Sergio Layos’ signature Sierra frame from Flybikes has seen a couple of alterations from its predecessor The Sierra now benefits from now comes with a slightly mellower 74.5 degree head tube angle, a lower 11.5” bottom bracket height and an additional 21.3” top tube length option, all while keeping the original features you’ve come to love of Sergio’s frames like gusseted tubing, drilled gyro mounts and removable brake mounts. ###section### Product Specs MATERIAL: 4130 Chromoly HEAD TUBE ANGLE: 74.5° SEAT TUBE ANGLE: 71° CHAIN STAY LENGTH: 13.6\" BB HEIGHT: 11.5\" WHEEL SIZE: 20\" STANDOVER HEIGHT: 8.75\" DROPOUT SIZE: 14mm HEADSET TYPE: Integrated BB TYPE: Mid BRAKE MOUNTS: Removable GYRO TABS: Drilled WEIGHT: 2.370g / 5.22lb ###section### Product Highlights Nuetral Geometry for responsiveness and stabilty Great all round frame for all types of riding Gusseted top and down tubing for added strength Built in chain tensioners to keep your wheel in place Strong invest cast dropouts ###shogun-image-section###