Manitou Mastodon Pro EXT (Extended) Fat Fork
Special version to allow 80-150 mm travel with maximum tyre size (26 x 5.25")
Can be configured for 80-170mm with smaller tyres (26x4.5).
Ideal for Foes Mutz Full Suspension Fat Bike
15 x 150 mm Hexlock SL axle
Dorado Air spring system
IVA air volume spacer system
MC² Damper with HSC, LSC and rebound adjustable
1.5" Taper Steerer (also available with 1 1/8" straight steerer here)
180 mm Disc Brake Mounts (Post)
Tested to perform at -15°C
2260g with uncut steerer

The Mastodon is a game changer for the Fat Bike market. Engineered for and tested to work in the extreme cold as well as the warm. Strong and stiff 34 mm chassis developed from the Manitou Mattoc provides class leading damping, adjustability and now cold weather performance.

The MC² damper and Dorado Air spring system are proven performers with amazing external adjustability and internal tunability.

Available from Shockcraft or via your local bike shop

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Fork service kit containing fork seal kit, internal seal kit, fork oil, bushing lubricant, Slickoleum assembly grease and oil syringe
Application is Manitou Mastodon Pro forks 2018+. Learn More

Fork service kit containing fork seal kit, internal seal kit, fork oil, bushing lubricant, Slickoleum assembly grease and oil syringe
Application is Manitou Mastodon Comp forks 2018+ Learn More

Replacement Air Cap only Learn More

Replacement Rebound Knob only
Fits Mezzer, Mattoc, Magnum, Mastodon, JUnit 34 mm Pro & Circus Pro 34 mm forks Learn More

Replacement lower leg bushings for Manitou 34 mm forks
Including Mattoc, Magnum (2016-17) & Mastodon

Manitou Part Number: 141-30996-K019 Learn More

Chrome decal pair for Manitou forks
Fits Manitou forks, including Mezzer, Mattoc, Circus, R7, Mattoc Pro

187 mm length

Sold as a pair

Photo of fork shows the new Manitou Mattoc Pro 2023 with chrome decals Learn More

Mastodon Pro EXT 150 mm Rebound Assembly (Manitou)
Longer version of 141-34087-K014
Cartridge rebound damper assembly for Pro level Mastodon.

Manitou Part Code:  141-34087-K016 Learn More

Complete rebuild kit for Manitou Mastodon, Mattoc and Magnum Forks
Includes 34 mm wiper seals, foam rings, damper and air seals and grease.

Manitou Part Code:  HB-141-28528-K008 Learn More

Mastodon casting includes bushing and seals.
Matte Black colour
Axle not included

Manitou Part Number 141-34078-K009

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Tool for pressing wiper seals into 34 mm stanchioned forks Manitou Part Code: 172-31123 Learn More

Replacement rebound knob & air cap for Manitou Mezzer, Mattoc, Mastodon, Magnum, JUnit (34 mm) and Circus Pro forks
Includes rebound knob mounting screw

Manitou Part Code: 141-32155-K016

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Alternative product: 34 mm Fork Seal Kit Low Friction Flangeless (Manitou)

Kit includes 2 high quality Trelleborg Flanged seals, 2 foam rings and Slickoleum grease.
Fits 34 mm stanchioned Manitou forks from 2006 to present.
Flanged type for 44mm pocket.
Special compound for low friction & extreme low temperature performance

These flanged seals have the same fork compatibility as the flangeless option.
Flangeless seals provide a tighter fit into the lower leg (to resist popping out with internal air leaks) which makes them more difficult to install than flanged seals.
A seal press tool is not essential for installation of the flanged seals but it does make the job easier.

Manitou Part Code: 141-34000
Replaces Part Numbers 141-30996-K007 & 83-2969

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31 mm Pro and Expert piston assembly with seal and Slickoleum assembly grease
Replacement air piston for Manitou Mattoc, Magnum (2015-17) & Mastodon forks with Dorado Air spring system (valve underneath by axle)
Upgrade air piston for 2014 Mattoc forks which had the piston with the single white glide-ring
Manitou Part Code: 141-30996-K023

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Additional 10mm travel spacers can be installed under Mastodon bottom-out bumpers to increase tyre (tire) clearance and reduce travel.

121-29113 spacer is smaller diameter used for top-out on Pro and Comp forks.  Bottomout on air side of Pro forks.
121-30396 spacer is used for bottom-out on Comp fork damper side.
121-32318 spacer is used for bottom-out on Pro fork damper side and Comp fork air side.

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Hexlock SL Axle 150 mm
Fits Manitou Mastodon Fat Fork

Manitou Part Code: 141-33147-K004 Learn More

Mastodon Pro Standard 100-15 Air (Manitou)

Manitou Part Code: 141-34087-K007 Learn More

Compression Damper for Mastodon Pro (Manitou)

Manitou Part Code:  HB-141-34087-K014 Learn More

Kit includes 2 high quality flangeless seals, 2 foam rings and Slickoleum grease.
Fits 34 mm stanchioned Manitou forks from 2006 to present.
Flanged type for 44mm pocket.
Special compound for low friction & extreme low temperature performance.

These flangeless seals have the same fork compatibility as the flanged option
Flangeless seals provide a tighter fit into the lower leg (to resist popping out with internal air leaks) which makes them more difficult to install than flanged seals
We recommend the use of a seal press tool for installation to keep flangeles seals straight and set depth correctly.


Manitou Part Code: 141-39022-K020
Replaces Part Numbers 141-34000, 141-30996-K007 & 83-2969 Learn More