Manitou | Mastodon Pro - Extended / 100mm
Manitou | Mastodon Pro -
Manitou | Mastodon Pro -
Manitou | Mastodon Pro -
Manitou | Mastodon Pro -
Manitou | Mastodon Pro -

Mastodon Pro


Regular price $949.99 Sale price$522.49 Save $427.50
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Need help finding the right fork? Check out our Fork Fitment Guide


Mastodon is the real-world trail suspension for fatbikes. This fatbike fork delivers all-temperature performance, working equally well in winter or summer, soaking up chatter and big hits. Extended ride height versions fit up to 26×5.15” / 27.5×4.5” tires. Standard ride height versions fit up to 26×4” / 27.5×3.8” tires on the snow, or taking on shimmering hot sand like a pro. All-temperature performance born of frigid winter ride-testing. 34mm trail chassis is stiffer and steers more precisely than any other fatbike suspension fork.

    •100mm and 120mm forks are both internally adjustable in 10mm increments from 100-140mm of travel.
    •Dorado Air Spring
    •MC2 Compression Damping
    •TPC Rebound Damping
    •26", 27.5"

    •Wheel Size: 26/27.5"
    •Weight: 2152g (Standard) 2172g (Extended)
    •Offset: 51mm
    •Ride Height: 511-561mm (Standard) 531-571mm (Extended)
    •Travel: 100-150mm internally adjustable in 10mm increments (Standard) 100-140mm (Extended)
    •Spring: Dorado Air w/ IVA
    •Compression Damping: MC2
    •Rebound Damping: Half Cartridge Adjustable TPC
    •Adjustments: Air, Air Volume, Rebound, LS and HS compression
    •Steerer: 1.5" Tapered
    •Crown: Forged Aluminum, Deep Bore Hollow
    •Leg Diameter: 34mm
    •Leg Material: 7000 - Series Butted Aluminum
    •Brake Post Mount: 180mm (203mm Max)
    •Axle :15mmx 150mm Hexlock SL
    •Max Tire Size: 26x4" / 27.5x3.8" (Standard)26x5.15" / 27.5x4.5" (Extended)
    •E-Pac: Yes

    Customer Reviews

    Based on 12 reviews
    Excellent addition to my Fatty

    The Mastodon was delivered quickly and in new condition at a great price. Although it is somewhat heavier than the carbon fork it replaces (duh) I have arthritis in my shoulders so the cushioning effect is wonderful. It makes a real difference descending down even moderately rough terrain. It allows much greater control descending or ascending over rough stuff. I still need to work on adjusting it properly but I think I am close. I installed it myself and needed to buy some tools and make one (pipe cutter, star nut seater, and PVC pipe tool to seat the crown race) and after some stress I was able to install it without too much difficulty. All in all well worth the price.


    Loving the squish on the fat tire bike!
    Very happy customer

    Great bike made Greater!!

    I recently purchased a full suspension fat tire ebike, this bike came, fully loaded with outstanding components, with one exception the front suspension fork, with some in-depth research, There was only one choice to make the Manitou Mastodon! The ebike deserved an upgrade to reach its full potential!
    My first ride with the Mastodon was telling, an 8 inch drop off was taken so smoothly, as compared to the former KKE shock which bounced! What a difference, this ebike has now been upgraded to its full potential! Highly recommend the Mastodon Pro Ext! Get the best available Shock on the market!

    Make your fat bike a monster truck

    It transformed by bike into a four-season machine. The new low profile compression damping knob lets the crown clear my 2022 Farley 9.6 frame, so I didn't need to add Trek's rubber bumper. Appears to be very well made too.


    Every fat tire bike needs this fork! I installed one on my Specialized Fat Boy Expert and it completely changed the bike. The fun factor is through the roof and it is now my favorite bike to ride. I also have an Epic and Stumpy which both serve a purpose but their not as fun as the FB. My only disappointment is not getting the snow camo model that would look sic with my white frame.

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