Name: KONI 8805-1022 FSD Rear Shock for 1993-Current Freightliner XC Class A Motorhome
Brand: Koni
SKU: 8805-1022
Price: 225.00 USD
Availability: InStock
Rating: 5 (3 reviews)

KONI FSD Rear Shock for 1993-Current Freightliner XC Class A Motorhome (Part # 8805-1022)

KONI FSD Rear Shock for 1993-Current Freightliner XC Class A Motorhome (Part # 8805-1022)

: 8805-1022

In Stock(12)

Based on 3 reviews.

$225.00

$229.50

Koni Special - Limited Time Only

Get an additional 2% off when added to your cart
Sale ends 03/31/2026 at 11:59:59

Available Options

VIN Verification (Spartan Chassis Only)

VIN Verification (Freightliner Chassis Only)

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Heavy-Duty Rear Shock Upgrade – KONI FSD for Freightliner XC / Roadmaster RR4R / Alpine Peak

Upgrade the ride and stability of your diesel motorhome with the KONI 8805-1022 Frequency Selective Damping (FSD) Rear Shock, designed for Freightliner XC, Roadmaster RR4R, Spartan, and Alpine motorhome chassis. These premium KONI FSD shocks are engineered to improve ride comfort, reduce suspension bounce, and increase highway stability—especially important for diesel pusher Class A motorhomes.

KONI Frequency Selective Damping (FSD) technology automatically adjusts damping based on road conditions. The shock remains firm during heavy suspension movements such as braking, cornering, or large bumps while softening over expansion joints and rough pavement to provide a smoother ride.

A specialized internal valve system helps reduce harsh road vibrations before they reach the chassis, improving passenger comfort and reducing driver fatigue on long trips. The result is improved rear suspension control, reduced porpoising, and better overall ride quality.

If your motorhome experiences rear-end bounce, harsh ride quality, or unstable highway handling, upgrading to KONI FSD shocks is one of the most effective ways to improve ride comfort, suspension performance, and driver confidence.

Product Benefits:

Frequency Selective Damping automatically adapts to road conditions
Improves ride comfort without sacrificing suspension control
Reduces vibration from expansion joints and rough pavement
Improves rear suspension stability and chassis control
Compatible with multiple diesel motorhome chassis platforms
Premium KONI durability and long service life

Ideal For:

Freightliner XC diesel motorhome chassis upgrades
Roadmaster RR4R chassis suspension upgrades
Spartan and Alpine diesel pusher motorhomes
Reducing rear suspension bounce and porpoising
Improving highway stability and ride comfort
Long-distance RV travel and touring

Applications:

1993-Current Freightliner XC – Rear – I-Beam Front Axle with Air Bags
1993-Current Freightliner XC – Rear – Independent Front Suspension with Air Bags
1993-Current Freightliner XC – Tag Axle Applications
2002-2011 Monaco / Holiday Rambler / Safari / Beaver – Roadmaster RR4R 4 Air Bag Chassis (Ride Height 16"-16.5")
1997-2001 Spartan Alpine and Summit
1998-2006 Alpine Coach Peak Chassis
2011-2012 Monaco Vesta
2011-2012 Holiday Rambler Trip

The KONI 8805-1022 FSD rear shock is designed for a wide range of diesel pusher motorhome chassis including Freightliner XC, Roadmaster RR4R, Spartan, and Alpine platforms. These chassis benefit from improved shock control to reduce suspension bounce and maintain proper ride height stability. This premium KONI shock delivers improved ride comfort, suspension performance, and long-term durability compared to factory shock absorbers.

Specifications:

Collapsed Length	Extended Length	Upper Mount	Lower Mount
13.25"	20.12"	Eye 3/4"	Eye 3/4"

Special Notes:

Sold individually.
Two shocks typically required per axle.
Some motorhomes may require additional shocks depending on suspension design.
Verify chassis and mounting configuration before ordering.

Other Information:

Q: What is KONI Frequency Selective Damping (FSD)?
A: FSD technology automatically adjusts shock damping based on road frequency, providing firm suspension control during heavy inputs while softening over expansion joints and rough pavement.

Q: Will KONI shocks improve the ride of a Freightliner XC motorhome?
A: Yes. KONI FSD shocks significantly improve ride comfort and stability by reducing suspension bounce, porpoising, and harsh road vibration on diesel motorhome chassis.

The state of California requires that this warning be posted for people purchasing products that reside in California.

WARNING: Products may contain one or more chemicals known in the State of California to cause cancer and/or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov

I have 98 Newmar Dutch Star and wondering if these fit and if not which ones do for both front and back.. Unit is 38ft long.
( Mark Olsberg, 02/24/2024 )

Hello,

Yes, those would be correct.

For the front 8805-1020 - FRONT Freightliner XC I-Beam '93-Current (Koni FSD) $185.00 ea. in stock or the 9905-1030 - FRONT Freightliner XC I-Beam '93-Current (Koni EVO) $245.00 ea. in stock

The rears are the 8805-1022 - REAR Freightliner XC / Roadmaster RR4R / Alpine Peak / Spartan Summit-Alpine (Koni FSD) $185.00 ea. in stock or the 9905-1031 - REAR Freightliner XC / Roadmaster RR4R / Alpine Peak / Spartan Summit-Alpine (Koni EVO) $245.00 ea. in stock.

Have a great day.

We have a 2016 Newmar Mountain Aire in the Freightliner SL chassis. Which part numbers in the Koni shocks do I need for the 3 axles? ( Paul Clapham, 05/13/2022 )

Hello Paul , your chassis calls for 99B-3262 - FRONT Freightliner XC Chassis ZF IFS '02-'19 / 2010+ Allegro Bus w/ PowerGlide Chassis ZF IFS (Koni EVO) and 8805-1022 - REAR Freightliner XC / Roadmaster RR4R / Alpine Peak / Spartan Summit-Alpine (Koni FSD) for the drive and tag axles .

Do you know when you might see this shock in stock again? I will need 4 of them. ( Joe Libke, 10/20/2021 )

We are due to receive more inventory around the beginning of November.

Do we need Koni shocks 8805-1022 for the rear Freightliner chassis on both drive and tag axle? Also is one larger than the other and are mounting holes the 19.?? Size on both. Or are the needed shocks the same size for both drive and tag axle? Thanks Walter ( Walter Auen, 04/21/2021 )

The drive axle would take 2 shocks and the tag axle would take 2 shocks. They are the same size for both axles and the mounting holes are 3/4" (19mm) top and bottom.

Recieved my order of Koni shocks for the front (evo-99b). I would like to order the rear shocks for the same MH(2013 Newmar MountainAire- Freightliner chassis). Do you have 8805-1022 Koni shocks in stock and available for immediate shipping? Is this the best shock for our 43 ft MH? Thank you. Walter
( Walter Auen, 04/21/2021 )

The 8805-1022 is the correct & best shock for both your drive and your tag axles. They are in stock and can ship immediately.

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