World's Largest Aftermarket Motorcycle Parts and Accessories Superstore!


Progressive Suspension 428 Black Monoshock Standard Shock

Manufacturer Part Number 428-1001B

J&P Part: 166-3959 On Sale!

This product fits a variety of motorcycles. Please select yours so we can find the right part and guarantee fitment. Select A Motorcycle

$314.96 Save 10%! Regularly: $349.99

Shipping & Delivery

Checking availability...

– Order in the next to ship today

[+] Pickup in our Retail Stores

Description for Progressive Suspension 428 Black Monoshock Standard Shock 

Progressive Suspension 428 Black Monoshock Standard Shock

• The 428 Series monoshock represents the rare combination of high performance and low cost. Designed specifically for the smaller bore sportbikes and adventure touring bikes that are now seeing real riders and real miles. Incorporating proper spring rates and specifically tuned deflective disc dampers combined with a gas charge to prevent oil foaming and wrapped in all aluminum body, the 428 opens up a whole new world of possibilities for this segment of fun to ride machines. Each 428 also utilizes a threaded body for fine tuning spring pre-load to match your riding style and load.

• Stylish looks

• Smoother ride

• Improved stability

• High pressure gas charged monotube for consistent damping performance

Notes: See Progressive Suspension website for technical information and notes at

Made In The USA This product was proudly made in the USA

Product Specs

Gas Filled: Yes

Length: 11.1

Manufacturer Part Number: 428-1001B

Material: Aluminum

Sold in Units: Pair

Standard or Heavy Duty: Standard Duty

Warehouse Part Number: 1296837

Customer Reviews for Progressive Suspension 428 Black Monoshock Standard Shock 

This product has not yet been reviewed. Be First To Write A Review

Fast Free Shipping on Orders at $99.99 & Over
Free Tech
120 Day

Select Your Motorcycle

Live Help

Get Help From Our Industry Experts

Call Us
7 a.m.–9 p.m. CST (Monday-Friday)
8 a.m.–6 p.m. CST (Saturday-Sunday)
Labor Day: 8 a.m.–6 p.m. CST


Help / FAQs