The Prodigy IHC forks are pulled right off the Envy Prodigy, our best selling scooter for 8 years running. The Prodigy forks feature IHC compression and are available in 5 of the best looking color ways that you have ever seen on a pro scooter fork. Make sure your bars are compatible with IHC compression when you pick up the Prodigy IHC forks. Envy PRO SCOOTER FORKS are an aluminum pro scooter fork that work with the following types of compression: IHC. Prodigy forks are IHC forks so the compression is built directly into the forks. A compression bolt on top of the forks compresses a shim onto the headset, eliminating the need to purchase external compression. Since you do not have to purchase compression AND forks when you buy IHC forks, IHC compression is an affordable and very popular compression system. Envy Prodigy forks are durable forks and can be ridden on the street or at the park. The Envy pro scooter forks are compatible with the following wheel diameters: 100mm,110mm,115mm,120mm,125mm. Envy pro scooter forks are compatible with wheels with a 24mm core and either a 24mm or 26mm wide PU.