Free Shipping Over $39.99

Orders $39.99 or more ship free within the contiguous U.S.

Free Shipping Policy

No Restock Fees

Doesn't fit? Don't love it?

Return any unused item within 30 days for a full refund.

No-Hassle Returns

  1. Obtain an RA number
  2. Package your product
  3. Send it back to us!
Return Policy

Price Match Guarantee

Found it for less?

RevZilla will match any advertised price on new merchandise available through another authorized U.S. dealer.

Price Match Policy

Elite Service Rating

Our goal is to provide the best possible shopping experience to every enthusiast who visits RevZilla.

See what our customers are saying about us:

Customer Reviews

ZillaCash Rewards

The ZillaCash rewards program is very straightforward - if you have a RevZilla account, you may already be taking advantage of ZillaCash rewards. Review the following guidelines to see how easy it is to maximize your rewards and put your ZillaCash to work for you.

  • Earn and redeem ZillaCash credit automatically with each order - no fine print, no strings attached, and no hoops to jump through to cash in.
  • All you need is a RevZilla account to start earning - Simply log in each time you shop with RevZilla and we’ll take care of the rest, keeping more money in your pocket just for shopping with us.
  • Earn $5 for Each $100 You Spend on eligible products - up to a maximum of $30 ZillaCash per order for orders totaling $600 or more. Any ZillaCash you earn is automatically applied to the next purchase, so you can sit back, enjoy the ride and feel the savings blow through your hair.
Learn More About ZillaCash

Progressive 444 Shocks For Harley Dyna 1991-2017

Item: P248364

With Frequency Sensing Technology and progressively wound springs, the 444 shocks offer a significant ride upgrade over stock. Read More

$611.96
$679.95
Save $67.99 (10%)

This product is vehicle specific. Please to ensure fitment.

Learn More

Product Details

Progressive Suspension  444 Series FST Shocks For Harley Dyna

After more than a decade of ruling the roads with the road proven shocks, Progressive Suspension unveiled another breakthrough design. Dubbed Frequency Sensing Technology (FST) for its unique ability to dynamically adjust damping as you ride. The result is superior performance no matter the road conditions. A top mount threaded preload adjuster allows for fine tuning with a simple twist of the cap.

Features:

  • Frequency Sensing Technology (FST) allows the shocks to sense the frequency of a bump and automatically adjust damping for superior ride quality
  • Adjust spring pre-load by hand - no special tool needed
  • Progressive-rate spring
  • Deflective disc valving
  • Sold as a pair
  • Made in USA

Notes:

  • Depending on model, your stock shock length is 12" to 13.3"
  • Shock lengths are measured fully extended, eyelet to eyelet on centers
  • A change in height at one end of the bike may require a change at the other
  • Changing ride height can potentially change the trail and mechanical trail
  • Heavy Duty shocks are recommended for bikes operated at or near the OEM maximum load rating over 50% of the time
  • Prior to purchasing shocks that are different than your OEM length, please verify that wheel and suspension travel can be altered without causing clearance issues to the swingarm, axle, frame, tire, fender, chain/belt and guard, and exhaust
Made in the USA
Product Style RevZilla Item # MFR. Product # Availability
Product Style Standard 11 1/2" / Black RevZilla Item #899785 MFR. Product #444-4052B AvailabilityIn Stock: Ships within 24 hours
Product Style Standard 11 1/2" / Chrome RevZilla Item #899786 MFR. Product #444-4052C AvailabilityIn Stock: Ships within 24 hours
Product Style Standard 12" / Black RevZilla Item #899769 MFR. Product #444-4036B AvailabilityIn Stock: Ships within 24 hours
Product Style Standard 12" / Chrome RevZilla Item #899770 MFR. Product #444-4036C AvailabilityIn Stock: Ships within 24 hours
Product Style Standard 12 1/2" / Black RevZilla Item #899771 MFR. Product #444-4038B AvailabilityIn Stock: Ships within 24 hours
Product Style Standard 12 1/2" / Chrome RevZilla Item #899772 MFR. Product #444-4038C AvailabilityIn Stock: Ships within 24 hours
Product Style Standard 13" / Black RevZilla Item #899773 MFR. Product #444-4039B AvailabilityIn Stock: Ships within 24 hours
Product Style Standard 13" / Chrome RevZilla Item #899774 MFR. Product #444-4039C AvailabilityIn Stock: Ships within 24 hours
Product Style Black / Heavy Duty 11 1/2" RevZilla Item #899787 MFR. Product #444-4053B AvailabilityIn Stock: Ships within 24 hours
Product Style Heavy Duty 11 1/2" / Chrome RevZilla Item #899788 MFR. Product #444-4053C AvailabilityOnly 3 Left: Ships within 24 hours
Product Style Black / Heavy Duty 12" RevZilla Item #899775 MFR. Product #444-4044B AvailabilityAvailable: Requires 3-5 business days of lead time prior to shipment
Product Style Heavy Duty 12" / Chrome RevZilla Item #899776 MFR. Product #444-4044C AvailabilityAvailable: Requires 1-3 business days of lead time prior to shipment
Product Style Black / Heavy Duty 12 1/2" RevZilla Item #899777 MFR. Product #444-4048B AvailabilityIn Stock: Ships within 24 hours
Product Style Heavy Duty 12 1/2" / Chrome RevZilla Item #899778 MFR. Product #444-4048C AvailabilityIn Stock: Ships within 24 hours
Product Style Black / Heavy Duty 13" RevZilla Item #899783 MFR. Product #444-4051B AvailabilityIn Stock: Ships within 24 hours
Product Style Heavy Duty 13" / Chrome RevZilla Item #899784 MFR. Product #444-4051C AvailabilityOut of Stock

This product is vehicle specific. Please to ensure fitment.

Fitment Notes & Exceptions
  • Not for Switchback (FLD) models
  • To use the 11.5” shocks on FXDWG models, the fender tip may need to be trimmed or it may contact the belt guard as shown in figure 1 image
  • Prior to purchasing shocks that are different than your OEM length, please verify that wheel and suspension travel can be altered without causing clearance issues to the swingarm, axle, frame, tire, fender, chain/belt and guard, and exhaust
Harley Davidson
Dyna Convertible FXDS 1994-2000
Dyna Fat Bob FXDF 2008-2017
Dyna Glide Custom FXDC 1992
Dyna Glide Daytona FXDB-D 1992
Dyna Glide Sturgis FXDB-S 1991
Dyna Low Rider FXDL/I 1993-2017
Dyna Low Rider S FXDLS 2016, 2017
Dyna Street Bob FXDB/I 2006-2017
Dyna Super Glide Custom FXDC/I 2005-2014
Dyna Super Glide FXD/I 1995-2010
Dyna Super Glide Sport FXDX 1999-2005
Dyna Super Glide Sport Touring FXDXT 2001, 2002, 2003
Dyna Wide Glide FXDWG/I 1993-2017
This item is also available for 60 different models
Harley Davidson
Dyna Switchback FLD 2012-2016
Electra Glide Classic FLHTC/I 1984-2013
Electra Glide Special FLHX 1984
Electra Glide Sport FLHS 1984-1993
Electra Glide Standard FLHT/I 1984-2009
Electra Glide Ultra Classic FLHTCU/I 1987-2018
Electra Glide Ultra Classic Low FLHTCUL 2015-2016
Electra Glide Ultra Limited FLHTK 2010-2018
Electra Glide Ultra Limited Low FLHTKL 2015-2018
FLH 1984-1985
Freewheeler FLRT 2015-2018
Low Glide/Low Rider FXRS 1987-1993
Low Rider Chrome FXRC 1987-1988
Low Rider Sport FXRS-SP 1987-1993
Night Rod Special VRSCDX 2007-2017
Night Rod VRSCD 2006
Night Rod VRSCD 2007-2008
Road Glide Custom FLTRX 2010-2013
Road Glide FLTR/I 1998-2009
Road Glide FLTRX 2015-2018
Road Glide Special FLTRXS 2015-2018
Road Glide Ultra FLTRU 2011-2018
Road King Classic FLHRC/I 1994-2013
Road King Custom FLHRS/I 1995-2012
Road King FLHR/I 1994-2018
Road King Special FLHRXS 2017-2018
Sport Glide FXRT 1987-1992
Sportster Custom XL1200C 1996-2018
Sportster Custom XL883C 1998-2009
Sportster Deluxe XLH883DLX 1989-1992
Sportster Forty-Eight Special XL1200XS 2018
Sportster Forty-Eight XL1200X 2010-2018
Sportster Hugger XLH883HUG 1988-2003
Sportster Iron XL1200NS 2018
Sportster Iron XL883N 2009-2018
Sportster Low/SuperLow XL883L 2005-2018
Sportster Low XL1200L 2006-2011
Sportster Nightster XL1200N 2007-2012
Sportster Roadster XL1200CX 2016-2018
Sportster Roadster XL1200R 2004-2008
Sportster Roadster XL883R 2002-2012
Sportster Seventy-Two XL1200V 2012-2016
Sportster Sport XL1200S 1996-2003
Sportster SuperLow XL1200T 2014-2017
Sportster XL883 2004-2009
Sportster XLH1100 1986-1988
Sportster XLH1200 1988-2003
Sportster XLH883 1986-2003
Street Glide FLHX/I 2006-2018
Street Glide Special FLHXS 2014-2018
Street Glide Trike FLHXXX 2010-2011
Tour Glide Classic FLTC/I 1984-1991
Tour Glide FLT 1984-1991
Tour Glide Ultra Classic FLTCU/I 1989-1995
Tri Glide Ultra Classic FLHTCUTG 2009-2018
V-Rod Muscle VRSCF 2009-2017
V-Rod VRSCA 2002-2006
V-Rod VRSCAW 2007-2010
V-Rod VRSCB 2004-2005
V-Rod VRSCX 2007

Shipping

Orders $39.99 and over qualify for our fast free shipping offer. Click Here for FREE Shipping Terms and Conditions.

Please see our International Orders page for orders shipping outside the US.

We show real-time availability on this product page when you select the size/color item you want.  Most items will ship the same business day an order is placed,however if an item requires additional processing time a message will be shown indicating such.

See our full Shipping Policy for further details.

Returns

If your order arrives and it is not right, we will we'll fix it, NO NONSENSE, we promise.

Doesn't fit or just not happy with it? You can return any new, unused and unaltered item within 30 business days of delivery receipt of your item. We will issue a full refund to your original payment method.

See our full Return Policy for all of the pertinent details.

Product Description
Part Numbers
Fitment
Shipping & Returns
Product Description
With Frequency Sensing Technology and progressively wound springs, the 444 shocks offer a significant ride upgrade over stock. Read More
Part Numbers
Tap To View Part Numbers
Fitment
Tap To View Fitment Details
Shipping & Returns
Tap To View Shipping & Returns Details

Reviews & Questions

4.6 / 5.0
10 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
6
4
0
0
0
Bang For The Buck
4.4 / 5
Features
3.7 / 5
Style
4.7 / 5
Ease Of Install
4.7 / 5
Fit & Finish
5.0 / 5
Durability
4.3 / 5
Bang For The Buck
4 / 5
Great upgrade from stock
I was advised to get the standard 13" 444s after talking to the pros at Progressive customer service, then went straight to Revzilla to buy them. While these do require a lot of trial and error to find your sweet spot (there's no presets or reference points to help you) they are an amazing upgrade from stock. Progressive suggested a sag of 3/4". Even at the lightest setting my sag is 1/2" and I weigh 230 & don't ride with luggage or carry a passenger on the back. So be careful if your'e considering getting the heavy duty 444s you might find them too stiff and unable to adjust to your comfort level.
June 29, 2015
Bang For The Buck
4 / 5
throw away your factory shocks
Put a set of these on my '08 FXDB I weigh 205, no more bottoming out on potholes. No more mushy feeling when you
hit the gas. Far better ride and overall performance than the OEM shocks...

The only reason I am keeping my old shocks is if ever I get another bike these will fit, they are coming with me....
May 31, 2016
Purchased
1 year ago
Ride:
2008 Harley Davidson Dyna Street Bob FXDB/I
Bang For The Buck
5 / 5
I'll never go back to stock
I bought these in 13" and put them on my '09 Street Bob probably about 10k miles ago. ....I should have done this from the start.
I have a sundowner seat. That seat and the shocks make for a very nice, comfortable ride. Yet firm enough to feel planted taking corners...faster than I should.

I since sold the Street Bob and bought the Low Rider S and the 444's were transferred to the new ride. As long as I have a Dyna I will have the 444's.

....if only they made it in 13.5" or 14".
July 12, 2016
Ride:
2009 Harley Davidson Dyna Street Bob FXDB/I
This product is a big improvement over stock shocks!!!
The riding comfort on my 2014 Super Glide has improved remarkably, as well as the handling. No more bottoming out over bumps and speed humps. My spine also thinks these Progresive shocks are great.

Lee Forsythe
July 27, 2015
Purchased
over 2 years ago
Ride:
2014 Harley Davidson Super Glide Custom FXDC/I
Bang For The Buck
4 / 5
Great shocks
install was pretty easy. Needed a vice to insert the provided bushings. Only issue was the stock bolt cover on my 2016 Street Bob would not fit back over the top of the new shock bolting location.
May 28, 2016
Purchased
1 year ago
Ride:
2016 Harley Davidson Dyna Street Bob FXDB/I
Excellent upgrade from stock.
These Progressive 444's made a big difference in handling on my 2009 FXDC. Also added Ricor Inertia active vales to the stock front fork. The combination helped turn the cruiser into a competent sports tourer.
October 13, 2014
Ride:
2009 Harley Davidson Super Glide Custom FXDC/I
Bang For The Buck
5 / 5
Major improvement in stability and Handling
I had never upgraded from stock before on my other bikes. These shocks are awesome. Right out of the shop I noticed the improved ride. Wife jumped on the back, I dampened the setting, and what a noticeable difference with my DWG in stability and handling.
July 24, 2016
Ride:
2011 Harley Davidson Dyna Wide Glide FXDWG/I
Bang For The Buck
3 / 5
Features
4 / 5
Style
5 / 5
Ease Of Install
4 / 5
Fit & Finish
5 / 5
Durability
4 / 5
444 Shocks
I love the look and appearance of them, a little pricy though. They are way better than stock though. It would have been nice to know you needed a vice to get the 2 inserts/bushings into each side of the shock. I didn't have a vice so I had to improvise with some big hand held wood working vices I had. I got it done it just took a lot longer than needed. Due to the weather I haven't gotten to ride much since putting them on to fine tune them yet so maybe the ride quality will get a better mark once I get to do that.
February 8, 2017
Purchased
1 year ago
Bang For The Buck
5 / 5
Features
3 / 5
Style
4 / 5
Ease Of Install
5 / 5
Fit & Finish
5 / 5
Durability
5 / 5
Night & day
These shocks are great they make the ride so much better it like night and day
February 9, 2017
Purchased
1 year ago
Bang For The Buck
5 / 5
Features
4 / 5
Style
5 / 5
Ease Of Install
5 / 5
Fit & Finish
5 / 5
Durability
4 / 5
SO FAR VERY PLEASED
Installed 13 inch heavy duties along with the front cartridge fork kit. Only had them on the bike for a couple weeks but the motorcycle is completely transformed. much better "in the road" feeling.
November 18, 2016
Purchased
1 year ago
25 Customer Reviews
25 4.5/5
Read All Reviews
20 Questions & 27 Answers
Ask A Question