GP Suspension 49MM DLC Coated Harley Fork Tubes in 24 7/8" Length

True Diamond-Like Carbon Technology

Our fork tubes feature genuine CERTESS Carbon DLC coating applied by Northeast Coating Technologies in Maine - not the cheap PVD coatings that others pass off as "DLC." This is authentic diamond-like carbon technology from HEF Group, the global leader in advanced surface treatments.

Use: OEM bottoming assembly has been removed. Tubes are ready for installation of GP Suspension 25mm cartridge kit for a 2" over bagger kit. 

Uncompromising Performance Specifications

Hardness: 2,500 to 6,000 HV - up to 20 times harder than chrome

Ultra-Low Friction: Coefficient of friction as low as 0.10 in dry conditions, less than 0.10 when lubricated - dramatically reducing stiction and improving suspension response

Extreme Durability: Diamond crystal structure with SP3 bonding creates a surface that will never wear out under normal use

Why Our DLC Coating is Superior

Real Diamond-Like Carbon: Combines the hardness of diamond (1,500-3,200 HV) with friction coefficients 5-10 times lower than conventional hard coatings

Advanced PACVD Process: Applied at only 170°C using plasma-enhanced chemical vapor deposition - maintaining the integrity of your fork tubes while creating an incredibly dense, chemically inert surface

Multi-Layer System: Includes multiple sublayers (Cr, CrN, WC-C) with a top layer of amorphous carbon for optimal adhesion and performance

The Difference You'll Feel

Eliminating Stiction: The ultra-low friction surface allows your suspension to respond to the smallest inputs, dramatically improving small bump sensitivity and overall ride quality.

Consistent Performance: Excellent friction properties with no dimensional changes - your suspension works exactly as designed, every time.

Lifetime Durability: This isn't a coating that wears off. The diamond-like carbon structure is so hard and wear-resistant that it will outlast your motorcycle.

Northeast Coating Technologies Excellence

Our tubes are coated at Northeast Coating Technologies in Kennebunk, Maine - part of the HEF Group with state-of-the-art TSD 850 PVD/PACVD machines using patented HEF technology. This isn't backyard PVD work - this is aerospace and medical-grade surface treatment technology.

Don't settle for cheap PVD coatings that wear off. Experience the difference that genuine DLC technology makes in your suspension performance.

Use: OEM bottoming assembly has been removed. Tubes are ready for installation of GP Suspension 25mm cartridge kit for a 2" over bagger kit.