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.