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27.5-Inch Plus Wheel

$1,849.00
The Karate Monkey features updated, progressive trail geometry, our custom trumpet tubeset, and Surly's Gnot-Boost rear dropout system. Available in a variety of colors, with multiple drivetrain and wheel size configurations.
- 100% Surly Chromoly steel frame and fork; double-butted main triangle and 44mm headtube
- The tubeset uses the same trumpet tubes found on Instigator 2.0 frame
- Adjustable rear dropouts with 145mm Gnot-Boost spacing. Works with 142, 148 12mm thru, as well as 135mm w/ 10/12 washer
- Internal dropper seatpost routing with 30.9mm seat tube ID
- Clearance for 29 x 2.55" or 27.5 x 3" tires

$839.99
$1,199.99
30% Off
Roscoe 6 is the ideal gateway to mountain biking for new riders looking to have a fun time on the trail. It has plus-sized tires that inspire confidence by keeping you stable, a suspension fork that soaks up the big bumps and roots, an easy-to-use 1x drivetrain, and playful frame geometry that makes it easier to control your bike on technical trails and winding singletrack.
It's right for you if...
- You know there are good times to be had on the trail, and you want to be part of them! You're looking for an easy entry to the sport of mountain biking on a bike that will keep you excited and motivated to get out there day after day.
The tech you get
- A strong aluminum frame, confidence-inspiring 27.5+ wheels with wide, grippy tires, and an SR Suntour fork with 120mm of travel. It has a trail-tough Shimano drivetrain with 10 speeds and a wide range of gears for climbing, hydraulic disc brakes, and a dropper post for extra room on rough trails.
The final word
- Roscoe 6 is like the friend who takes you mountain biking for the first time and never gets frustrated while they're teaching you how to ride. It's all about getting out there, having fun, and enjoying the great sport of trail riding!
Why you'll love it
- It's more fun to be a better rider: Roscoe is so stable and forgiving, it's like an instant ability upgrade
- Even when the trail gets rough, the wide 27.5+ tires deliver more confidence, traction, and stability
- The dropper post lets you lower your saddle on the fly so it's out of the way on descents
- It has rack mounts so you can use it for bikepacking or even running errands
Features:
Built for fun
- Roscoe is a confidence-inspiring trail hardtail with stable handling, robust parts, and a longer-travel fork that gives you more control over bigger hits. Built to party with 1x drivetrains and dropper posts, these models are perfect for anyone who values fun over fast.
High tech frame
- The Alpha Gold Aluminum frame is packed with features that make your ride better. A tapered head tube gives you more precise, confident handling on the front end, while Boost 141 rear hub spacing gives you shorter chainstays for more nimble handling out back.
27.5 Plus traction
- Better traction gives you more confidence. Roscoe's extra-wide 27.5 Plus tires give you more grip and overall stability so you can roll over anything with confidence.

$799.99
$1,299.99
38% Off
Bike scratched see photos.
COVID-19
COVID-related supply issues have caused some bike specifications to differ from what is listed. Please check with your local SE dealer for the most up to date specifications on the bikes they have in their stores.
About
To celebrate the life and times of SE’s founder, Scot Breithaupt, and SE’s motto of “BMX Innovations,” we created a bike like you’ve never seen before. The 27.5+ OM-Duro takes its design cues and aesthetics from the legendary OM Flyer and mixes in some radical mountain bike-style upgrades. This wildly unique bike comes in standard and XL sizes and features big 27.5 x 3.0” tires, a SRAM GX 1x10 drivetrain, Tektro Auriga disc brakes front and rear, a new external bottom bracket, and internal cable routing for a dropper seatpost. BMX meets mountain bike; there are no boundaries.
Key Features
Cr-Mo OM-Duro frame with looptail rear end, Euro 73mm bottom bracket, 148mm dropout spacing, internal cable routing for dropper post, fixed dropouts and removable derailleur hanger
Full Cr-Mo Landing Gear forks with 110mm-spaced dropouts
27.5” x 3.0” Vee Tire Co x SE Racing T-Fatty tires
CNC alloy narrow/wide sprocket
SRAM GX 1x10 derailleur, 10-speed 11-36T cassette
SRAM GX 1x10, Trigger Shifter with exact actuation
Tektro Auriga disc brakes with dual piston & automatic caliper positioning
SE Flyer seat with bottle opener
External bottom bracket
SER padset
38 pounds / 38.1 pounds for XL
SPECIFICATIONS
COLOR(S) Black Sparkle
FRAME Available in Standard & XL Sizes, 100% Cr-Mo Tubing, Looptail Rear End, 73mm Euro Bottom Bracket, 148mm Spaced Fixed Dropouts, Internal Cable Routing for Dropper Post, Disc brake Tabs, Vertical Dropouts, Removable Derailleur Hanger
FORK Landing Gear, Full Cr-Mo, Disc Tabs, 450mm Axle to Crown, 38mm Offset, 110mm Spaced Dropouts
CRANKSET SE V-Ridge 3-pc Cr-Mo, Cranks, 175mm, External Sealed Bearing Euro Bottom Bracket, 160mm Spindle Length, 19mm Spindle Diameter, 32T CNC Alloy Narrow/Wide Sprocket
PEDALS X-Pedo Low-profile Platform w/ Removable Pins
REAR DERAILLEUR SRAM GX 1x10, Short Cage
SHIFTERS SRAM GX 1x10, Trigger Shifter, Exact Actuation, Alloy Lever
CASSETTE Shimano Deore CS-HG50, 10-speed, 11-36T
CHAIN KMC X10EL
WHEELSET Alloy 36H Nutted Hubs, Sealed Rear, 110mm Front Hub & 148mm Rear Hub, w/ 42mm Double-Wall Disc Rims, 11-36T 10-speed Cassette, Stainless Spokes
TIRES Vee Tire Co x SE Racing T-Fatty, 27.5" x 3.0" Front & Rear
BRAKESET Tektro Auriga, Hydraulic Disc, Easy to Adjust Open System, Dual Piston, Automatic Caliper Positioning, 160mm Rotors
HEADSET Tange 1-1/8" Threadless
HANDLEBAR Big Honkin' Cr-Mo Cruiser Bar, 31" x 6", 10° Backsweep, 1° Upsweep
STEM Retro Alloy Top-Load w/ Engraved SE Logo & Lightweight Cutouts, 55mm Reach
GRIPS SE Racing Flangeless Mushroom Wing Grips w/ SE Rubber End Plugs
SEAT SE Flyer Seat w/ Custom SE Bottle Opener Brace
SEATPOST Micro-Adjust Alloy, 30.9mm
SEAT CLAMP Alloy, 34.9mm Inner Diameter
ACCESSORIES Vintage Vinyl SER Padset, Alloy Valve Caps, Water Bottle Mounts
WEIGHT 38 lbs / 17.23 kgs
*Specifications subject to change without notice
GEOMETRY
A TOP TUBE, ACTUAL 22.3"
TOP TUBE, EFFECTIVE 23.2"
B SEAT TUBE, CENTER TO TOP 16.1"
C SEAT TUBE ANGLE 73°
D HEAD TUBE ANGLE 71°
E CHAINSTAY LENGTH 17.5"
F WHEELBASE 42.3"
G BOTTOM BRACKET HEIGHT 12.4"
H STANDOVER 30.5"
SUGGESTED RIDER SIZE 5'3"+ (160cm+)
STEM 55mm
HANDLEBAR WIDTH 31"
CRANK 175mm
WHEEL SIZE 27.5"
SEAT POST DIAMETER 30.9mm
OM Duro XL
A TOP TUBE, ACTUAL 23.2"
TOP TUBE, EFFECTIVE 24.2"
B SEAT TUBE, CENTER TO TOP 17.5"
C SEAT TUBE ANGLE 73°
D HEAD TUBE ANGLE 71°
E CHAINSTAY LENGTH 17.5"
F WHEELBASE 43.3"
G BOTTOM BRACKET HEIGHT 12.4"
H STANDOVER 31.7"
SUGGESTED RIDER SIZE Suggested Rider Size
STEM 55mm
HANDLEBAR WIDTH 31"
CRANK 175mm
WHEEL SIZE 27.5"
SEAT POST DIAMETER 30.9mm
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