Now you can get a longer front fork without having to install longer inner fork tubes. These fork tube extensions replace the stock fork tube caps and are made from solid, hi-grade steel with a chrome finish. Available for most 39, 41 and 49mm applications in 2" (5 cm), 4" (10 cm) and 6" (15 cm) length. Most bikes can use 2" or 4" extensions without the need for longer brake lines, 6" extensions however must always be installed with longer brake lines. Fork tube extensions are sold in pairs.
39mm: 1986-2022 Sportster, 1987-2000 FXR and 1992-2005 Dyna
41mm: 1977-1980 FL models, 1980-1985 FXWG, 1981-2013 Touring, 1984-2017 FLS, FLSS, FLST, FLSTC, FLSTF, FLSTN, FXST, FXSTB, FXSTC & FXSTD Softail and 1992-2005 Dyna Wide Glide
49mm: 2002-2017 V-Rod, 2006-2017 Dyna, 2014 to present Touring, 2013-2017 FXSB & FXSBSE Softail Breakout, 2018-2020 FLDE Deluxe, 2018 to present FLFB & FLFBS Fat Boy, 2018 to present FLHC & FLHCS Heritage Classic, 2018-2020 FLSL Slim, 2018 to present FXBB & FXBBS Street Bob, 2018 to present FXBR & FXBRS Breakout, 2018-2020 FXLR Low Rider and 2020 to present FXST Standard