Lightweight and strong pumptrack frame Befly AIR two Frame designed by Slovak pumptrack designer Roman Kaločay. A frame with a reach of 420 mm and a short 385 mm chainstay is the perfect combination of what you need to have under your feet at high speeds on the pump track. Of course, the frame can keep you safe in all kinds of dirt, but you will appreciate the extended reach especially on the pump track. TECHNICAL SPECIFICATION Material: AL6061 custom double butted top tube and downtube Head tube: head tube length: 115 mm (44/56) Yoke for increase stiffness Fork: standard neck 1-1/8” or tapered 1.5 1-1/8” Recommended fork lift: 100-110 mm, BB: BB with 73 mm thread (euro bb) Max chainring: 32T Hub: 135x10mm, horizontal lugs, recommended bolt type hub Disc brake: IS-2000 disc brake holder, maximum rotor size: up to 160 mm Derailleur: hanger available separately. ISCG. Seat post: 31.6 mm (insert min. 110 mm) Max tire size: depends on tire type - recommended type: MAXXIS DTH/IKON/Continental speedking/raceking etc. 26 x 2.3" Weight: ~ 2.15 kg