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Seats Base Adapters & Covers

We offer a wide range of premium semi-truck seating options from industry leaders like Bostrom, Seats Inc., and Knoedler. Elevate your driving experience with our luxurious choices, including air ride, legacy, and aftermarket truck seats, all designed for maximum comfort during long hauls. Whether you drive a Peterbilt, Kenworth, Freightliner, or any major make, we have a variety of seats to choose from.
  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • Seats Inc. Legacy Silver Seat W/ High Back, STD Base, Armrests, Bellows - DuraLeather Black / Burgundy

    Seats Inc. Legacy Silver Seat W/ High Back, STD Base, Armrests, Bellows - DuraLeather Black / Burgundy

    SEATS INC

    $1,429.99
    Black / Burgundy DuraLeather High Back Suspension Truck Seat W/ Fully Reclining Backrest* High Quality Legacy Silver Seat* Legacy Silver* High Back* Standard Base* Black-Burgundy 2 Tone Duraleather *...
    188121MWB1164
    SKU:
    188121MWB1164
    Truck Class:
    Heavy Duty
    Color:
    Red
    Style Options:
    High Back
    Material Options:
    DuraLeather
    Make:
    Universal Items
    Type Options:
    Standard Base
    Product Type:
    Seats
    Ready To Ship:
    Yes
    $1,429.99
    Qty in Cart: 0
    Price:
    $1,429.99
    Subtotal:
  • Seats Inc Legacy LO Brown Dura-Leather Mid Back Low Base Truck Seat With EZ Adjust Armrests

    Seats Inc Legacy LO Brown Dura-Leather Mid Back Low Base Truck Seat With EZ Adjust Armrests

    SEATS INC

    $1,534.99
    Brown DuraLeather Low Profile Suspension Truck Seat W/ Fully Reclining Backrest* High Quality Air Ride Seat* Brown Dura-Leather * Skirt Style Suspension Cover * Standard Features * 18 Inch EZ Adjust...
    188598MW63
    SKU:
    188598MW63
    Color:
    Brown
    Truck Class:
    Heavy Duty
    Style Options:
    Mid Back
    Material Options:
    DuraLeather
    Make:
    Universal Items
    Type Options:
    Low Base
    Product Type:
    Seats
    $1,534.99
    Qty in Cart: 0
    Price:
    $1,534.99
    Subtotal:
  • Knoedler Semi-Truck Seat - Low Rider Low Base Mid-Back w/ Air Suspension - Black Synthetic Leather

    Knoedler Semi-Truck Seat - Low Rider Low Base Mid-Back w/ Air Suspension - Black Synthetic Leather

    KNOEDLER

    $1,792.99
    Knoedler Black Synthetic Leather Low Rider Midback Suspension SeatThe Knoedler Low Rider Low Base Mid-Back Seat with Air Suspension is a top-notch ergonomic seat crafted with durable black synthetic...
    800166000
    SKU:
    800166000
    Color:
    Black
    Truck Class:
    Heavy Duty
    Style Options:
    Mid Back
    Material Options:
    Synthetic Leather
    Make:
    Universal Items
    Type Options:
    Low Base
    Product Type:
    Seats
    $1,792.99
    Qty in Cart: 0
    Price:
    $1,792.99
    Subtotal:
  • FREE SHIPPING
    10 Inch Billet Alum. Seat Base Adapter For Seats Inc Legacy Gold & Silver Seats

    10 Inch Billet Alum. Seat Base Adapter For Seats Inc Legacy Gold & Silver Seats

    IOWA CUSTOMS

    $284.99 - $608.99
    Maximize your cab with the 10-Inch Billet Aluminum Seat Base Adapter, a premium solution for upgrading to aftermarket seats, specifically designed for Seats Inc. Legacy Gold and Silver Series...
    PPR_201573
    SKU:
    PPR_201573
    Truck Class:
    Heavy Duty
    Material Options:
    Billet Aluminum
    Make:
    Universal Items
    Make:
    Kenworth
    Make:
    Peterbilt
    Product Type:
    Seats
    Ready To Ship:
    Yes
    $284.99 - $608.99
    Qty in Cart: 0
    Price:
    $284.99 - $608.99
    Subtotal:
  • Limited Quantity Available
    National Captain Series High Back Mordura Cloth Air Seat With Standard Base

    National Captain Series High Back Mordura Cloth Air Seat With Standard Base

    NATIONAL SEATING

    $665.99 - $829.99
    For drivers seeking a premium seating upgrade, the National Captain Series High Back Mordura Cloth Air Seat with Standard Base offers supportive air?suspension comfort. This high?back seat features...
    PPR_201601
    SKU:
    PPR_201601
    Truck Class:
    Heavy Duty
    Style Options:
    High Back
    Material Options:
    Cloth
    Make:
    Universal Items
    Type Options:
    Standard Base
    Product Type:
    Seats
    Ready To Ship:
    Yes
    $665.99 - $829.99
    Qty in Cart: 0
    Price:
    $665.99 - $829.99
    Subtotal:
  • National Semi-Truck Seat - Captain Lo Low Base High Back Air Suspension - Opal Gray Vinyl

    National Semi-Truck Seat - Captain Lo Low Base High Back Air Suspension - Opal Gray Vinyl

    NATIONAL SEATING

    $734.99
    Captain Lo LoPro 97 Ais Suspension Seat Without ArmrestsThe Captain Lo Air Seat with a high back and low base offers ergonomic comfort and low ownership costs. With its opal gray vinyl construction,...
    71124001
    SKU:
    71124001
    Truck Class:
    Heavy Duty
    Style Options:
    High Back
    Material Options:
    Vinyl
    Make:
    Universal Items
    Type Options:
    Standard Base
    Product Type:
    Seats
    $734.99
    Qty in Cart: 0
    Price:
    $734.99
    Subtotal:
  • Bostrom Wide Ride II Plus Serta Standard Base Mid-Back Seat With Armrests - Ultra-Leather

    Bostrom Wide Ride II Plus Serta Standard Base Mid-Back Seat With Armrests - Ultra-Leather

    BOSTROM TRUCK SEATS

    $1,412.99 - $1,541.99
    Elevate your driving experience with the Bostrom Wide Ride II Plus Serta Standard Base Mid-Back Seat featuring dual armrests. Crafted with Ultra-Leather, it features Serta's Cool Action Gel-infused...
    PPR_201564
    SKU:
    PPR_201564
    Truck Class:
    Heavy Duty
    Style Options:
    Mid Back
    Material Options:
    Ultra Leather
    Make:
    Universal Items
    Type Options:
    Standard Base
    Product Type:
    Seats
    Ready To Ship:
    Yes
    $1,412.99 - $1,541.99
    Qty in Cart: 0
    Price:
    $1,412.99 - $1,541.99
    Subtotal:
  • FREE SHIPPING
    12 Inch Billet Alum. Seat Base Adapter For Seats Inc Legacy LO Seats For Kenworth W900A, W900B, W900L

    12 Inch Billet Alum. Seat Base Adapter For Seats Inc Legacy LO Seats For Kenworth W900A, W900B, W900L

    IOWA CUSTOMS

    $287.99 - $596.99
    Installation can be simplified with the right adapter, this 12-inch billet aluminum seat base adapter is designed to mount Seats Inc. Legacy LO seats in compatible Kenworth W900-series trucks. This...
    PPR_201584
    SKU:
    PPR_201584
    Truck Class:
    Heavy Duty
    Material Options:
    Billet Aluminum
    Make:
    Kenworth
    Product Type:
    Seats
    $287.99 - $596.99
    Qty in Cart: 0
    Price:
    $287.99 - $596.99
    Subtotal:
  • Vendetta Billet Aluminum Seat Base Adapter For Peterbilt 378, 379, 386, 389, 589

    Vendetta Billet Aluminum Seat Base Adapter For Peterbilt 378, 379, 386, 389, 589

    VENDETTA

    $289.99
    Peterbilt Billet Seat Base Adapter - Gives Up To 7 Inches Of Leg RoomAdd up to 7 inches of legroom to enhance your driving comfort with the Vendetta Billet Seat Base Adapter. This sleek and...
    01-1920001
    SKU:
    01-1920001
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Seats
    Ready To Ship:
    Yes
    Material Options:
    Billet Aluminum
    $289.99
    Qty in Cart: 0
    Price:
    $289.99
    Subtotal:
  • Bostrom Pro Ride Mid Back Seat, W/ Armrests - Ultra Leather Black / Gray

    Bostrom Pro Ride Mid Back Seat, W/ Armrests - Ultra Leather Black / Gray

    BOSTROM TRUCK SEATS

    $1,187.99
    Black & Gray Ultra Leather Mid Back Pro Ride Seat W/ Dual Arm Rests* High Quality Seat* Made Of Ultra-leather* Black/Gray* Mid Back* Dual Arm Rest* Air Lumbar* Drape Suspension Cover* Standard...
    9230011L77
    SKU:
    9230011L77
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Style Options:
    Mid Back
    Material Options:
    Ultra Leather
    Make:
    Universal Items
    Product Type:
    Seats
    $1,187.99
    Qty in Cart: 0
    Price:
    $1,187.99
    Subtotal:
  • Bostrom Semi-Truck Seat - Mid-Back W/ Black Ultra Leather & Without Arm Rest

    Bostrom Semi-Truck Seat - Mid-Back W/ Black Ultra Leather & Without Arm Rest

    BOSTROM TRUCK SEATS

    $1,095.99
    Black Ultra Leather Mid Back Seat Without Arm RestThe Lo Pro Midback Black Ultra Leather seat is a great choice for professional drivers. Its ergonomic cushions and Flex Support System offer optimal...
    9230010900
    SKU:
    9230010900
    Truck Class:
    Heavy Duty
    Color:
    Black
    Material Options:
    Ultra Leather
    Make:
    Universal Items
    Style Options:
    Mid Back
    Type Options:
    Low Base
    Product Type:
    Seats
    Ready To Ship:
    Yes
    $1,095.99
    Qty in Cart: 0
    Price:
    $1,095.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Bostrom And National Seat Adapter Kit For Peterbilt & Kenworth

    Bostrom And National Seat Adapter Kit For Peterbilt & Kenworth

    BOSTROM TRUCK SEATS

    $103.99
    Seat Adapter Kit Fits Peterbilt & KenworthAre you installing a new seat in your truck? 4 State Trucks offers this quality retrofit seat adapter kit for use with Bostrom and National Seats to fit many...
    6205011001
    SKU:
    6205011001
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Make:
    Peterbilt
    Product Type:
    Seats
    Position:
    Kit Full
    Location:
    Made In USA
    $103.99
    Qty in Cart: 0
    Price:
    $103.99
    Subtotal:
  • Sears Seating Sentry High Back Truck Seat With Armrests

    Sears Seating Sentry High Back Truck Seat With Armrests

    SEARS SEATING

    $867.99
    Refresh your driving experience with the Sears Seating Sentry High Back Truck Seat with Armrests. This seat is designed to provide superior comfort and support for long-haul journeys, featuring a 20...
    PPR_201619
    SKU:
    PPR_201619
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Material Options:
    Cloth
    Style Options:
    High Back
    Make:
    Universal Items
    Product Type:
    Seats
    Ready To Ship:
    Yes
    $867.99
    Qty in Cart: 0
    Price:
    $867.99
    Subtotal:
  • Bostrom T910 Low Base Seat Suspension Assembly

    Bostrom T910 Low Base Seat Suspension Assembly

    BOSTROM TRUCK SEATS

    $673.99
    Low Base Suspension Assembly For Bostrom T910 SeatsDo you need to replace the base to a Bostrom T910 Low Base seat? 4 State Trucks offers this high quality low base suspension assembly to renew the...
    2321214001
    SKU:
    2321214001
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Type Options:
    Low Base
    Product Type:
    Seats
    $673.99
    Qty in Cart: 0
    Price:
    $673.99
    Subtotal:
  • National Ensign Standard Base Mid-Back Air Seat With Armrests

    National Ensign Standard Base Mid-Back Air Seat With Armrests

    NATIONAL SEATING

    $624.99 - $677.99
    When you want a balance of comfort and support for long drives, the National Ensign Standard Base Mid Back Air Seat with Armrests is a superior replacement option. This air?suspended seat features a...
    PPR_201606
    SKU:
    PPR_201606
    Truck Class:
    Heavy Duty
    Style Options:
    Mid Back
    Material Options:
    Cloth
    Make:
    Universal Items
    Type Options:
    Standard Base
    Product Type:
    Seats
    Ready To Ship:
    Yes
    $624.99 - $677.99
    Qty in Cart: 0
    Price:
    $624.99 - $677.99
    Subtotal:
  • Vendetta Black PC Billet Seat Base Adapter For Peterbilt 378, 379, 386, 389, 589

    Vendetta Black PC Billet Seat Base Adapter For Peterbilt 378, 379, 386, 389, 589

    VENDETTA

    $361.99
    Peterbilt Seat Base Adapter - Gives Up To 7 Inches Of Leg RoomCustomize your driving position with the Vendetta Billet Seat Base Adapter, which provides up to 7 inches of adjustable legroom in 1-inch...
    01-1920003
    SKU:
    01-1920003
    Finish Options:
    Black Powder Coat
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Make:
    Peterbilt
    Product Type:
    Seats
    Ready To Ship:
    Yes
    $361.99
    Qty in Cart: 0
    Price:
    $361.99
    Subtotal:
  • Bostrom Pro Ride Low Base Mid-Back Seat - Black/Tan UltraLeather

    Bostrom Pro Ride Low Base Mid-Back Seat - Black/Tan UltraLeather

    BOSTROM TRUCK SEATS

    $1,250.99
    Bostrom Pro Ride Black & Tan UltraLeather Low Base Mid-Back Seat* High Quality Seat* Pro Ride * Black And Tan * Ultra-Leather * Mid Back * Low Base * With Armrest* Made In USA* Sold Individually **...
    9230011L82
    SKU:
    9230011L82
    Truck Class:
    Heavy Duty
    Style Options:
    Mid Back
    Material Options:
    Ultra Leather
    Type Options:
    Low Base
    Product Type:
    Seats
    $1,250.99
    Qty in Cart: 0
    Price:
    $1,250.99
    Subtotal:
  • 12 Inch Billet Alum. Seat Base Adapter For Sears Atlas Seats For Kenworth W900A, W900B, W900L

    12 Inch Billet Alum. Seat Base Adapter For Sears Atlas Seats For Kenworth W900A, W900B, W900L

    IOWA CUSTOMS

    $327.99 - $596.99
    Designed to simplify seat installs, this 12-inch billet aluminum seat base adapter helps mount Sears Atlas seats in compatible Kenworth W900-series trucks. This adapter converts the factory floor...
    PPR_201581
    SKU:
    PPR_201581
    Truck Class:
    Heavy Duty
    Material Options:
    Billet Aluminum
    Make:
    Kenworth
    Product Type:
    Seats
    Ready To Ship:
    Yes
    $327.99 - $596.99
    Qty in Cart: 0
    Price:
    $327.99 - $596.99
    Subtotal:
  • Bostrom HiPro-T915 Seat - Mordura Cloth - W/O Swivel, Or Suspension Cover - Includes Standard Dampers And Manual Lumbar

    Bostrom HiPro-T915 Seat - Mordura Cloth - W/O Swivel, Or Suspension Cover - Includes Standard Dampers And Manual Lumbar

    BOSTROM TRUCK SEATS

    $990.99 - $1,345.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrucksBostrom T915 Standard Base High Back Seat - Black Mordura ClothBlack Mordura Cloth Standard Base High...
    PPR_299990
    SKU:
    PPR_299990
    Material Options:
    Cloth
    Color:
    Red
    Color:
    Black
    Truck Class:
    Heavy Duty
    Type Options:
    Standard Base
    Style Options:
    High Back
    Make:
    Universal Items
    Product Type:
    Seats
    Style Options:
    Standard Base
    Type Options:
    High Back
    $990.99 - $1,345.99
    Qty in Cart: 0
    Price:
    $990.99 - $1,345.99
    Subtotal:
  • Seats Inc. Legacy Silver Seat W/ High Back, STD Base, Armrests, Bellows - DuraLeather Black / Blue

    Seats Inc. Legacy Silver Seat W/ High Back, STD Base, Armrests, Bellows - DuraLeather Black / Blue

    SEATS INC

    $1,311.99
    Black / Blue DuraLeather High Back Suspension Truck Seat W/ Fully Reclining Backrest* High Quality Legacy Silver Seat* High Back* Standard Base* Black-Blue 2 Tone Duraleather With Armrests And...
    188121MWB1162
    SKU:
    188121MWB1162
    Truck Class:
    Heavy Duty
    Style Options:
    High Back
    Material Options:
    DuraLeather
    Make:
    Universal Items
    Type Options:
    Standard Base
    Product Type:
    Seats
    $1,311.99
    Qty in Cart: 0
    Price:
    $1,311.99
    Subtotal:
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Adding your products to cart

Here's the truth: investing those hard-earned dollars into aftermarket seating can fundamentally transform your driving experience. You can reduce your fatigue and get better lumbar support. That’s why we offer some of the best semi truck seats and accessories in the industry—built for comfort, durability, and long-haul performance. Whether you drive a Peterbilt, Kenworth, Freightliner, or another rig, you’ll find options that match your truck’s specs and your personal style.

Luxury Big Rig Seating Options

From air ride seats to universal semi truck seats and custom seat bases, we’ve got your backside covered. Choose your style and setup: - High-back, mid-back, and low-profile seats for every body type and cab layout. - Air ride seats for long-haul comfort, smoother suspension, and adjustable positioning. - Heated and cooled seat options to beat the heat or fight off the chill on extreme routes. - Ergonomic designs to ease back discomfort and promote better posture.

The Top Features

Material Matters Pick from cloth, faux leather, or genuine leather depending on your budget and the kind of road life you live. All built to handle real miles—not showroom fluff. Stylish & Functional Covers Dress up your seat with sleek two-tone seat covers, stitched accents, and built-in back pockets for on-the-go storage. Custom Base Adapters Mount your seat the right way with base adapters built for Seats Inc. Legacy, Sears Atlas, Bostrom, and more. Available in billet aluminum, gloss black, chrome, and custom powder-coat finishes.

Comfortable Accessories

Small upgrades with big difference: - Armrest covers for all-day elbow comfort - Lumbar support cushions to save your spine - Seat organizers to keep your essentials right where you need them

Get the Perfect Commercial Truck Seat

Check out our complete aftermarket semi truck seating guide to learn how to choose the right seat for your setup. Almost every new seat is going to need an adapter, unless it's a standard base unit. Let's say you have a mid-range truck, like a Freightliner M2 model; typically, those don't have a flat floor but a bit of a hump in the middle. That means you'll need a specific adapter and commercial truck seat that has a low-profile midback so you don't hit the roof. Lucky for you, our product selection is vast!

Why Shop Our Semi Truck Seating?

- Wide compatibility with Peterbilt, Freightliner, Kenworth, Volvo, and more. - Universal fitment options for hard-to-match setups. - Direct replacement or upgrade-ready seats and hardware. - Everyday low prices without sacrificing quality. - Real support from truck parts experts who understand your cab setup.

Start Driving in Comfort

A high-quality seat isn’t a luxury—it’s a necessity. Upgrade your semi truck seat, mount it with confidence, and finish it off with stylish covers and accessories that last. Shop the best semi truck seats and seating accessories today—and take the pressure off your back for the long haul.

Frequently Asked Questions About Semi-Truck Seats, Base Adapters & Covers

Will these seats fit my specific truck model and year?

Most aftermarket semi-truck seats are designed with universal mounting patterns that fit standard truck bases from manufacturers like Peterbilt, Kenworth, Freightliner, Volvo, and Mack. However, some trucks require specific base adapters. Check your current seat's bolt pattern (typically measured center-to-center) and compare it to the seat specifications. Common patterns include 8" x 8" and 11" x 11". If you're unsure, measure your existing seat base or contact us with your truck's year, make, and model for verification.

How difficult is it to install a new seat or base adapter?

Installation typically takes 30-60 minutes per seat with basic hand tools. You'll need a socket set, wrenches, and possibly a drill for certain adapters. The process involves unbolting the old seat, potentially installing a base adapter if needed, and bolting in the new seat. Most seats come with installation instructions. Common challenges include accessing tight bolts and ensuring proper electrical connections for air-ride seats. Professional installation is recommended if you're uncomfortable working with air lines or electrical connections.

What's the difference between vinyl, cloth, and leather seat materials?

Vinyl seats are the most durable and easiest to clean, making them ideal for drivers who eat in their trucks or haul dirty loads. They resist stains and spills but can get hot in summer and cold in winter. Cloth seats breathe better and provide more comfort in extreme temperatures but require more maintenance and are harder to clean. Leather offers premium comfort and appearance but needs regular conditioning and costs more. Consider your climate, maintenance preferences, and how many hours you spend in the seat daily when choosing.

Do I need a suspension base or air-ride system for my seat?

If you drive more than 6 hours daily or frequently travel rough roads, a suspension or air-ride seat significantly reduces fatigue and back pain. Air-ride seats offer the best vibration dampening and adjustability but require an air supply connection. Mechanical suspension seats provide good comfort without needing air hookups. Static (non-suspension) seats work for local drivers or backup seats but aren't recommended for long-haul use. Consider your driving conditions and health needs when deciding.

Will aftermarket seat covers fit my existing seats properly?

Universal seat covers work for most standard semi-truck seats but may require some adjustment for a snug fit. Look for covers with elastic bands, drawstrings, or hook-and-loop fasteners for better fitment. Measure your seat's backrest height, width, and cushion dimensions before ordering. Custom-fit covers are available for popular seat models like Bostrom, National, and Sears seating. Avoid covers that interfere with seat adjustment controls or armrest movement. For air-ride seats, ensure covers don't block ventilation ports.


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