Featuring the same design and technical specifications as the adult frame the Sierra 18 has everything you'd expect from a modern frame

4140 heat treated steel front hub guard for the Javelin hub

with very strong pins and plates

precision sealed bearings and 7075 hardware spinning on a 14mm hollow female axle with extralong bolts for durability

Included are anti rotation pins and 14mm to 3/8” reduction spacers

Box Two Quick Release Race Seat Clamp bc-mounts-1 Featuring the same design andBox Two Quick Release Seat Clamps are cold forged and CNC machined from 6061 T6 aluminium alloy. The head of the quick release lever and the face of the clamp are given a proprietary low friction surface treatment that ensures smooth lever action for the life of the clamp, without the need for a bushing. Meets or exceeds ENM standards. ###section### Product Specs SIZE: 31. 8mm WEIGHT: 0. 06lbs (27g)