Specifications
- Brand
- FOX Powersports
- Part #
- 853-21-016

Fox Factory AM Lynx Boondocker DS 3900/4100 FT (13.88/3.64) FLOAT 3 QS3 LW RT 21.68/6.07 FLOAT 3 2pc
$1549.99
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Fox Factory AM Lynx Boondocker DS 3900/4100 FT (13.88/3.64) FLOAT 3 QS3 LW RT 21.68/6.07 FLOAT 3 2pc. Advanced suspension for improved ride control.
Key Features
- Fits snowmobile applications with specific front and rear shock requirements.
- Features a 2-piece design for the front (FT) and rear (RT) suspension components.
- Front shock has an extended length of 13.88 inches and a 3.64-inch shaft.
- Rear shock has an extended length of 21.68 inches and a 6.07-inch shaft.
- Utilizes an advanced air spring system for adjustable ride height and spring rate.
- Equipped with QS3 (Quick Adjust 3-Position) compression damping for on-the-fly adjustments.
Product Details
The 2-piece FLOAT 3 QS3 LW RT shock absorber from Fox Factory is built around an advanced air spring system, offering a notable advantage in adjustability and weight savings compared to traditional coil springs. This specific model, part number 853-21-016, is designed for snowmobile applications, featuring a 13.88-inch extended length and a 10.25-inch stroke for the front (FT) application, with a 3.64-inch shaft. The rear (RT) component measures 21.68 inches extended with a 15.61-inch stroke and a 6.07-inch shaft, providing a substantial range of motion for varied terrain.
At its core, the FLOAT 3 system utilizes a high-pressure air spring that can be easily adjusted to match rider weight and riding style. This allows for fine-tuning of the ride height and spring rate without the need for physical spring changes. The QS3 (Quick Adjust 3-Position) compression adjustment lets you dial in the damping for different conditions: position 1 for a softer, more compliant ride; position 2 for a balanced feel; and position 3 for firmer damping during aggressive riding or rough terrain. This versatility means you can adapt your snowmobile's suspension on the fly to suit changing snow conditions or your preferred riding approach.
The lightweight construction, indicated by 'LW', contributes to overall vehicle performance by reducing unsprung mass, which can lead to improved handling and responsiveness. The robust build quality, characteristic of Fox Factory components, ensures durability for demanding snowmobile use. This shock absorber set is a significant upgrade for riders looking to gain precise control and a more comfortable, capable ride over challenging snow conditions.
Specifications
- Brand
- FOX Powersports
- Manufacturer Part #
- 853-21-016
Frequently Asked Questions
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