The S&M Big Jumper V2 26 Inch Dirt Jumper Frame is a black metal BMX frame with white logos, designed for 26” setups, shown against a white background.

Close-up view of the rear triangle and bottom bracket area of the S&M Big Jumper V2 26 Inch Dirt Jumper Frame in glossy black, photographed against a white background.

Close-up of the S&M Big Jumper V2 26 Inch Dirt Jumper Frame, highlighting the metallic seat tube, rear triangle, and welded joints against a white background.

Close-up of the S&M Big Jumper V2 26 Inch Dirt Jumper Frame’s metal junction, showing welded joints, seat tube, and disc brake mount against a white background.

Close-up of the S&M Big Jumper V2 26 Inch Dirt Jumper Frame in metallic red, highlighting the seat stays, top tube, and detailed welds near the seat cluster.

Close-up of the S&M Big Jumper V2 26 Inch Dirt Jumper Frame in black with white logos, highlighting the rear triangle and seat tube.

Close-up of the S&M Big Jumper V2 26 Inch Dirt Jumper Frame in dark blue, featuring "S&M BIKES" branding on the chainstays, seatstays, and bottom bracket—designed for use with suspension forks and disc brakes.

Description

The updated second run of the BJ frames come with thoughtful upgrades — an engraved head tube, added tyre clearance, and a T-slot seat tube for smoother, more secure QR clamping.

S&M believe 20” bikes are the original Dirt Jumpers, and giving that moniker to 26” frames blows, but at the end of the day, all that really matters is the ride. The 26” BJ is designed to go fast and high, soak up bumps and brake better than its smaller counterparts. And unlike a smaller-rigid bike, a 26” bike with a suspension fork and disc brake not only roasts transitions almost effortlessly, it leaves riders in better condition to have just as much fun the next day.

Features

26" wheels, built to go big. Designed to carry speed and height, soak up bumps and brake better than a smaller bike, so you can back it up the next day.
Suspension fork geometry. Angles are based around a 100 to 120mm suspension fork or the rigid equivalent, with a 69° head angle and 10" standover.
V2 updates: tyre clearance, T-slot. The second run adds room for bigger rubber, a T-slot seat tube for smoother QR clamping and an engraved head tube.
160mm disc brake mount. Comes set up for a 160mm disc using a 0mm IS to post mount adaptor, so stopping power matches the speed.
135mm dropouts with tensioners. A 3/8" slot, 135mm spacing and integrated tensioners hold the rear wheel straight and the chain tight after every session.

Specifications

Sizes: 22.0" or 23.5" top tube
Chainstay: 15.1" slammed
Head tube angle: 69°
Seat tube angle: 73°
Standover: 10"
Bottom bracket height: 12.6" (.400" drop)
Bottom bracket: 73mm Euro
Dropouts: 3/8" slot, 135mm spacing, integrated tensioners
Brake mounts: 160mm disc with 0mm IS to post mount adaptor
Head tube: 120mm tall, integrated 42/52 style, accepts 1.5" tapered steerer, engraved
Seat tube: 27.2mm post, T-slot
Seat clamp: 30mm
Tyre clearance: 26" x 2.25" slammed, 2.35" pulled back a bit
Wheel size: 26"
Weight: 2.8 kg (22" top tube)
Note: Geometry based on a 100 to 120mm suspension fork or equivalent rigid fork. Max sprocket 30T on standard chain line, 32T with additional spacers