Naturefly 29er Carbon Mountain Bicycle Frame E-Thru 142mm Frame+Seat Post+Seat Clamp+Headset The 29er frame is a member of our Race Concept line, tested and proven by the EN 14781 standard with MTB Racing team. A high-performance carbon hardtail with all the advantages of 29" wheels. Tapered head tube 1-1/8” upper and 1-1/2” lower Integrated headset and NF carbon seat post 31.6 Model: FRM-101 Internal cable routing for derailleur Material: Torayca 700 Carbon Frame : 1200 grams/S Seat Post:  230 grams Color: Red/Black/White Size: 15.5”(XS)/17.5”(S)/19”(M)/21(L) BB: BSA Eng 68 Dropout: E-Thru 142mm Headset: 1-1/8" ~1-1/2