Low-speed bleed, independently adjustable in compression and rebound. |
| Internal adjustment | Low-speed
High-speed Piston | High-speed
Piston | High-speed
Piston |
| Caliber | 1.625″ | ||
| Revalvable | Yes | ||
| Servicable | Yes | ||
| Spring | ∅2″ minimum. ∅2.25″ standard. Sold separately. | ||
Through the 90s and 2000s,
the company has supplied teams in the:
want to know more?
If you want to see what separates Quantum Zero shock absorbers from the competition on the inside, the comprehensive owner’s manual explains in detail how they operate, how to interpret dyno charts and offers practical advise on routine care and adjustment.