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Progressive Suspension 412 Black 12" Standard Duty Shocks

J&P Cycles Part Number: 137-663

Manufacturer Part Number: 412-4051B

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Description for Progressive Suspension 412 Black 12" Standard Duty Shocks

The 412 Series shocks are simply the best value shock on the market. The have a simple, durable design which means they will be an improvement to your motorcycle's suspension performance for as long as you are riding. They feature a doublewall steel body construction with nitrogen charged, multi-staged velocity sensitive valving resulting in smooth, consistent damping. A cam style preload adjuster lets you dial in your ride whether you're a light or heavy rider.

• 5-position cam style preload adjuster

• High Pressure Gas Charged for consistant damping performance

• Standard or Heavy-Duty progressive rate springs

• Available in chrome or black

• Backed by a one-year limited warranty

Product Specs

Product Specs for Progressive Suspension 412 Black 12" Standard Duty Shocks

Full Covers:
Manufacturer Part Number:
Shock Length:
Shock Style:
Gas Filled
Sold in Units:
Standard or Heavy Duty:
Standard Duty
Warehouse Part Number:
Fitment Questions?

With over 750 years of experience combined, our tech staff has the answers!

Compatible Models

Harley-Davidson® Models

  • V-Rod Night Rod VRSCD : 2006–2007
  • V-Rod VRSCA : 2002–2006
  • V-Rod VRSCB : 2004–2005
Customer Reviews

Customer Reviews for Progressive Suspension 412 Black 12" Standard Duty Shocks

Overall Rating

5 out of 5 stars (based on 12 reviews)

5 stars (11)

4 stars (1)

3 stars (0)

2 stars (0)

1 star (0)

0 stars (0)

RANDY on 12/10/2019

These shocks made my 2007 nightster ride so much better than the stock ones. Highly recommend.

ART on 6/11/2019

much better than stock HD

2stowned on 3/1/2019

5 Star

rockabilly1159 on 3/1/2019

5 Star

velasco.luigi on 3/13/2017

Very easy to install, just get a lift to play with the rear axle height. I usually drive in Mexico City (full of crater-like potholes). Comfort was dramatically improved, softer riding sensation while having better stability. I combined the shocks with the Progressive Monotube Cartridge Kit, the bike feels sporty, stable and under control while driving, without losing confort. Completely new bike!

George Charles on 5/17/2016

Always happy with Progressive Products - Always happy with JP Cycle Service

Thomasj62 on 6/26/2015

Excellent ride and comfort

msibert on 6/19/2015

ez install look great on bike .

mauriceschneider85 on 4/24/2015

shocks look grate on my bike


Got rid of my stock air ride to get these shocks. A big improvement over stock. Can adjust for single or double up touring in just a few seconds. Should have bought these sooner!

Important Product Notes

Note: When shocks are different than stock length, clearance must be carefully checked for potentially dangerous interference.

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