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Progressive Suspension 412 Chrome 11-1/2" Standard Shocks

J&P Cycles Part Number: 137-659

Manufacturer Part Number: 412-4254C

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Description for Progressive Suspension 412 Chrome 11-1/2" 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 11-1/2" 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

  • America : 2004–2014
  • America LT : 2014
  • Bonneville America : 2002–2003
  • Speedmaster : 2003–2014
Customer Reviews

Customer Reviews for Progressive Suspension 412 Chrome 11-1/2" Standard Shocks

Overall Rating

5 out of 5 stars (based on 9 reviews)

5 stars (6)

4 stars (2)

3 stars (1)

2 stars (0)

1 star (0)

0 stars (0)


works as described


Great shock better than stock air shock.It lowered my bike about 2 inch witch was perfect.thanks for the price!!


love these


Nice shocks. A lot better then the OEM. Even on the lowest (softest) setting I have not bottomed out riding on the same bumpy roads the OEM did on the stiffest setting.


very good item


Excellent quality product with a nice chrome finish. No flaws in the chrome or paint, I am glad I spent the extra bit for the shocks instead of the house brand.


Good Looks, Good Fit, Decent Price

West Texas Infidel

Beautiful finish, INCREDIBLY stiff. I realize being 1 1/2" shorter than stock they would need to be stiffer but not only have they never bottomed out on the lowest setting, it takes a lot to make them move at all (and I ain't no light weight). Far too rough riding for a 60 year old. I will be sending my factory air shocks to get lowered and sell these to somebody younger than me.


Great product.

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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