9 Best Shocks That Keep Your Tonneau Cover Snug and Secure
A worn or broken gas strut can drop your heavy tonneau cover with nearly 450 pounds of force, enough to crack a window or dent a tailgate. But you don’t have to settle for a sagging, flapping lid that ruins your truck’s profile and convenience. Instead, you can outfit your bed with one of nine precision shocks engineered to hold your cover snug and secure.
| 17 Inch Lift Supports Fits Tonneau Cover Truck Topper Cap Tool Box Snugtop |  | Most Versatile | Extended Length: 17 inches | Compressed Length: 10.25 inches | Operating Force: 80 lbs (178N) | VIEW LATEST PRICE | Read Our Analysis |
| Vepagoo St270edi-45 27 inch 45 lb Gas Struts for Truck Tonneau Cover 2Pcs |  | Heavy-Duty Pick | Extended Length: 27 inches | Compressed Length: 16.17 inches | Operating Force: 45 lbs (200N) | VIEW LATEST PRICE | Read Our Analysis |
| Undercover Gas Spring ST270EDI-45 Replacement Strut 27 inch 45lb |  | OEM Direct Fit | Extended Length: 27 inches | Compressed Length: 15.17 inches | Operating Force: 45 lbs (200N) | VIEW LATEST PRICE | Read Our Analysis |
| AUCLIDIS 27 Inch Gas Struts for Tonneau Cover (2-Pack) |  | Top Rated | Extended Length: 27 inches | Compressed Length: 15.2 inches | Operating Force: 45 lbs (200N) | VIEW LATEST PRICE | Read Our Analysis |
| HUOPO ST270EDI-45 27 inch 45lb Gas Struts for Undercover Parts 2 Pack |  | Customer Favorite | Extended Length: 27 inches | Compressed Length: 15.2 inches | Operating Force: 45 lbs | VIEW LATEST PRICE | Read Our Analysis |
| ARANA ST270edi2-45 27 inch 45LB Gas Struts for Undercover Parts 2Pcs |  | Easiest Install | Extended Length: 26.97 inches | Compressed Length: 15.17 inches | Operating Force: 45 lbs (200N) | VIEW LATEST PRICE | Read Our Analysis |
| ST270EDI2-45 27in 45lb Gas Strut for Boat Hatch Truck Bed Tonneau Cover |  | Best for Boats | Extended Length: 27 inches | Compressed Length: Not specified | Operating Force: 45 lbs (200N) | VIEW LATEST PRICE | Read Our Analysis |
| ARANA Snugtop 713120-1200 29 inch 85 LB Gas Struts for Tonneau Cover 2Pcs |  | High Capacity | Extended Length: 28.98 inches | Compressed Length: 15.99 inches | Operating Force: 85 lbs (378N) | VIEW LATEST PRICE | Read Our Analysis |
| 713119 Tonneau Cover Gas Strut 26″ 80lb (2-Pack) |  | Budget-Friendly Pick | Extended Length: 26.50 inches | Compressed Length: 15.48 inches | Operating Force: 80 lbs (356N) | VIEW LATEST PRICE | Read Our Analysis |
More Details on Our Top Picks
17 Inch Lift Supports Fits Tonneau Cover Truck Topper Cap Tool Box Snugtop
Looking for the most versatile lift support out there? You’ve got it. These 17 inch gas struts fit tonneau covers, truck toppers, tool boxes, and Snugtop brands. They’re universal, so you can swap them into campers, RVs, cabinets, or fiberglass tops. Each strut extends to 17 inches and compresses to 10 1/4 inches, with an 80 pound operating force. Install them without special tools. You get two struts, end sockets, and hardware, all backed by a limited lifetime warranty. Plus, they’re rated 4.5 stars. That’s reliable, durable support for your projects.
- Extended Length:17 inches
- Compressed Length:10.25 inches
- Operating Force:80 lbs (178N)
- Material:Metal
- Quantity in Package:2
- Warranty/Support Period:Limited lifetime warranty
- Additional Feature:Interchangeable part numbers
- Additional Feature:80 pounds operating force
- Additional Feature:Includes end sockets and hardware
Vepagoo St270edi-45 27 inch 45 lb Gas Struts for Truck Tonneau Cover 2Pcs
If you haul heavy gear, the Vepagoo St270edi-45 gas struts are a heavy-duty pick you can count on. With a beefy 45-pound operating force and 27-inch extended length, they’ll hold your heavy tonneau or truck topper firmly open, preventing that nasty accidental slam. Installation takes about five minutes and you only need a flat screwdriver, no extra fuss. They’re built from durable carbon steel and fit multiple interchange numbers, so compatibility shouldn’t be an issue. You also get 18-month protection plus 24-hour email support if you have questions.
- Extended Length:27 inches
- Compressed Length:16.17 inches
- Operating Force:45 lbs (200N)
- Material:Carbon steel
- Quantity in Package:2
- Warranty/Support Period:18-month full order protection
- Additional Feature:Prevents accidental closure
- Additional Feature:24-hour email support
- Additional Feature:Only flat screwdriver needed
Undercover Gas Spring ST270EDI-45 Replacement Strut 27 inch 45lb
The Undercover Gas Spring ST270EDI-45 is an OEM direct fit replacement strut, perfect for anyone needing to restore their tonneau cover’s smooth operation. You’ll get two 27-inch struts, each providing 45 pounds of force, ideal for lids weighing 36 to 50 pounds. Here’s what you need to know:
- Dimensions: Extends to 26.97 inches, compresses to 15.17 inches.
- Build: Durable carbon steel with a 10mm ball socket and 8mm thread.
- Installation: Swap out your old strut in about three minutes using just a screwdriver. No specialized tools required.
- Support: Enjoy an 18-month replacement warranty and a 4.3-star rating from over 800 reviews.
With effortless opening and gentle closing, it’s a quick fix that’ll keep your cover snug and secure.
- Extended Length:27 inches
- Compressed Length:15.17 inches
- Operating Force:45 lbs (200N)
- Material:Carbon steel
- Quantity in Package:2
- Warranty/Support Period:18-month replacement warranty
- Additional Feature:Ball socket hole 10mm
- Additional Feature:Includes four ball studs
- Additional Feature:Three-minute installation time
AUCLIDIS 27 Inch Gas Struts for Tonneau Cover (2-Pack)
AUCLIDIS 27 Inch Gas Struts are a top rated replacement that fits a wide range of tonneau cover shells and truck beds. You’re getting a two pack of these metal struts, each extending to 27 inches and compressing down to 15.2 inches. They’re built with nylon ball sockets and handle a solid 45 pounds of force, so they’ll lift and hold your cover without a struggle. But before you buy, match your OEM numbers like st270edi2-45 or IH1214GS. It’s a quick check that saves hassle!
What’s in the box:
- Two gas struts
- Installation guide
Why you’ll like them:
- 12 month replacement guarantee
- Customer service that responds
- 4.5 star average satisfaction
Don’t forget: you’ve got a 30 day return window, too. Just make sure to sign in if you need warranty support.
- Extended Length:27 inches
- Compressed Length:15.2 inches
- Operating Force:45 lbs (200N)
- Material:Metal
- Quantity in Package:2
- Warranty/Support Period:12-month replacement guarantee
- Additional Feature:Nylon ball socket connection
- Additional Feature:12-month replacement guarantee
- Additional Feature:Competitive price feedback option
HUOPO ST270EDI-45 27 inch 45lb Gas Struts for Undercover Parts 2 Pack
These HUOPO ST270EDI-45 gas struts are a customer favorite for anyone needing a quick, reliable tonneau cover replacement. You’ll love the straightforward setup: grab a flat screwdriver, and you’re done in about three minutes. Each strut delivers a firm 45 pounds of lift, strong enough that compressing them by hand takes real effort, which means your cover stays put. They measure 27 inches extended and 15.2 inches compressed, pairing with a 10 mm ball stud for a snug fit. Check interchange numbers like 190725 or ML2645 to match your OEM parts. Plus, HUOPO backs them with 13 months of replacement service, so you’re covered.
- Extended Length:27 inches
- Compressed Length:15.2 inches
- Operating Force:45 lbs
- Material:Carbon steel
- Quantity in Package:2
- Warranty/Support Period:13-month replacement service
- Additional Feature:13-month replacement service
- Additional Feature:Significant force to compress
- Additional Feature:10mm nylon socket connector
ARANA ST270edi2-45 27 inch 45LB Gas Struts for Undercover Parts 2Pcs
If your tonneau cover sags or slams shut, you need the ARANA ST270edi2-45, and it’s the easiest install you’ll find. You’ll only need a flat screwdriver and about five minutes per pair. That’s faster than making your morning coffee.
Each 27-inch strut delivers 45 pounds of force, lifting your cover smoothly and holding it securely. They’re built from durable carbon steel and come with four ball studs and a guide. Compatible with multiple OEM numbers like SL2645 and ST270EDI45, these black struts mount on the rear. ARANA backs them with 365-day support, so you’re covered if anything goes wrong.
- Extended Length:26.97 inches
- Compressed Length:15.17 inches
- Operating Force:45 lbs (200N)
- Material:Carbon steel
- Quantity in Package:2
- Warranty/Support Period:365-day support
- Additional Feature:365-day support period
- Additional Feature:Faster than making coffee
- Additional Feature:Includes four ball studs
ST270EDI2-45 27in 45lb Gas Strut for Boat Hatch Truck Bed Tonneau Cover
The ST270EDI2-45 gas strut excels on boats, but it’s just as capable on your truck bed tonneau cover. You get two 27-inch struts with a 45-pound lift each, so you’ll free up your hands the moment you release the latch. Installation takes only a flathead screwdriver, and you’ll want to measure the extension length against your original part first.
Check your OE numbers, like ML2645 or SL26-45, for a direct match. Each unit weighs a featherlight 4.8 ounces yet handles 200 N of force. Euplokeer backs you with 24-hour email support and a 15-month exchange policy. That’s solid peace of mind for a snug, secure fit.
- Extended Length:27 inches
- Compressed Length:Not specified
- Operating Force:45 lbs (200N)
- Material:Durable metal
- Quantity in Package:2
- Warranty/Support Period:15-month product exchange policy
- Additional Feature:Suitable for food truck windows
- Additional Feature:15-month product exchange
- Additional Feature:10mm ball mount required
ARANA Snugtop 713120-1200 29 inch 85 LB Gas Struts for Tonneau Cover 2Pcs
Looking for a heavy-duty replacement that handles lids tipping the scales at 85 pounds without breaking a sweat, the ARANA Snugtop 713120-1200 delivers that high capacity in spades, making it the top pick for owners of Snugtop Snuglid covers with side lengths of 43 inches or more. You get two carbon steel struts, each packing 378N of force, so your lid opens smoothly and stays put. Expect an extended length of about 29 inches and a compressed length of 16 inches. Just measure your old struts center to center before swapping. ARANA matches OEM specs exactly, and you have a 30 day guarantee. Plus, customer support helps with installation steps if you need them.
- Extended Length:28.98 inches
- Compressed Length:15.99 inches
- Operating Force:85 lbs (378N)
- Material:Carbon steel
- Quantity in Package:2
- Warranty/Support Period:365-day support
- Additional Feature:13mm metal ball ends
- Additional Feature:For lids 68-94 lbs
- Additional Feature:Side length ≥ 43 inches
713119 Tonneau Cover Gas Strut 26″ 80lb (2-Pack)
For many truck owners, a flapping tonneau cover at highway speeds is both annoying and a safety hazard. You’ll stop that chaos with the 713119 gas strut, a 26-inch, 80-pound workhorse that lifts lids weighing 64 to 88 pounds. Installation takes about three minutes thanks to the snap-on ball studs, and you get two struts plus all mounting hardware in the box.
- Exact fit: Check your OEM interchange number (like C1624797) before buying.
- Versatile use: Great for boat engine covers, RV bunk doors, or basement trap doors.
- Support: You’ve got 18 months of replacement backing, plus a 30-day Amazon return window.
With a 4.3-star rating from 348 buyers, most folks find these struts smooth and reliable. Just verify your compatibility first, and you’ll keep that cover locked down tight.
- Extended Length:26.50 inches
- Compressed Length:15.48 inches
- Operating Force:80 lbs (356N)
- Material:Not specified
- Quantity in Package:2
- Warranty/Support Period:18-month replacement support
- Additional Feature:For lids 64-88 lbs
- Additional Feature:Connector hole 10mm
- Additional Feature:Installation videos available online
Factors to Consider When Choosing Shocks for Tonneau Cover
You’ll need to nail the length versus compressed size, or your cover won’t open fully or close flat. Your force rating must match your cover’s weight, and double check the mounting hardware type and application compatibility before you buy. Also, don’t forget about installation tool requirements, because some setups demand extra effort without the right gear.
Length vs. Compressed Size
Since length and compressed size are two sides of the same coin, you need to get both right for your tonneau cover to work without a hitch. A longer gas strut gives you more lift support, but it gobbles up clearance space when fully extended. On the flip side, the compressed size dictates how compact the shock gets when not in use, which directly influences where you can install it. Small mismatches here create real headaches. Slight variations in either dimension can mess with the force exerted, making your cover hard to lift or prone to slamming shut. You want a balanced length to compressed size ratio. That sweet spot keeps your cover stable and smooth through its full range of motion, no strain or stalling. Measure twice, pick once.
Force Rating Match
Getting the force rating right is the make-or-break move for your tonneau cover shocks. Match it to your cover’s weight, plain and simple. Too low, and you’ll wrestle with a stubborn lid that won’t lift. Too high, and you’re fighting to close it, risking hinge stress and premature wear. Manufacturers stamp that number, say 45 lb or 80 lb, for a reason. That’s your target, not a suggestion. You want a shock that lifts smoothly without you heaving, yet lets the cover settle gently when you lower it. A mismatched rating throws off the whole balance, making every open and close a gamble. Stick to the spec, and you’ll get years of dependable, effortless operation. It’s that direct.
Mounting Hardware Type
Two key things dictate how smoothly those new shocks go on: the mounting hardware type and your cover’s specific fit. First, figure out what you’re working with. You’ll likely see ball sockets, end brackets, or threaded mounts. Each serves a different purpose, so don’t guess. For instance, a 10mm ball socket needs a matching receiver, while 8mm threads require a compatible bracket. Get this wrong, and you’ll fight a loose connection or a stripped part.
Some shocks ship with hardware integrated; others force you to buy brackets separately. That’s a pain if you’re not prepared. Measure your existing setup before ordering. Proper hardware prevents leaks and keeps that shock performing over years, not weeks. Pick the right size, and you’re set. Pick wrong, and you’re stuck with a floppy cover. That’s not snug, that’s a headache.
Application Compatibility
Once you’ve squared away the mounting hardware, it’s time to make certain those shocks actually fit your specific setup. Start by verifying the shock’s extended and compressed lengths match your tonneau cover’s dimensions. Then, check the operating force, measured in pounds or Newtons, to ensure it supports your lid’s weight without struggling or bouncing.
You’ll also want to confirm OEM or interchange numbers for a perfect brand-specific match. Don’t overlook ball socket and thread sizes, because mismatched hardware means nothing works. Finally, verify the maximum lid weight capacity the shock can handle, ensuring safe, effective operation. Get these factors right, and you’ll avoid that frustrating “close, but not quite” fit that plagues many installations.
Installation Tool Requirements
Before you start, take a quick inventory of your toolbox, because while most gas struts swap out with nothing more than a flat screwdriver, a few setups demand a socket wrench or a set of allen keys, particularly if you’re dealing with custom mounting brackets or threaded ball studs. You’ll typically remove the old shock and snap the new one into place using its ball socket fittings, a job that standard hand tools handle just fine. But don’t skip the fine print. Check the product listing for tool specifics. Some shocks ship with all necessary hardware, making your swap a five-minute breeze. Others? You’ll need to bring your own wrench. Always verify the kit includes instructions for common tools. That way, you avoid a frustrating mid-project trip to the hardware store. A straightforward installation keeps your cover snug without the headache!
Warranty Length Terms
When you’re investing in new gas struts for your tonneau cover, a longer warranty period signals that the manufacturer’s got your back—and genuine faith in their product. You’ll typically see coverage ranging from 12 months up to 18 months or more, which directly reflects how long they expect the shocks to hold up. Go for at least one year; that’s your baseline for peace of mind during the initial wear-in phase. Shorter stints, like 30 days, scream “buyer beware” and leave you holding the bag if a seal fails early. So, read the fine print carefully—you want replacement coverage for defects or manufacturing flaws, not just a promise. A solid warranty means you can mount those shocks, close your bed, and sleep easy knowing the manufacturer stands behind every inch of that support.
Interchange Number Verification
Ever had a new shock turn out to be the wrong fit? You can dodge that headache by verifying the interchange number stamped on your current unit. First, cross-reference that code against the OEM or manufacturer part number; if they don’t match, don’t force it. Then, grab a tape measure and check the extended and compressed lengths—those dimensions need to align with the replacement’s specs, or you’ll fight with the cover every time. Also, confirm the operating force matches (think pounds of pressure); a mismatched rating means sagging or slamming. Finally, use interchange numbers listed by reputable retailers, since they’re vetted for your exact tonneau model. Take five minutes to verify, and you’ll skip the return trip. That’s the difference between a snug fit and a stubborn one.
