Steel Thunder Custom Cycles - aftermarket motorcycle parts for Harley-Davidson and American custom bikes.
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Steel Thunder Custom Cycles

152 York Drive

Marshfield, MO 65706

417-468-2326

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SPORTSTER SHOCKS

BUELL PARTS

V-ROD PARTS

SHOCK INFO (TECH)

METRIC PARTS

Shock Absorbers for American Motorcycles - Free Shipping*

FOR SPORSTER SHOCKS CLICK HERE

Lowering Kits near bottom of page. For Metric Shocks Click Here

Progressive 412 Series

Style A

Style B

Style C

Style D

STEEL BODY SHOCK ABSORBER SETS FOR BIG TWIN & SPORTSTER - Progressive Suspension

412 Series.
Multistage velocity sensitive internal valving, double walled steel bodies and precision ground hardened steel shafts for fade free operation with a consistent ride over a variety of surfaces and extended seal life.
Spring pre-load is easily set with a cam type adjuster.
Shock length is measured from center of eye to center of eye (always verify existing shock length before ordering).
Includes a spring pre-load adjusting tool.
Instructions are included.
Made in the U.S.A.

PRICES INCLUDE FREE SHIPPING*

Note: When using shocks shorter than OEM, check all related parts such as tire to fender clearance with shock fully compressed, headlight aim and Jiffy stand lean angle.

Model & Year
Size & Style
Part # Price Buy Now
Big Twin 4 Speed 58/72
13.6"/A
0129061 $298.98
Big Twin 4 Speed 73/86 (except Softail)
11"/A
0129069 $298.98
Big Twin 4 Speed 73/86 (except Softail)
11"/B
0129062 $298.98
Big Twin 4 Speed 73/86 (except Softail)
12"/A
0129063 $277.98
Big Twin 4 Speed 73/86 (except Softail)
12"/B
0129057 $277.98
FXR 82/Later
11"/C
0129048 $277.98
FXR 82/Later
11.5"/D
0129050 $277.98
FXR 82/Later
12.5"/D
0129052 $277.98
Dyna models 91/05(except FXDX & FXDXT) & FXDBI 06/L
11"/B
0129065 $277.98
Sportster 79/03
11"/C
0129048 $277.98
Sportster 79/03
11.5"/D
0129050 $277.98
Sportster 79/03 12.5"/D 0129052 $277.98

Air Suspension Shocks are height adjustable.  Best ride quality and high style!

Ride high or low in comfort and style!

Air compressor and hardware included.

NEW!  Legend Air Suspension Systems - Independent Cycle, Inc.

  • Best ride quality, solo or dual.
  • Fade-free damping; no bottoming-out under any weight or road condition.
  • Raise for comfort and clearance; lower for reduced seat height and low profile look.
  • Only shocks available with onboard compressor and solenoid valve.
  • Patent-pending design.
  • Exclusive Kevlar® air spring technology.
  • Deflective disc shocks with gas-cell reservoirs.
  • CNC-machined from 2011 T-6 and 6061 T-6 billet aluminum with chrome finish.
  • Systems include an air compressor and hardware.
  • Measure 9.75" compressed; 13" extended.
  • Performance and quality proven under extensive testing.
  • Made in the U.S.A.!

#DS2404-1000 - FOr 85-98 FLT (L1 CE series) ... $1453.99 including shipping*.

Please note: This is a special order item. While most items ship the same or next business day, this item will take a few extra days to ship. No express delivery is available. No returns on Special Order items.

L2 Air Suspension System with Kevlar Air Spring Technology, for 2000 - 2007 Softail motorcycles.

DS1311-0063

L8 Air Suspension System from Legand for 89-99 Softail motorcycles.  These also fit most aftermarket frames.

DS1311-0068

L2 AND L8 AIR SUSPENSION SYSTEMS - Legend Air Suspensions - Independent Cycle, Inc.

The original has just gotten better – redesigned with NEW lower pricing.
Features exclusive Kevlar® Air Spring technology.
Best ride quality; offers no bottoming out under any load condition.
Hydraulic dampening valved to offer a smooth ride.
CNC-machined 6061 T6 billet aluminum.
NEW color-coded plug and play wiring for quick and easy installation.
Installs in stock location; no modifications necessary .
Includes universal micro toggle switch, on-board air compressor, solenoid valve and all necessary hardware.
Performance and quality proven under extensive testing.
Made in the U.S.A.

FOR 00-07 SOFTAILS (L2)
Part #DS1311-0063 - Machined ... $1,053.00 including free shipping*


Part #DS1311-0064 - Black ... $1,080.00 including free shipping*

Part #DS1311-0065 - Chrome ... $1,156.50 including free shipping*

FOR 89-99 SOFTAILS (L8)
Part #DS1311-0066 - Machined ... $1,053.00 including free shipping*


Part #DS1311-0067 - Black ... $1,080.00 including free shipping*

Part #DS1311-0068 - Chrome ... $1,156.5 including free shipping*

NEW!

Progressive Suspension Airtail Rear Shocks for FLT.

Progressive Suspension Airtail Rear Shocks for FLT

 

 

Optional on-board compressor kit.  Or buy hand pump.

On-Board Compressor Kit

 

Hand pump for airtail shocks.

Hand Pump

 

AIRTAIL REAR SHOCK ABSORBERS FOR FLT - Progressive Suspension

State of the art integrated air and coil shock absorber utilizes a linear rate coil combination with dual chamber air shocks for a smooth ride and ultimate suspension control.
These chrome plated shocks ride like traditional high-end shocks while still allowing for extensive height and spring rate tuning.
Inertia Active System (I.A.S.) with inertia valve technology separates wheel movement from chassis movement.
High pressure gas charged for consistant damping performance.
Dual chambered technology offers one air chamber for bottoming control and adjusting suspension for the bike's load.
The second air chamber adjusts ride height.
13" eye to eye shock length.
Shocks use a manual fill system with an optional on-board compressor kit available.
The on-board compressor kit includes a chrome plated rocker box mounted bracket and cup that houses an air pressure gauge.
The rocker box bracket fits 1999/Later Twin Cams, so by relocating the air pressure gauge the air compressor will fit 1980/1998 models.
The optional hand pump is an economical means of adding air pressure if the on-board compressor is not desired
Includes instructions.  Made in the U.S.A.

Part#: MU29018 - Chrome Plated Shock Set - Fits FLT 1980/Later ...
$1186.99 including free shipping*



Part#:MU29251 - On-Board Compressor Kit - Fits FLT 1999/Later ... $660.99 including free shipping*


The hand pump is designed for people that won't be constantly changing the ride height. You can just set it and forget it and enjoy a better ride than was previously available from any other shocks available

.The correct way to adjust air suspension pressure in front or rear suspensions.
Aluminum construction.
Easy to read 1.5" dial face.
4" long hose swivels 360° and clips to the handle for storage.
Connector valve is specially designed so that no air will be lost when removed.
A push button bleed-off valve saves time when adjusting pressure.
Instructions included.

100 Maximum PSI Reading
6.9 Maximum Bar Reading
2 PSI Increments
Optional Hand Pump Part for FLT #MU20117 ... Price $54.45 (ships free with shocks, call to purchase alone.)

Airtail Rear Shocks for Softail 2000/L.  Air pressure controlled ride height.  Use on-board compressor or hand pump.

Progressive Suspension

 

 

 

 

On Board Compressor Kit for Airtail Shocks - take it EASY and ride in comfort.

Progressive Suspension

 

Hand pump for airtail shocks.

Hand Pump

Airtail Rear Shocks for Softail 2000/LContol your ride comfort and height, riding alone or with a passenger. and 1989/1999 - Progressive Suspension

Air pressure controlled ride height (down to 2" lowered seat height) is easily adjusted on the fly by the optional on-board compressor kit. (See below.) The optional hand pump is an economical means of adding air pressure if the on-board compressor kit is not desired.
One shock of the chrome plated set is conventional and incorporates a coil spring and damper assembly. This shock basically supports the weight of the motorcycle and controls the compression/rebound dampening characteristics. The other shock features two separate air adjustable chambers. One chamber is used for the rider/passenger's weight and the other is used to control the ride height.
The advantage of the airtail system is that the air compresses at a progressive rate and easily solves the age old problem of bottoming out (even when running in the lowered state).
The on-board compressor kit includes a chrome plated coil cover that houses an air pressure gauge, rocker switch for adding air to each chamber and two push button air bleed valves. The air compressor itself mounts to the rear fork axis tube and no modification is required to your existing parts for installation. Instructions are included.
The hand pump is designed for people that won't be constantly changing the ride height. You can just set it and forget it and enjoy a better ride than was previously available from any other shocks available. Made in USA.

Shock sets. Part#:MU29095 Fits Softail 2000/2004. ... Price $739.95 including free shipping*

Shock sets. Part# MU29094 Fits 1989/1999 ... Price $739.95 including free shipping*

Also purchase compressor or hand pump below:

Optional On-Board Compressor Kit for Airtail Shocks

The advantage of the airtail system is that the air compresses at a progressive rate and easily solves the age old problem of bottoming out (even when running in the lowered state).

The on-board compressor kit includes a chrome plated coil cover that houses an air pressure gauge, rocker switch for adding air to each chamber and two push button air bleed valves. The air compressor itself mounts to the rear fork axis tube and no modification is required to your existing parts for installation. Instructions are included. Made in USA.

On-Board compressor kit.Part # MU29245 - Fits Softail 1989/1999. Price $676.67 including free shipping*

On-Board compressor kit Part#:MU29246 - Fits Softail 2000/Later. Price $676.67 including free shipping*

The hand pump is designed for people that won't be constantly changing the ride height. You can just set it and forget it and enjoy a better ride than was previously available from any other shocks available.

The correct way to adjust air suspension pressure in front or rear suspension.s
Aluminum construction.
Easy to read 1.5" dial face.
4" long hose swivels 360° and clips to the handle for storage.
Connector valve is specially designed so that no air will be lost when removed.
A push button bleed-off valve saves time when adjusting pressure.
Instructions included.

300 Maximum PSI Reading
20 Maximum Bar Reading
10 PSI Increments
Optional Hand Pump Part #MU20115 ... Price $51.45 (ships free with shocks, call to purchase alone.)

Lowers seat height as much as 2"

Progressive Adjustable Length Shock Absorbers for Softail motorcycles.

ADJUSTABLE LENGTH SHOCK ABSORBER SETS FOR SOFTAIL - Progressive Suspension

Chrome Plated.
Lowers seat height as much as 2".
These 422 Series shocks are designed to provide the ultimate in ride quality.
Features Inertia Active System (I.A.S.) damping. This type of "state of the art" valving senses the difference between chasis movement and wheel movement. When the wheel encounters a pot hole or expansion joint the damping changes instantly from firm to soft allowing the wheel to move rather than having the jolt transmitted to the chassis and the rider.
Progressive wound springs further enhance the ride quality by increasing in tension relative to the amount of shock travel.
Nitrogen charged to help eliminate dampening fade unde extreme conditions and high heat.
Large windows in the shock covers provide a unique look while eliminating internal corrosion.
3/8" drive tool is included for spring tension and ride height adjustment.
Instructions and Tool are included.
Note: FLSTN models have a 1" lowered ride height from the factory so these shocks must be adjusted accordingly. When reducing ride height, always check headlight aim and correct lean angel on jiffy stand.

Part#:MU29098 Fits Softail 2000/Later ... $445.46 including free shipping*


ADJUSTABLE SHOCK ABSORBER SETS FOR BIG TWIN & SPORTSTER - HARDBODY by SWAY-A-WAY

Four separate adjustments allow you to fine tune to your exact preference and load weight.
Two separate adjustments are provided for compression and rebound dampening by means of allen type screws.
The ride weight and coil spring pre-load is set with its unique threaded top collar and can be locked in place anywhere along its two inches of travel.
Pre-filled with 110 psi of nitrogen that can be adjusted all the way down to 75 psi.
The pointed cap on the piggyback reservoir hides a schrader valve.
Both ends of the shocks and the piggyback reservoir are made from billet aluminum and are highly polished.
Factory rebuildable.
Mounting eyelets measure 1/2" I.D. and include 3 different pairs of spacers for alignment: 1/16", 1/8" & 1/4" (shock lengths are measured eye to eye).
Includes instructions. Made in the U.S.A. Polished.

Length: 12 1/2", Polished - Fits FLT 1980/Later, FXR 1982/Later, Dyna 1991/Later (Except FXDX & FXDXT) and Sportster 1979/2003 - Part #: MU29089 ... $420.44 including free shipping*


NEW!

Pair of motorcycle shocks for 2000 and later softails.

Shocks include hardware and tool.

SHOCK ABSORBER PAIR FOR 2000/LATER SOFTAIL - V-Factor

High quality replacement shock absorber.
Non-adjustable.
Adjust able spring preload.
Includes preload adjusting tool.
Includes rubber bumpers and chrome plated cup washers.

Part#:MU29010 - Chrome Plated Set, Fits Softail models 2000/Later (except FXST Rocker models) ... $
147.76 including shipping*


Adjustable Length Shock Absorbers for Softails.

Adjustable Length Shock Absorbers for Softail - byV-Factor

Adjustable on bike.
Shock length can be adjusted from minus 1/2" through plus 1 1/2".
Adjustable spring preload. Use Mid-USA tool part 29224.
Instructions included.
Sold in pairs.

Adjustable length shock absorbers. Fits Softail 1989/1999 & most custom Softail style frames. Chrome plated.
Part #MU29096 - Price $209.44 including free shipping*

.
Call or write for availability

Optional Shock Absorber ToolOptional Shock Absorber Tool Part #MU29224 ...$5.50 (ships free with shocks, call to purchase alone.  Please note $35 minimum order.)


Lowered Shock Absorber Sets for Softail - made in the USA.

Lowered Shock Absorber sets for Softail - Chrome - Hardbody by Sway 4 Way

These U.S.A made shocks are 11.07" long which lower the seat height of Softails 3/8". These shocks also offer spring pre-load adjustment of up to six full turns. The spring rate of 1000lb. (in.) is the same as the OE shocks. The precision manufacturing techniques used allows for high tolerance and concise valving. To help prevent high temperature shock fade, a nitrogen filled gas chamber has also been incorporated into each shock. Mounting eyelets include urethane bushings with steel inserts for long life. Fits Softail 1989/1999. Also fits all HARDBODY Softail style frames.

Part#:MU29086 - Lowered Chrome Shocks. Fits Softail 1989/1999. Also fits HARDBODY Softail frames ...Price $480.02 including free shipping*                                                                   

Part#: MU29097 - Lowered Chrome Shocks.  Fits Softail 2000/Later ... $445.46 including free shipping*                                               


Black lowered shock absorber set for Softail and Hardbody softail style frames.

Lowered Shock Absorber sets for Softail - Black - Hardbody by Sway 4 Way

These U.S.A made shocks are 11.07 long which lower the seat height of Softails 3/8. These shocks also offer spring pre-load adjustment of up to six full turns. The spring rate of 1000lb. (in.) is the same as the OE shocks. The precision manufacturing techniques used allows for high tolerance and concise valving. To help prevent high temperature shock fade, a nitrogen filled gas chamber has also been incorporated into each shock. Mounting eyelets include urethane bushings with steel inserts for long life. Fits Softail 1989/1999. Also fits all HARDBODY Softail style frames.

Part#:MU29087 - HARDBODY Black. Fits Softail 1989/1999. Also fits HARDBODY Softail frames ... Price $238.36 including free shipping*

Springer front shock.
FRONT SHOCK - Works Performance Shocks

Chrome replacement shock for all OEM Springer forks.
Features plush damping with more ride control.
Made in the U.S.A.

Part #: DRDS-310094 For 88-06 FXSTS and 97-03 FLSTS, 05-07 FLSTSC Springer models ... $181.96 including shipping*

FOR SPRINGERS

Damper for Springers.

31 SERIES SPRINGER DAMPER - Progressive Suspension

Velocity-sensitive damping provides superior damping performance.
Attractive chrome finish.
Dual-wall construction for extra durability.

Part #: DR DS-311001 For 97-03 FLSTS, 05-07 FLSTSC, 88-06 FXSTS Springer models ... $172.96 including shipping*

Please note: This is a special order item. While most items ship the same or next business day, this item will take a few extra days to ship. No express delivery is available. No returns on Special Order items except for manufacturer defect.

NOT SHOCKS

Look like shocks, but are struts: replaces shock, makes your bike a "rigid".

Lowers bike approx. 4"

Look like shocks, but are struts that replace shocks.

BILLET NOT SHOCKS - Perse Performance

Machined from 6061 aluminum with a chrome finish.
Looks like shocks, but really are struts that replace OEM shock absorbers.
Lowers bike approximately 4” depending on application and model.
Includes hardware.
Available in 9 1/2” and 10 1/2” lengths.
Sold in pairs.

FOR 84-03 XL AND 91-05 FXD MODELS

Part#: DS2404-0000   - 9 1/2” Not Shocks ... $185.96 including shipping*

Part#: DS2404-0001  - 10 1/2” Not Shocks ... $185.96 including shipping*

Please note: This is a special order item. While most items ship the same or next business day, this item will take a few extra days to ship. No express delivery is available. No returns on Special Order items.

Motorcycle lowering block kit.

MU29226

 

REAR LOWERING BLOCK KITS FOR BIG TWIN (lowering kits for Sportster on Sportster Shock page. )
  • Reduces the rear ride height by repositioning the lower shock mount further back.
  • More economical than buying shorter rear shocks.
  • Easy to install.
  • Includes installation instructions and all required hardware.
  • Prices include shipping*. Burly Brand. Made in the U.S.A.

    CHART BELOW:

motorcycle lowering block kits - please refer to chart below.

MU29207

motorcycle lowering block kits - please refer to chart below.

MU29249

motorcycle lowering block kits - please refer to chart below.

MU29232

motorcycle lowering block kits - please refer to chart below.

MU29241

Model & Year Ride Height Special Notes Finish Part # Price Buy Now
FLH & FLT 1985/1996 (air shock models)
-1-1/2"
Some models require modification to the saddlebag mount for sufficient clearance. Black MU29226 $111.57
FLH & FLT 1997/2001
- 1"
Will not fit FLHRCI (Road King Classic with OEM hard leather saddlebags). Black MU29243 $111.57
Chrome MU29207 $131.01
FLH & FLT 2002/2003
-1"
Some models require modification to the saddlebag mount for sufficient clearance. Do not use with lowered shocks. Black MU29249 $126.15
FLH & FLT 2004/Later
-1"
Will not fit classic models with OEM hard leather saddlebags. Black MU29249 $126.15
FXR 1987/1994
-2"
Will not fit FXRT or FXRP with OEM saddlebags. Chrome MU29232 $101.89
Dyna 2000/2001
-1"
Will not fit FXDS convertible with OEM saddlebags or FXDL. Use with 12-1/2" OEM shocks only. Polished MU29241 $131.01
For SPORTSTER Lowering Block Kits go to the Sportster Shock Page.
Rear Fork Lowering Kit for Softail 2000/Later.
REAR FORK LOWERING KITS FOR SOFTAIL - Progressive Suspension

These kits are designed to be used with OEM rear shocks to lower a Softail model motorcycle as much at 2" depending on the kit used. Kits are chrome plated. After the shocks are removed from the bike, installing the kit can be done by using a shop press. Installation instructions are included.
Part#:MU29238 - Chrome plated adjustable kit. OE height to 2" lower. Includes rubber bumpers and cup washers. Fits Softail 2000/Later. ... $118.68 including shipping*


*FREE SHIPPING APPLIES IN CONTINTENTAL 48 UNITED STATES ONLY. AK, HI and APO/FPO will have additional shipping fees. We ship only within the U.S.A. and to APO/FPO (military addresses; weight and size restrictions apply.). We do not accept foreign credit cards. We do not ship to Puerto Rico.

Prefer to call in your order to Steel Thunder? Call toll-free: 1-866-889-7828. 9-5 CST M-F.

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Please note that all prices are subject to change.