Seats and Hardware

Build Your Dream Custom Seat with Professional-Grade Mounting Hardware

Transform your bobber or chopper build with TC Bros' precision-engineered Weld On Solo Seat Spring Mounts. These CNC-machined mounts deliver the rock-solid foundation your custom seat deserves, combining old-school craftsmanship with modern manufacturing precision.

Why Riders Choose These Mounts

Imagine the satisfaction of a perfectly mounted solo seat that moves with you on every ride—no rattles, no flex, just smooth suspension action from your torsion springs. These aren't stamped sheet metal brackets that'll fail after a season. They're machined from solid 1018 cold rolled steel, built to handle years of hard riding.

Key Features

• CNC Machined Precision: Crafted from 1018 cold rolled steel for superior strength and durability
• Universal Fit Design: 1 1/8" radius cope fits both 1" and 1 1/4" cross tubes seamlessly
• Stainless Hardware: 5/16"-18 stainless steel studs resist corrosion and maintain clamping force
• Torsion Spring Compatible: Engineered specifically for torsion-style seat springs
• Weld-Ready Finish: Clean steel surface ready for your torch—no prep work needed
• Complete Kit: Includes 2 mounts, 2 stainless washers, 2 studs, and 2 nylock nuts

Technical Specifications

• Material: 1018 Cold Rolled Steel
• Stud Thread: 5/16"-18
• Base Diameter: 1"
• Cope Radius: 1 1/8"
• Tube Compatibility: 1" and 1 1/4" cross tubes
• Finish: Raw steel (weld-ready)
• Country of Origin: USA

What's in the Box

• 2 × CNC Machined Steel Mounts
• 2 × Stainless Steel Studs
• 2 × Stainless Steel Washers
• 2 × Nylock Nuts

Note: Seat springs sold separately

Installation Made Simple

The pre-coped radius means these mounts sit flush against your frame tube right out of the box. Position them where you want your seat, tack them in place, check your alignment, then lay down a solid bead. The universal design gives you complete freedom to position your seat exactly where it feels right for your build.

Built by Builders, for Builders

TC Bros understands what custom motorcycle fabricators need because they're fabricators themselves. These mounts represent the same quality and attention to detail you'll find throughout their entire line of chopper and bobber components.

Ready to mount your custom seat the right way? Add these professional-grade spring mounts to your cart and take the next step in your build.

TC Bros King & Queen Seat - Premium Sportster Hardtail Chopper Seat

Add timeless style and comfort to your hardtail chopper with this handcrafted King & Queen seat. Built with American quality and designed specifically for TC Bros Sportster hardtail conversions, this seat delivers classic chopper aesthetics with modern durability.

Fitment

• Application: Harley-Davidson Sportster 1982-2003 (hardtail conversions)
• Compatibility: Designed for TC Bros Sportster hardtail kits with matching mounting kit, fender, and sissy bar
• Universal mounting: Six 5/16-18 threaded mounts fit many other hardtail frames
• Weight: 10 lbs

Key Features

• Handmade in USA - American craftsmanship and quality control
• 100% Marine-grade vinyl upholstery - Looks like leather without the maintenance, resists weather and UV damage
• Hand-stitched construction - Premium detailing for lasting durability
• Heavy 14GA powder-coated steel seat pan - Robust foundation that won't flex or crack
• Six 5/16-18 threaded mounting points - Secure installation with universal compatibility
• Choice of patterns - Available in diamond or pleated stitching
• Classic King & Queen profile - Iconic chopper styling with passenger comfort

Pattern Options

Choose from two classic stitching patterns to match your build aesthetic:

• Diamond pattern - Traditional diamond-stitched design for vintage appeal
• Pleated pattern - Clean, linear pleats for a streamlined look

Why Choose Marine-Grade Vinyl?

Marine-grade vinyl delivers the rich look of leather with superior weather resistance and virtually no maintenance. It won't crack, fade, or require conditioning like leather, making it the perfect choice for choppers that see real road miles.

Complete Mounting System

This seat is engineered to work perfectly with TC Bros Sportster hardtail components (sold separately):

• TC Bros Sportster Hardtail Kit (1982-2003)
• TC Bros King & Queen Seat Mounting Kit
• TC Bros Fender
• TC Bros Sissy Bar

The six 5/16-18 threaded mounts also allow fitment to many other hardtail frames with proper mounting hardware.

Specifications

• Seat pan material: 14GA powder-coated steel
• Upholstery: 100% Marine-grade vinyl
• Construction: Hand-stitched
• Mounting points: Six 5/16-18 threaded inserts
• Patterns available: Diamond or pleated
• Country of origin: USA

Complete Your Sportster Hardtail Build

Pair this King & Queen seat with TC Bros hardtail kits, fenders, sissy bars, and oil tanks to create the ultimate custom Sportster chopper.

TC Bros. Weld-On Front Solo Seat Pivot / Hinge for Bobbers & Choppers

This pivot bracket is made from one piece of 3/16" steel for the ultimate in strength and simplicity. Unlike welded pivot brackets, the one piece design eliminates the possibility of a cracked seat pivot bracket caused by a failed weld. It also makes for a very low profile that looks great on just about every aftermarket spring style solo seat made. The long slotted holes permit a wide range of fitments and allow for adjustability. The finish on the bracket is black powdercoat for durability. This simple design also permits the weld-on mount to be mounted to either a round frame tube or a flat surface without a standoff and without interference to the pivoting action because the weld-on pivot mount is slightly larger in diameter than the rest of the components. The weld-on pivot mount is raw finish steel and ready to weld. The 3/8" hex socket cap bolt is stainless steel, as well as the washer and nylock nut so they will never rust. The replaceable bushings are oil impregnated bronze for a squeak free ride and very long life. Fitment possibilities are nearly endless. If you have a solo seat with springs on it, this bracket will probably fit.

Made in USA.

Chrome Seat Springs (pair)

Hardtail Rigid Cobra Seat

TC Bros. Cobra hardtail chopper seats feature quality American construction and timeless looks. Handmade in the USA, these seats are designed to be a perfect fit to the TC Bros. 1982-03 Sportster weld-on hardtails using their mounting kit and fender.

Five 5/16-18 threaded mounts on the heavy 14ga powder coated steel seat pan make it possible to fit these seats to many other hardtail frames as well. Hand stitched from 100% Marine grade vinyl, these seats look like leather but without the maintenance.

Bolt-on some serious style to your bike with this seat!

Available in diamond or pleaded.

PLEASE CONTACT US FOR AVAILABILITY IF INTERESTED IN PURCHASING THIS ITEM.  INFO@PERTHCOUNTYMOTO.COM

STAINLESS STEEL SEAT HINGE - POLISHED

Overview: This investment-cast stainless steel seat hinge from Biltwell may very well outlast the rest of your motorcycle. Cast in stainless steel and polished, it fits all solo seat pans with protruding hardware in the nose. Two long slots provide a broad range of fore/aft adjustability. This seat hinge features a steel frame bung with self-lubricating bronze pivot bushings. Finished off with a chrome-plated shoulder bolt to fasten the unit to your moto.

• Cast stainless steel
• Mirror polished
• Raw steel frame bung w/ bronze bushings
• Cast Biltwell logo
• Chrome shouldered Allen bolt included

Install Tip: For added insurance, use a drop of your favorite threadlocker when installing the pivot bolt.

Macho Negro Seat Hinge - Black

Overview: This investment-cast stainless steel seat hinge from Biltwell may very well outlast the rest of your motorcycle. Cast in stainless steel and polished, it fits all solo seat pans with protruding hardware in the nose. Two long slots provide a broad range of fore/aft adjustability. This seat hinge features a steel frame bung with self-lubricating bronze pivot bushings. Finished off with a chrome-plated shoulder bolt to fasten the unit to your moto.

• Black electroplated finish
• Raw steel frame bung w/ bronze bushings
• Cast Biltwell logo
• Chrome shouldered Allen bolt included

Install Tip: For added insurance, use a drop of your favourite threadlocker when installing the pivot bolt.

Frame Mount Solo Seat Kit

• Designed for installing Drag Specialties large and small spring solo seats
• Includes spring mount bracket with 3" chrome springs, seat bracket, leather frame cover, and instructions
• Mount is black powder-coated, steel spring mount studs are stainless steel and all other hardware is zinc coated
• Height is determined based on spring style
• Made in the U.S.A.
• Fits 04-06, 10-20 XL
• Mounting kit only. Seat not included

Midline Tuck N Roll

Our newest DIY solo seat features a shape aficionado of the classic chopper game will recognize instantly. The nose, side profile and rear kick are classic Bates.

Hardtail Rigid Mount Solo Seat

TC Bros. rigid mount chopper solo seats feature quality American construction and timeless looks. Handmade in the USA, these seats are designed to be a perfect fit to the TC Bros. 1982-03 Sportster weld-on hardtails using their mounting kit & fender (sold separately). Four 5/16-18 threaded mounts on the heavy 14ga powder coated steel seat pan make it possible to fit these seats to many other hardtail frames as well. Hand stitched from 100% Marine grade vinyl, these seats look like leather but without the maintenance. Bolt-on some serious style to your bike with this seat!

Available in diamond or pleated.

PLEASE CONTACT US FOR AVAILABILITY IF INTERESTED IN PURCHASING THIS ITEM.  INFO@PERTHCOUNTYMOTO.COM

Add a nice billet touch to your ride by changing your cheap stock Phillips head seat bolt with our all-new OG Billet Seat Screw. Includes a matching billet cup washer with a built-in rubber damper specifically designed to reduce the likelihood of loosening over time, ensuring a more secure fit. Comes with our OG Billet Bottle Opener Keychain allowing you to easily install and remove the seat screw due to its mating machined socket. Available in all our anodized and chrome finishes.

Features

• Available in all our Anodized colors & Chrome finishes


• 
  Matching Billet Seat Screw Cup Washer included
  


• Built-in rubber vibration damper specifically designed to reduce the likelihood of loosening over time


• Machined OG logo


• Grooved contour for easy "on the go" installation using the supplied Keychain or standard socket


• 1/4-20 thread
  
  

Fitment

• Fit most late Harley-Davidson models

Installation

Click here for installation instructions

Bates Black Vinyl Solo Seat

Solo seat black vinyl features a metal baseplate which includes studs for mounting springs and nose brackets.
Order mount kits and nose T bracket separately. The two spring studs under the solo seat measure 3-1/8" center-to-center in the front and 7" center-to-center in the rear. *NOTE: Threads are 6mm.

Seat Thumb Screw 1/4 - 20

• Chrome one-piece steel construction
• Wide, deep radiused slot accepts quarter or flat screwdrivers
• Raised diamond knurl on edge
• 1/8" longer for easier seat installation with saddlebags or luggage racks
• Includes nylon washer
• Made in the U.S.A.

FXST and FLST Knurled Seat Bolt Kit - Chrome

• Includes two chrome 1/2"-13 x 5/8" knurled head finger bolts with O-rings

Low-Profile Spring Solo Seat - Distressed Brown

• 1.5" closed-cell foam
• Low-profile 
• 13" L x 10" W x 3/8" H