ZEB A1 Air Spring Upgrade Kit DebonAir+ ButterCup

The ZEB DebonAir+ Air Spring Upgrade Kit with ButterCup is a complete air spring assembly for 2021 and newer ZEB A1+ forks. It replaces the existing air spring with the latest DebonAir+ system, offering improved ride height support, better small-bump sensitivity, and a smoother transition through the travel.

The revised air spring curve increases mid-stroke support and maintains chassis stability under load, giving the rider more control and confidence in steep, rough terrain. A pre-installed ButterCup sits at the base of the assembly to absorb high-frequency vibration and trail chatter, reducing hand and arm fatigue on long descents.

This kit is also the required part when changing the travel length of your ZEB fork.

Features

• Complete DebonAir+ air spring assembly

• Refined spring curve for better support and improved ride height

• Pre-installed ButterCup to reduce trail vibration and harshness

• Improved control and compliance across full stroke range

• Positive and negative volume tuning for better small-bump feel

• Required component for travel changes

• Designed for enduro, gravity, and e-MTB use

Specifications

• Air spring type: DebonAir+

• Includes: Complete air spring assembly with ButterCup

• Travel options: Available in multiple lengths depending on fork model

• Intended use: Enduro, downhill, e-MTB

• Weight: Slightly varies by travel size

• Mount: Direct replacement for ZEB A1+ (2021 onwards)

Compatibility

Compatible only with ZEB A1+ forks from 2021 onwards that use the DebonAir+ platform. Not suitable for older ZEB models or other fork series. Select the appropriate travel length for your frame geometry and intended setup.

Installation Notes

Professional installation recommended unless experienced. Requires full disassembly of the left fork leg. Apply fresh lubrication to seals, verify correct assembly, and torque to factory spec. After installation, reset sag and air pressure, and adjust volume spacers if needed. Best performed during a routine lower leg service.

Shipping

NSDynamics uses express freight services to ensure fast, reliable delivery for all service jobs and sales orders across Australia. Parcels are shipped via Australia Post eParcel/Parcel Send.

Dispatch and Delivery Timeframes

All items are dispatched once full payment has been received and confirmed. Same-day dispatch is available for orders or completed service jobs paid before 1:00 pm AEST. Any payments received after this cut-off will result in next business day dispatch.

Expected delivery time for most Australian addresses is 1 to 3 business days. Delivery time may vary depending on the customer’s location and other external factors outside NSDynamics’ control. Typical delivery timeframes around Australia are:

• WA: 2-5 working days

• NT: 2-5 working days

• SA: 2-3 working days

• TAS: 1-3 working days

• ACT: 1-3 working days

• NSW: 1-2 working days

• QLD: 1-2 working days

• VIC: 1-3 working days

Tracking and Notifications

All outgoing parcels are tracked. Tracking details will be provided once the item has been dispatched. NSDynamics does not send arrival notifications for inbound service items unless the parcel is damaged in transit or missing important components required for service.

Customers are encouraged to use tracked and insured freight when sending items to NSDynamics. Responsibility for the parcel remains with the sender until the item is received and checked in at the NSDynamics workshop.

Shipping Fees

Return express postage back to the customer is included free of charge for all full Factory and Hyperformance service types. It does not apply to minor repairs or basic services. Shipping charges for parts or accessories are calculated during checkout.

Postage to NSDynamics is the responsibility of the customer unless otherwise arranged. Warranty items may qualify for return postage coverage only if they were originally supplied by NSDynamics and a clear fault is confirmed.

Shipping Insurance

All parcels sent from NSDynamics are covered under NSDynamics’ freight insurance. In the unlikely event that an item is lost or damaged during return transit, it will be replaced with a comparable item where possible. If a parcel arrives damaged, photo evidence must be supplied immediately. NSDynamics is not responsible for parcels where the receiver has chosen the 'Authority To Leave' option. 

Packaging Requirements

Customers must ensure that their suspension is packaged securely and appropriately for shipping. If an item arrives in packaging that is damaged or unsuitable for safe return, NSDynamics may use a heavy-duty branded box and apply a $5 fee to the final invoice. This ensures your suspension is protected during return freight. Customers are encouraged to retain and reuse this box for future service bookings.

Transit Times and Delays

While NSDynamics uses express freight to minimise delivery delays, transit times cannot be guaranteed. NSDynamics is not responsible for delays caused by freight carriers, public holidays, weather events, or other external disruptions. If a parcel has been delayed more than 5 business days beyond its expected delivery date, customers are welcome to contact NSDynamics for support.

Public Holidays

Unfortunately our workshop is closed on all nationwide and Queensland-specific public holidays, so we are not able to ship sales or service orders on these days. Any services or sales orders placed on public holidays will be processed and dispatched the following business day.

New Zealand and International Shipping

NSDynamics offers international shipping to New Zealand via Australia Post. Standard delivery times range from 5 to 10 business days. Customers are responsible for providing accurate delivery details and ensuring someone is available to receive the parcel.

Goods sent to New Zealand may be subject to import duties and GST. NSDynamics does not collect or cover any customs charges. It is the customer’s responsibility to be aware of local import requirements and costs. Orders returned, delayed, or destroyed due to unpaid duties or taxes are not the responsibility of NSDynamics.

In the event that a product needs to be returned from New Zealand, including for warranty inspection, all return postage costs are the responsibility of the customer. NSDynamics does not cover international return freight for items not originally purchased from NSDynamics.

International orders are processed in New Zealand Dollars (NZD), and prices do not include Australian GST. Currency conversions may vary depending on the payment platform used at checkout.