The Bombtrack Beyond+ frameset is designed as a robust and adaptable base for professional MTB and bikepacking builds.Constructed from 4130 double-butted CrMo steel, it combines strength, reliability, and modern geometry optimized for long-distance and expedition use. With Boost 12×148 mm rear spacing, rack and fender mounts, and stealth dropper-post routing, it’s ready for any setup — from heavy touring loads to technical off-road adventures.Engineered to meet ASTM category 3 standards, the Beyond+ ensures long-term performance and safety under demanding conditions. Technical Specifications Frame Material: 4130 double-butted CrMo steel Frame Standard: Boost 12×148 mm Fork: Not included (compatible with 500 mm axle-to-crown MTB forks) Headset Standard: ZS44 / EC44 (not included) Bottom Bracket: BSA, 73 mm shell width Seatpost: Ø 30.9 mm (dropper-post compatible) Seat Clamp: Bombtrack Origin 34.9 mm Rear Axle: 12×148 mm (included) Mounts: Rack, fender, and bottle cage mounts Brake Mount: IS rear, max. 180 mm rotor Max Chainring (1x): 32T at 52 mm chainline Max Tire Size: up to 29" × 3.0" Weight (frame only): 2910 g (size M, incl. axle & hanger) Max System Weight: 165 kg (incl. rider & luggage) ASTM Classification: Category 3 (MTB / Expedition / Bikepacking) Trailer Compatibility: Approved Seat-Tube Child Seat: Approved