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Progressive Suspension 412 Chrome 11.5
Read ( 13 ) Reviews

Progressive Suspension 412 Chrome 11.5" Standard Duty Shocks

J&P Cycles Part Number: 137-659

Manufacturer Part Number: 412-4254C

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Description for Progressive Suspension 412 Chrome 11.5" 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 Chrome 11.5" Standard Duty Shocks

Full Covers:
Manufacturer Part Number:
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

Triumph Models

  • America : 2003–2017
  • America LT : 2014–2017
  • Bonneville America : 2002–2006
  • Speedmaster : 2003–2016
Customer Reviews

Customer Reviews for Progressive Suspension 412 Chrome 11.5" Standard Duty Shocks

Overall Rating

5 out of 5 stars (based on 13 reviews)

5 stars (9)

4 stars (3)

3 stars (1)

2 stars (0)

1 star (0)

0 stars (0)

sb43 on 6/23/2019

Installed these and Race Tech front fork springs, (had those shortened an inch), and now that big Ultra Classic handles like a dream. I can now handle my bike with ease. I'm a shorter guy, so moving the bike in the garage and parking spaces was a chore.

Tshea59 on 3/1/2019

4 Star

abalog on 3/1/2019

5 Star

Dawn Lozell on 3/1/2019

5 Star

hotairnow0518 on 4/17/2018

Great product.

West Texas Infidel on 11/15/2016

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.

harleyjon on 6/6/2014

Good Looks, Good Fit, Decent Price

harvmaniac on 6/27/2013

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

M&Mproject on 1/10/2013

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.

twbama52 on 8/23/2012

very good item

Important Product Notes

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

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