S&M’s Big Jumper isn’t trying to be a mountain bike—it’s what happens when BMX grows a set of 26” wheels and takes the trails head-on. Made in the USA with chromoly tubing and built for speed, suspension, and control, this frame stays true to its roots while letting you hit bigger jumps and rougher lines. Throw on a suspension (or rigid) fork, bolt up a disc brake, and some BMX parts to finish it off and you're ready to roast.
NOTE: Raw and Translucent colors may show small veins or patches of surface rust under the finish. This is normal and does not affect the integrity of the product.
Top your new frame off with fresh bearings. Find a headset here.
Get a new bottom bracket kit here!
| Toptube Size | 22" | 22.5" | 23" | 23.5" |
| Reach | 15.88" (403mm) | 16.47" (418mm) | 17.05" (433mm) | 17.62" (448mm) |
| Stack | 22.07" (560mm) | 22.07" (560mm) | 22.07" (560mm) | 22.07" (560mm) |
| Effective TT | 22.63" (575mm) | 23.21" (590mm) | 23.85" (606mm) | 24.43" (621mm) |
| Seattube Length | 11.56" (294mm) | 11.56" (294mm) | 11.56" (294mm) | 11.56" (294mm) |
| Effective Seattube Angle | 73° | 73° | 73° | 73° |
| Headtube Length | 4.72" (120mm) | 4.72" (120mm) | 4.72" (120mm) | 4.72" (120mm) |
| Headtube Angle | 69° | 69° | 69° | 69° |
| Chainstay Min | 15.1" (374mm) | 15.1" (374mm) | 15.1" (374mm) | 15.1" (374mm) |
| Chainstay Max | 15.7" (399mm) | 15.7" (399mm) | 15.7" (399mm) | 15.7" (399mm) |
| Wheelbase | 41.09" (1044mm) | 41.67" (1058mm) | 42.25" (1073mm) | 42.82" (1088mm) |
| BB Drop | 0.39" (10mm) | 0.39" (10mm) | 0.39" (10mm) | 0.39" (10mm) |
| BB Height (Estimated) | 13" (330mm) | 13" (330mm) | 13" (330mm) | 13" (330mm) |
| Standover | 13.39" (340mm) | 13.39" (340mm) | 13.39" (340mm) | 13.39" (340mm) |
| Axle to Crown | 482mm | 482mm | 482mm | 482mm |
| Fork Offset | 40mm | 40mm | 40mm | 40mm |
Confused by all that geometry? Check out our video below explaining BMX frame geometry and how it affects the feel of a bike.
This product was added to our catalog on April 1, 2025
