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Progressive Suspension 412 Chrome 13" Standard Shocks

J&P Cycles Part Number: 137-660

Manufacturer Part Number: 412-4248C

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Description for Progressive Suspension 412 Chrome 13" Standard Shocks

• Gas charged

• Multi-stage, velocity-sensitive internal valving automatically adjust to riding conditions

• Include chrome springs and end covers

• Designed specifically for cruisers

• Progressively wound steel spring provides superior ride and handling

• Adjustable spring pre-load cams allow for different load and ride characteristics

• Double-walled steel construction for durability

• Available in several lengths for custom applications

Product Specs

Product Specs for Progressive Suspension 412 Chrome 13" Standard Shocks

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

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Compatible Models

Triumph Models

  • Bonneville : 2001, 2003–2014
  • Bonneville Black : 2007
  • Bonneville SE : 2009–2013
  • Bonneville T100 : 2003–2014
  • Bonneville T100 Black : 2010, 2014
Customer Reviews

Customer Reviews for Progressive Suspension 412 Chrome 13" Standard Shocks

Overall Rating

5 out of 5 stars (based on 6 reviews)

5 stars (6)

4 stars (0)

3 stars (0)

2 stars (0)

1 star (0)

0 stars (0)


I want to talk about how easy it was to instal the Progressive 412 shocks on my 2007 FLHR. The tools I used were a 3/4 in socket, a foot pound torque meter and a mc/atv floor jack. I recently uninstalled and installed my wheels to have new tires mounted and replaced brake pads on front and rear. Mounting the shocks was the easiest of these three maintenance events. If you have the above mentioned tools you can replace your own shocks.


The Gold Card price for these shocks make them a real performance bargain. They're performing better than I expected. I love 'em!


shocks worked very well. very happy with them


Looks great,easy to install.


Love them. Makes my sportster ride almost like a soft tail.


I only expect a fantastic improvement on my 1997 Valkyrie. My OEM shocks are tired and all reports suggest that these progressive shocks will be much better than the OEM units. Thanks for the great delivery time JP

Important Product Notes

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

Note: Standard Duty shocks are for ride loads under 225 lbs., Heavy Duty shocks are for ride loads regularly over 225 lbs.

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