Fizik Antares R1 7x9 Braided Rail Saddle: LargeAntares is designed for Chameleon style riders who have a medium spine. Riding involves easy transitions from standing or sitting. R1 uses a carbon injected nylon twin flex body for lighter weight Carbon Braided Rails 7x9 Gender Age: Adult Color: Black Width: 152 Rail Material: Carbon Clamp Style: 7x9 Carbon Rails Material: Synthetic Length: 275 Saddle Cut Out: No Defined Color: Black Weight: 160