The singletrack slaying fatbike.

The Front Range of ColoRADo snowshoe traffic transforms the same uber technical and mountainous terrain we ride in the summer into wild and well packed singletrack. We developed the REEBdonkadonk Fatbike to rip the climbs and descents of two foot wide snowshoe packed singletrack with the same aggressive riding as our hardtail mountain bikes.

The REEBdonkadonk features the big time (26” x 4.5” or 27.5” x 4”) tire clearance and shorter chainstays (20mm shorter) with sliding dropouts to tuck the rear wheel where it best fits those big meaty tires. The beefy 44mm headtube and 1 3/4“ downtube are paired with a 67 degree HT angle and 31.6mm seat tube was shortened to fit modern dropper seatposts in increase standover.

Letting it all hang out on the ragged edge with less consequences of falling into deep snow translates to faster descending times and bigger smiles on winter singletrack than summer on our technical terrain. Seeing your backyard trails in a totally different way (and often at night) and wrecking your buddy in the snow makes the imperial stout and whiskey warmer taste that much better.  Twist up a fatty and light it up!

Pinion Gearbox, Rohloff, and other custom options available. Each and every Gates Carbon Drive compatible frame is Barn Built, hand cut, hand welded, and hand powder coated in-house in Lyons, CO. Email for details.

#REEBdonkadonk  #Fatbike

Frame lead time is currently 8-10 weeks.  Complete bike lead time up to 26 weeks.


  • Updated Geometry for 2020 makes the new REEBdonkadonk even more fun in the steeps!
  • Air Hardening, Seamless, Heat Treated Steel, Handwelded in USA
  • 44mm ID head tube, compatible with 1-1/8” straight or 1.5″ tapered steerers
  • 31.6mm ø seat post
  • Internal dropper post routing
  • 12x177mm Rear through axle, 12x197mm available as a custom request
  • Tire clearance:
    • 177mm: 26×4.5” or 27.5×4″
    • Clearance for larger tires like the VeeRubber Snowshoe 2XL 5.1″ tire is available with a our custom 197mm rear spaced bike, Email for details!
  • 100mm English (BSA) threaded Bottom Bracket shell
  • Paragon Machine Works sliding dropouts with replaceable/customizable inserts (run it SS or geared)
  • Designed around the RockShox Bluto, 120mm
  • Custom Powder Coat colors available at +$350 (Zinc Primer) – Email to add this option to your order
  • Pinion Gearbox, Rohloff, and other custom options available.  Email for details!
FRAMEAir Hardening, Seamless, Heat Treated Steel, Handwelded in USAAir Hardening, Seamless, Heat Treated Steel, Handwelded in USA
FORKRockshox Bluto RCT3, 120mm travelRockshox Bluto RCT3, 120mm travel
HEADSETCane Creek 40Cane Creek Hellbender 70
HEADSET SPACERSAlloy - BlackAlloy - Black
STEMSpank Spoon, 40mmI9 A35
HANDLEBARSpank Spoon RiserRaceFace Atlas 35 Riser
GRIPSSpank Spoon Lock-OnRaceFace Half Nelson Lock-On
BRAKESShimano M7100 SLX discShimano M8100 XT disc
ROTORSShimano RT66 180mm F / 160mm RShimano RT66 180mm F / 160mm R
SEATPOSTKS Rage-i Dropper w/Southpaw Under Bar RemoteKS Rage-i Dropper w/Southpaw Under Bar Remote
SADDLEWTB RocketChromag Trailmaster DT
WHEELSETSurly My Other Brother Darryl, DT Swiss Comp spokes (handbuilt by REEB)Surly My Other Brother Darryl, DT Swiss Comp spokes (handbuilt by REEB)
HUBSHope Pro4 FatsnoHope Pro4 Fatsno
TIRESSurly Bud (front), Surly Edna (rear) 120tpiSurly Bud (front), Surly Edna (rear) 120tpi
RIM STRIPSurly TubelessSurly Tubeless
REAR AXLE12x177mm12x177mm
CASSETTESRAM NX Eagle, PG-1230 11-50, 12 spdSRAM GX Eagle, XG-1275, 10-50 12-spd
DERAILLEURSRAM NX Eagle, 12 spdSRAM GX Eagle, 12 spd
CHAINRINGSRAM 30t X-Sync 2 Direct Mount, SteelSRAM 30t X-Sync 2 Direct Mount, Steel
SHIFTERSRAM NX Eagle Trigger, 12 spdSRAM GX Eagle Trigger, 12 spd
CHAINSRAM NX Eagle, 12 spdSRAM GX Eagle, 12 spd

Generic Geometry Chart

All measurements valid w/ 100mm travel RockShox Bluto fork; 511mm A-C, 51mm offset.
Changes in fork will result in changes to certain aspects of the geometry.

 SmallMediumLargeExtra Large
A. SEAT TUBE345mm (13.6")390mm (15.4")425mm (16.7")460mm (18.1")
B. EFFECTIVE TOP TUBE572mm (22.5")600mm (23.5")624mm (24.5")648mm (25.5")
C. REACH395mm (15.6")415mm (16.3")430mm (16.9")445mm (17.6")
D. STACK598mm (23.5")607mm (23.9")616mm (24.3")625mm (24.6")
E. SEAT TUBE ANGLE73.5°73.0°72.5°72°
F. HEAD TUBE ANGLE67.0°67.0°67.0°67.0°
G. CHAIN STAY445mm (17.5")445mm (17.5")445mm (17.5")445mm (17.5")
H. HEAD TUBE90mm (3.5")100mm (3.9")110mm (4.3")120mm (4.7")
I. AXLE TO CROWN511mm511mm511mm511mm
J. OFFSET51mm51mm51mm51mm
K. WHEELBASE1126mm (44.3")1151mm (45.3")1169mm (46.0")1188mm (46.8")
L. BB DROP56mm (2.2")56mm (2.2")56mm (2.2")56mm (2.2")
M. STANDOVER756mm (29.8")789mm (31.1")812mm (32.0")831mm (32.7")



Stealth Charcoal