Bilstein 8100 ZoneControl R Front Right Reservoir Shock | 2019-2026 Ram 2500 2WD/4WD | 25-335897
Sale price
$664.00
Regular price $723.82
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Bilstein 8100 ZoneControl R Front Right Reservoir Shock | 2019-2026 Ram 2500 2WD/4WD | 25-335897
Sale price
$664.00
Regular price $723.82
Free shipping over $200. Lower 48, no code needed. 30-day returns.
Good to know before you buy
Fits
- 2019-2026 Ram 2500 2WD/4WD
Does not fit: Power Wagon
Why the Bilstein 8100
Lifted or leveled trucks driven hard off-road that need more oil volume and cooling than a 5160 and, on DSA variants, external compression and rebound adjustment. The Bilstein 8100 for your 2019-2026 Ram 2500 2WD/4WD is a 60mm monotube remote reservoir shock; DSA variants add Dual Speed Adjustability (independent low- and high-speed adjusters), ZoneControl R variants add position-sensitive rebound zones. Bilstein's monotube design keeps oil and gas separated by a floating piston, so damping does not fade as the shock heats, and the digressive piston firms up on sharp inputs while staying compliant over small bumps.
At a glance
| Design | Monotube, 60mm piston |
|---|---|
| Valving | Velocity-sensitive digressive, tuned for this application |
| Remote reservoir | Yes, extra oil volume for cooling and travel |
| Position | Front Right |
| Quantity | One shock, right side only |
| Finish | Zinc plated |
| Warranty | Two-year limited warranty (Bilstein North America) |
What is in the box
- One Bilstein 8100 shock, right side
- Remote reservoir with 360-degree swivel banjo fitting and billet reservoir mount
- Mounting hardware as required for this application and instructions
Manufacturer part number 25-335897.
Questions
Is this the left or the right side?
This part number is the right (passenger) side. The opposite side is a separate part number; order both for one axle.
Is this for a stock or lifted truck?
Bilstein lists this part number as a direct fit for this application; T14 did not state a specific lift height. Check the collapsed and extended length against your current shock if the truck is lifted.
Where does the reservoir mount?
The hose is a 360-degree swivel banjo and Bilstein includes a billet clamp; on most trucks the reservoir mounts to the frame near the shock. Check hose routing through full travel and steering before you drive it.
Is the reservoir worth it over a 5100?
If you run long dirt, washboard or high-speed off-road miles, yes: the extra oil volume keeps damping consistent as the shock heats. For pavement and occasional trails a 5100 does the same job for less.
What does DSA mean?
Dual Speed Adjustability: separate external adjusters for low-speed and high-speed damping so you can firm up body control without harshening small bumps. ZoneControl R variants also add position-sensitive rebound zones.
How long does installation take?
Rear shocks are a 20 to 30 minute job per side with hand tools. Front strut-type shocks need a spring compressor and take one to two hours per side.
What is the warranty?
Two-year limited warranty (Bilstein North America). Bilstein warranties are non-transferable and processed through the original place of purchase, so keep your Hannah Suspension order confirmation.
Bilstein truck lines
| Line | Best for | Piston | Reservoir | Adjustable lift | Warranty |
|---|---|---|---|---|---|
| 4600 | Stock height, daily driving and towing | 46mm | No | No | Lifetime |
| 5100 | Leveled or lifted trucks, direct fit | 46mm | No | No | Lifetime |
| 5100 Ride Height Adjustable | Level the front on the factory coil | 46mm | No | 0 to 2.5 in typical | Lifetime |
| 5160 | Lifted trucks, heat and long off-road miles | 46mm | Yes | No | 2 years |
| 6112 | Front coilover upgrade with matched spring | 60mm | No | 0 to 2.75 in typical | Lifetime |
| 8100 | Serious off-road, external adjusters (DSA) | 60mm | Yes | No | 2 years |
| 8112 | Position-sensitive coilover, top of the line | 60mm | Yes | Yes | 2 years |
About Bilstein
Bilstein has built monotube gas-pressure shocks since 1954 and supplies them as original equipment to Ford, GM, Ram and most European makers. Bilstein of America engineers, tests and builds its truck lines in Hamilton, Ohio and Poway, California, and backs the 8100 with a two-year limited warranty. Hannah Suspension ships genuine Bilstein parts with full factory warranty.