TC Bros. Fork Tube Kit for Harley-Davidson 49mm (Late Dyna)TC Bros. Fork Tube Kit for Harley Davidson 49mm Forks If youre rebuilding a fork and found the tubes damaged, you may need replacements. And if youre building a chopper, you may require a longer fork. In either scenario, these TC Bros. kits will help you refresh a factory length fork or convert your OE front end into a custom length fork suitable for choppers with additional frame rake. This fork tube kit contains the items you need to extend