4 Shocks, Front and Rear
Two Bilstein 8100 ZoneControl R front shocks and two rears, all 2.65" bodies with remote reservoirs and mounts.Bilstein
8100 Front & Rear Shock Set
2017-2026 Ford F-250 Super Duty 4WD
$2,523.20
Estimated Delivery in 8-12 weeks
Custom Order
All Bilstein 8112 / 8100 are constantly on order, please double check with our Sales team for availability if your needs are time sensitive. Otherwise wait times can be as long as 8-12 weeks.
Bilstein
8100 Front & Rear Shock Set
2017-2026 Ford F-250 Super Duty 4WD
$2,523.20
Estimated Delivery in 8-12 weeks
Found it cheaper? We'll match it.
Got Questions?
Our experts are here to help!
Part Numbers & Details
Built for 2-2.5" of Front Lift
The fronts have extra down travel. Diesel trucks need 2" to 2.5" of front lift; gas trucks 1" to 2.5". Bilstein's spring kit 53-317308 is the guaranteed fit on diesels.No More Top-Out Clunk
ZoneControl R adds a second rebound stage near full extension, so the axle stops hard-landing at the end of travel. No limit straps needed.Fixed or DSA Adjustable
DSA versions add high- and low-speed compression knobs, front and rear.Bilstein Limited 2-Year Warranty
And rebuildable when it's time for service.Specifications
| Bilstein Part Number | Position | Item | Quantity |
|---|---|---|---|
| 25-299304 | Front | 8100 ZoneControl R | 2 |
| 25-344790 | Front | 8100 ZoneControl R DSA | 2 |
| 25-285413 | Rear | 8100 ZoneControl R | 2 |
| 25-344820 | Rear | 8100 ZoneControl R DSA | 2 |
All 2.65" OD, 60mm piston, remote reservoir. Front: 13.58" collapsed / 21.37" extended. Rear: 18.03" collapsed / 30.15" extended.
Product Description
You hit an expansion joint at 70 in a loaded Super Duty. The front axle compresses, rebounds, and keeps going: the heavy axle and big tires drag the front of the truck down again, and you get a second hit the truck wasn't ready for. That's the solid-axle porpoise, and a bigger body alone doesn't fix it. The 8100 ZoneControl R adds a second rebound piston near full extension that catches the axle before it tops out, so the cycle stops after one. Add 60mm pistons and a remote reservoir at each corner, and the truck stays composed loaded, towing, or on rugged trails to the hunt or the campsite.
What the Letters Mean
- 8100 ZoneControl R. 2.65" monotube with a remote reservoir and a second rebound stage near full extension. Fixed valving.
- 8100 ZoneControl R DSA. The same shock with high-speed and low-speed compression knobs, so you can firm it up for a full bed or trailer and back off for the commute.
Choose Your Set
- Run fixed front and rear if: the truck tows and hauls about the same every week and you want to install it and forget it.
- Run DSA front and rear if: you swap between an empty commute and a heavy trailer, or you drive fast on dirt with 35s or 37s.
- Run DSA front, fixed rear if: the front end is where you feel it (big tires, plow mount, bumper and winch) and the rear is fine.
The Real Trade-Offs
- It needs front lift. These aren't for a stock-height truck. Plan on 2-2.5" springs or spacers (1-2.5" on gas trucks).
- Factory wheels won't work up front. Bilstein lists the fronts as not compatible with OE wheel backspacing. Max 4.75" backspacing (8.5" wheel at zero offset); largest tire 37x12.5".
- Reservoir mounting may need drilling. If the frame has no factory hole, Bilstein's kit uses threaded inserts in new holes. The wheel well shroud may need trimming.
- Rear lift is 0-1". Fine for a stock or mildly leveled rear.
Install Notes
- Fits 2017-2026 Ford F-250 Super Duty 4WD, gas and diesel, with 1-2.5" (gas) or 2-2.5" (diesel) of front lift.
- Trucks with the electric steering assist module use a bent reservoir plate on the driver side (included).
- Upper front stem nut: 34 ft-lb; hold the pin with a 6mm Allen. No impact guns.
- Factory DSA settings: high-speed 6 clicks from full firm, low-speed 13.
- Alignment and headlight aim after install.
Who Should Buy These
Super Duty owners on 35s or 37s with a 2-2.5" lift who tow, haul, and drive dirt roads, and are done with the porpoising.
Compatibility List
| Year | Make | Model | Drive |
| 2026 | Ford | F-250 Super Duty | 4WD |
| 2025 | Ford | F-250 Super Duty | 4WD |
| 2024 | Ford | F-250 Super Duty | 4WD |
| 2023 | Ford | F-250 Super Duty | 4WD |
| 2022 | Ford | F-250 Super Duty | 4WD |
| 2021 | Ford | F-250 Super Duty | 4WD |
| 2020 | Ford | F-250 Super Duty | 4WD |
| 2019 | Ford | F-250 Super Duty | 4WD |
| 2018 | Ford | F-250 Super Duty | 4WD |
| 2017 | Ford | F-250 Super Duty | 4WD |
Shock Surplus handles Bilstein's warranty claims; if you encounter a product defect please submit a warranty claim.
View Bilstein Warranty Information
For more information: View the Shock Surplus Warranty Policy.
Shipping Info
Free Shipping on most orders to the lower 48 U.S. states. Truck freight items (over 100 lbs) and custom orders require a separate shipping quote.
- Applies to items like axles, leaf springs, and long-travel kits.
- No international shipping on freight items — only to U.S.-based freight forwarders.
- Worldwide shipping available: Canada, Europe, UAE, Australia, and most of Asia.
Contact us for an international shipping quote.
Returns & Exchanges
30-Day Return Policy — Items must be new, unused, uninstalled, and include all original hardware.
- No restocking fees for exchanges or gift card credit.
- 10% restocking fee on refunds, returns cost us real money, so the 10% helps keep the lights on.
- Installed, damaged, or dirty parts cannot be returned.
- Any returns missing hardware or miscellaneous items, the return will be denied and returned to the buyer at the buyer's expense.
Return Shipping Responsibility
CHECKOUT+ Package and Order Protection plan provides prepaid return labels for any returned packages, this fee varies by product.
- Our mistake (misboxed, wrong item, damaged): We cover the cost of return shipping.
- Buyer mistake (wrong item ordered, fitment error, changed mind): Return shipping is the buyer's responsibility - unless CHECKOUT+ Package Protection has been purchased.
Shipping cost details:
- Under 50 lbs: Discounted carrier rate
- Over 50 lbs: Discounted carrier rate + $25 oversize fee
Refunds
Refunds are issued within 5–7 business days of receiving your return.
- Funds typically post to your account in 1–3 business days depending on your payment method.
- There is a 10% restocking fee on all refunds. We don’t get our original shipping, labor, or transaction fees back — so the 10% restocking fee keeps the lights on.
- You will receive an email once your refund is processed.
International Orders
- All international orders are final sale.
- Returns via freight forwarders only accepted if the product hasn’t left the U.S.
- Import taxes, duties, and other possible import-related fees are the buyer’s responsibility and not included in our shipping charges.
- We are not responsible for goods once exported outside the U.S.
Why Shock Surplus
1,000,000+ Shocks Shipped
The Premier Suspension Specialists
Authorized Dealer
Brand New - Warranty Backed
Free Shipping
Orders Over $175 - Lower 48 States
30-Day Returns
Free Exchange on Qualified Orders
INFORMATION
You hit an expansion joint at 70 in a loaded Super Duty. The front axle compresses, rebounds, and keeps going: the heavy axle and big tires drag the front of the truck down again, and you get a second hit the truck wasn't ready for. That's the solid-axle porpoise, and a bigger body alone doesn't fix it. The 8100 ZoneControl R adds a second rebound piston near full extension that catches the axle before it tops out, so the cycle stops after one. Add 60mm pistons and a remote reservoir at each corner, and the truck stays composed loaded, towing, or on rugged trails to the hunt or the campsite.
What the Letters Mean
- 8100 ZoneControl R. 2.65" monotube with a remote reservoir and a second rebound stage near full extension. Fixed valving.
- 8100 ZoneControl R DSA. The same shock with high-speed and low-speed compression knobs, so you can firm it up for a full bed or trailer and back off for the commute.
Choose Your Set
- Run fixed front and rear if: the truck tows and hauls about the same every week and you want to install it and forget it.
- Run DSA front and rear if: you swap between an empty commute and a heavy trailer, or you drive fast on dirt with 35s or 37s.
- Run DSA front, fixed rear if: the front end is where you feel it (big tires, plow mount, bumper and winch) and the rear is fine.
The Real Trade-Offs
- It needs front lift. These aren't for a stock-height truck. Plan on 2-2.5" springs or spacers (1-2.5" on gas trucks).
- Factory wheels won't work up front. Bilstein lists the fronts as not compatible with OE wheel backspacing. Max 4.75" backspacing (8.5" wheel at zero offset); largest tire 37x12.5".
- Reservoir mounting may need drilling. If the frame has no factory hole, Bilstein's kit uses threaded inserts in new holes. The wheel well shroud may need trimming.
- Rear lift is 0-1". Fine for a stock or mildly leveled rear.
Install Notes
- Fits 2017-2026 Ford F-250 Super Duty 4WD, gas and diesel, with 1-2.5" (gas) or 2-2.5" (diesel) of front lift.
- Trucks with the electric steering assist module use a bent reservoir plate on the driver side (included).
- Upper front stem nut: 34 ft-lb; hold the pin with a 6mm Allen. No impact guns.
- Factory DSA settings: high-speed 6 clicks from full firm, low-speed 13.
- Alignment and headlight aim after install.
Who Should Buy These
Super Duty owners on 35s or 37s with a 2-2.5" lift who tow, haul, and drive dirt roads, and are done with the porpoising.
VIDEO GALLERY
CUSTOMER REVIEWS
Bilstein Upgrade
The Bilsteins were purchased to replace some worn Rough Country N3s. The installation was straightforward with no difficulties. I also replaced the steering stabilizer with the matching one from Bilstein. The overall ride improvement feels solid. It is firm but smooth.
Verified Buyer
Making the Greatest Truck Even Greater
Put these on my 2014 Tundra. Noticeable difference especially at high speed and washboard gravel. For under $1000, can't go wrong
Verified Buyer
Like a new truck.
I didn’t realize how bad my suspension was till I put the Bilsteins on. Had Ranchos and these are sooo much better. Quick shipping. Decent price. Great product.
Verified Buyer
The Expert's Opinion
"Bilstein shocks aren't always the softest ride out there, but if you want precision handling, confidence at high speeds, and rock-solid stability under load, they're the best in the game.
They're built to perform. At Shock Surplus, we back every Bilstein we sell – because we know they won't let you down"
Sean
Shock Surplus Founder
15+ years experience
Custom Build
All Bilstein 8112 / 8100 are constantly on order, please double check with our Sales team for availability if your needs are time sensitive. Otherwise wait times can be as long as 8-12 weeks.
Contact Us
Questions? We've got answers
Bilstein shocks make your vehicle respond much better than stock shocks. Are they super soft and squishy on the road? No. They give you confidence because your truck or SUV reacts exactly how you expect when you steer or brake. That’s why we say 'Confidence through Control.' If you like having more control and a sportier feel while driving, Bilstein is the right choice. But if you want the same or more comfort than the soft factory shocks, we can recommend other options
Bilstein 5100 shocks can’t be adjusted for stiffness or rebound. But on some trucks and SUVs (like the Tacoma, F-150, or Tundra), they can adjust the front ride height. This lets you reuse your stock coil springs and still lift the front of your vehicle by up to 2.5 inches, depending on the model. Always check the product details for the exact fit on your vehicle
Click the 'Select Your Vehicle' button above the 'Add to Cart' button to make sure the shocks fit your exact vehicle. If needed, the site will send you to the right shocks for your ride. If your vehicle has been lifted, use the dropdown menu to pick the correct lift height. For example, if you have a Rough Country 6-inch lift kit, choose Front 4–6" and Rear 3–4" (the rear is usually smaller than the front). Still not sure? Our sales team is happy to help.
Bilstein shocks are one of the most durable and reliable shocks manufactured here in the USA. German engineering mixed with extreme abuse testing has resulted in a shock absorber that is designed to last 100,000 miles or more. We stand behind every Bilstein shock we sell and offer an expedited warranty process for any issues surrounding your purchase from Shock Surplus.
Product Details
Whether you want to upgrade, add a reservoir, or find something more affordable, contact us with any questions!
Part Numbers & Details
View full product specifications
Warranty
View warranty coverage
Shipping & Returns
Free shipping within the lower 48 United States
