Fly have adapted their Sergio Layos frame to better suit younger riders,  the Sierra is an exact replica of that frame that now perfectly fits riders between 7 to 11 years old. The Sierra utilises 4130 Cr Mo alloythroughout the frame with Japanese Sanko Triple Butted tubing,  CNC machined & heat treated headtube & bottom bracket with invest cast dropouts,  seatclamp & seatstays. It's built tough for those riders progressing past more inexpensive frames. Featuring the same design & technical specifications as the adult frame the Sierra 18 has everything you'd expect from a modern frame. section Product Specs 
 Material: 4130 Chromoly HEAD TUBE ANGLE: 75° SEAT TUBE ANGLE: 71° CHAIN STAY LENGTH: 12.2" BB 
 Height: 10.5" WHEEL 
 Size: 18" STANDOVER 
 Height: 8" DROPOUT 
 Size: 14mm HEADSET TYPE:  Integrated BB TYPE:  Euro BRAKE MOUNTS:  Removable (Sold separately) GYRO TABS:  None WEIGHT: 4.3lbs section Product Highlights Geometry specially designed for smaller riders Great all round frame for all types of riding High-quality Chromoly construction Seamless Japanese Sanko Tubing Built in chain tensioners shogun-image-section                                             
