El Oso Tres

star(s) from 1 reviews.

Availability: In stock

Our premier fat bike is fully equipped for any adventure.
  • Free Same-Day Shipping
  • Free Assembly and Pick Up
  • Hassle Free Returns

El Oso Tres

* Required Fields


We designed the Diamondback el Oso Tres to be capable of any adventure you point it at. Of course, you might argue that a fat bike with suspension fork is overkill, what with the high-volume/low-pressure Maxxis Minion FBF/FBR 26x4.0-inch tires already soaking up rocks and gripping Mother Earth like they were slathered in glue.

Then again, we built this bike with the most remote and technical trails in mind. When you’re days away from the nearest trailhead, a burly, winter-tested fork plus a reliable parts package all come in real handy. The KS E30i dropper seatpost improves maneuverability on dicey downhills. Thru-axles front and rear add stiffness for enhanced steering precision. Overkill? Heck. Yeah. Bring on the overkill. Bring on the adventure.

Frame El Oso 6061-T6 Double Butted Aluminum, Formed Top and Down Tube, 1.5" Tapered Machined Headtube, 197mm Thru Axle, Fits up to 26x5" Tire
Fork Manitou Mastadon Comp, 100mm, 34mm Stanchion, 3 Position Compression Adjust, VTT Cartidge, 150x15mm Hex-Lock Thru-axle, 1.5" Taper Steerer
Headset FSA No.57, Sealed Cartridge
Cranks Raceface Æffect, 28T Direct Mount Narrow Wide
Bottom Bracket Raceface Outboard Bearing
Rear Derailleur Shimano XT M8000 Shadow Plus, 11 Speed, GS
Shifter Shimano XT M8000 Shadow Plus, 11 Speed
Cogset Shimano XT M8000, 11 Speed, 11-46T
Chain KMC X11 EPT Anti-Rust, 11 Speed
Front Hub Sun Ringle, 32h Alloy, Sealed Cartridge Bearing, 150mmx15mm Thru-axle
Rear Hub Sun Ringle, 32h Alloy, Sealed Cartridge Bearing, 197mmx12mm Thru-axle, Cassette
Spokes 14g Stainless Steel
Rims Sun Ringle Mulefüt SL 80mm
Tires Maxxis Minion FBF 26x4.0" EXO, TLR, Folding / Maxxis Minion FBR 26x4.0" EXO, TLR, Folding, 120tpi
Brakes Shimano SLX M7000, w/180mm Front /180mm Rear Rotors
Brake Levers Shimano SLX M7000
Pedals DB CNC Platform, Sealed Cartidge Bearing w/Replaceable Pins
Handlebar DB35 Alloy, 760mm Wide, 15mm Rise, 35mm Bar Bore
Grips DB4L 135mm Lock On
Stem DB35 Alloy, 60mm Reach, 35mm Bar Bore
Seat WTB Volt Race
Seatpost KS E30i Dropper, SM = 125mm, MD/LG/XL = 150mm w/Southpaw Remote
Extras Tool Kit, Carbon Paste
Bike Size SM/16 Rider Height: 5'4" - 5'7" MD/18 Rider Height: 5'7" - 5'10" LG/20 Rider Height: 5'10" - 6'1"
Seat Tube Length 400.0mm 450.0mm 500.0mm
Stand Over Height 730.0mm 768.0mm 796.0mm
Top Tube Length 581.0mm 610.0mm 630.0mm
Stack 590.0mm 605.0mm 605.0mm
Reach 410.0mm 436.0mm 456.0mm
Head Tube Length 110.0mm 120.0mm 120.0mm
Head Angle 68.0° 68.0° 68.0°
Seat Angle 74.0° 74.0° 74.0°
Wheel Base 1129.0mm 1159.0mm 1178.0mm
Chain Stay Length 450.0mm 450.0mm 450.0mm
Fork Offset 50.0mm 50.0mm 50.0mm
BB Drop 60.0mm 60.0mm 60.0mm
Stem Length 60.0mm 60.0mm 70.0mm
Handlebar Width 750.0mm 750.0mm 750.0mm
Crank Length 170.0mm 175.0mm 175.0mm
Seat Post Length 350.0mm 350.0mm 350.0mm

Customer Reviews Write Your Own

You're reviewing: El Oso Tres

How do you rate this product? *

  1 star 2 stars 3 stars 4 stars 5 stars
Overall Quality

First impressions

Review by Hightower
Overall Quality

Not much info out there and being one of the first to buy this new model ill tray and keep this review
updated ( if possible) as I get to know the bike.

Answers to Questions i had had before bike arrived:
-weight:34.6 pounds on bathroom scale
-Fork is the extended version, which is a good thing cause you can fit 5" tires (cant in standard version)
-Tool kit: is simply 3 Hex keys, 4 zip ties, some assembly compound. (will need more tools to complete install)
-no spare derailleur hanger included (Rear Derailleur Hanger - 32-68-060)
-no tubeless stems included
-tires are tubeless ready, but rims will need to be taped

-No assembly instructions: not completely necessary but would have been nice for the dropper post install
(start at pg 13 http://www.kssuspension.com/wp-content/uploads/2017/02/Integra-models-all-languages-2017.pdf)

-for assembly, your will need a full set of hey keys 2,2.5,3,4,5,6 , cable cutters, shock pump, torque wrench.

Bike build and welds all look great, rear dropouts defiantly overbuild with alot of meat to them, may be a good thing for longevity?
Dropper post lever is the budget version of the southpaw (southpaw P)

(Posted on 5/30/2019)