Sport And Biking Talk: Push Industries ACS-3 coil spring conversion kit

Wednesday, July 19, 2017

Push Industries ACS-3 coil spring conversion kit

The new Push Industries ACS-3 kit.

Push Industries has introduced the ACS-3, a coil spring conversion kit designed to transform front suspension performance. Built in-house, the ACS-3 is designed to replace the stock air chamber of a Fox 36 or RockShox Pike with a proprietary coil spring mated to a pneumatic bump-stop. The result, according to PUSH, is supple, linear suspension throughout the early and mid-stroke of the fork with an air cartridge to prevent bottom out at the end of the fork’s travel.

On this tester Evil Wreckoning, the PUSH rear suspension is always looking for a commiserate front end.

Purpose-built to enhance small bump performance and full-range tuneability, the ACS-3 can be tailored to offer specific performance characteristics throughout the entire range of travel. The kit comes standard with a precision-wound coil spring available in seven different rates, while the pneumatic bump-stop can be adjusted between 5 and 50psi. These options along with the spring’s ability to rotate without binding allow control without stiction.

“The popularity of the Elevensix rear shock lit a fire under us to offer that same level of performance to the front end of our customers’ bikes,” explained PUSH’s Darren Murphy. “The ACS-3 takes two already noteworthy products, and then adds yet another level of performance. It makes the awesome awesomer.”

Push Industries ACS-3 coil spring bumper.

Coil or Air Spring? Yes.

Whether coil or air, each type of spring presents pros and cons. Air springs typically save weight, but the high pressures required for them to function effectively create stiction, that undesired friction drag between pressurized sealing surfaces. A negative factor that must be overcome or mitigated, harshness is noticeable early in a suspension component’s travel, especially on smaller impacts.

Coil springs perform admirably in the early stages of travel and when encountering small bumps, yet their supple feel can end abruptly as they reach the limits of their compression.

PUSH’s ACS-3 combines the supple, more responsive ride of a precision engineered coil spring with a pneumatic bump-stop, effectively mating the best qualities of each method. In doing so, this broadens a fork’s range of action, freeing it up to more smoothly absorb impacts across the entire spectrum of travel.

The Push Industries ACS-3 bumper and spring.

Key Details

Price: $ 389; supplemental spring $ 80
Manufactured entirely in the USA
2015 through 2017 Fox 36 Float or Talas 160mm kits available now
Fox 36 140, 150 and 170mm and 2018 140-170 kits available late July
RockShox Pike kits coming soon
RockShox Lyrik/Yari not offered due to small diameter of stanchion tube.

Push Industries ACS-3 spring options.

There’s More

While the ACS-3 is big news for PUSH, the company remains firmly rooted in its desire to make all suspension perform at its best. To that end, PUSH is placing the tools to do just that into the hands of all riders. PUSH’s new suspension service kit, the complete lower leg service kit, offers a turnkey solution that allows riders to perform service work themselves.

The kit includes new fork seals, a seal driver (made in Colorado), and enough fork oil and grease for five services. Switching to PUSH seals effectively doubles the service interval of your fork.

Push Industries ACS-3 rear end duties are handled by the Elevensix rear shock.

Lower leg service kits retail for $ 105, while future seal-only kits are $ 36. “We created this kit to make it easier for home mechanics to service their own equipment,” added Murphy. “By keeping your seals clean and fluids topped off you’ll keep your fork running smoother. Plus, our seals double the service interval time compared to stock ones.”

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