DRCZeta - Universal Fork Seal Driver & Replacement Adapters - D59-26-908 Option:Replacement Adapters (D59-26-908) Ultra-hard surface layer reduces friction

Ultra-hard surface layer reduces friction to prevent power-loss caused by chain drag

Additionally

6mm diameter with a plastic sleeve to protect paintwork

Smoother shifting and improved lever feel

These vents will do just that

DRCZeta - Universal Fork Seal Driver & Replacement Adapters - D59-26-908 Option:Replacement Adapters (D59-26-908) Ultra-hard surface layer reduces frictionFork seal driving tool for small diameter front fork tube. Can be used for front fork tube diameters ranging from 26 mm to 39 mm. Comes with 2 different sized rubber plastic adapters. Can be used for most conventional and up side down front forks. Ergonomic steel body design for less power and accurate operation.