Call Us: 01782 747782
Free UK Shipping Over £50 & Easy Returns




Free UK standard shipping on orders over £50
The Mastodon is not a modified or repurposed trail fork compatible with large tyre dimensions, but rather it is a fat bike fork made to improve any ride regardless of how low or high the numbers on the thermometer read. Creating such a dynamic fork required all-environment and all-temperature performance testing that took the R+D staff to some of the most inhospitable testing environments in the world. To earn its place within the Manitou family, the Mastodon passed performance and reliability testing in both real-world and lab scenarios at temperatures as low as -40 degrees. The Dorado Air, seals, lubricants, and all other internals are proven for all-weather performance, no matter how extreme on either end of the temperature spectrum.
Like all Pro level suspension, the Mastodon utilises the Dorado air spring that first debuted in our iconic Dorado model. The newest version of the mastodon incorporates the VTT6 damper for a simplified and more intuitive adjustment. The VTT6’s single knob adjusts both high and low-speed characteristics. The resulting wide tuning range allows riders to easily find the perfect set-up for any terrain. These technologies, along with IVA volume adjustment allow for fine-tuning of the air spring curve that adapts to an extremely wide variety of conditions, riding styles and personal preferences.
106g of weight savings from the previous model with new crown, legs and internals.
DoradoTM air allows for internal travel adjustments with no added parts. New travel spacers account for negative air volume change, so the 80mm fork has the same initial stroke feel as the 160mm.
Expert Air spring systems contain a unique balancing valve that equalizes the positive and negative air chambers during the air fill process. This gives the spring rate a consistent feel without any flat or dead spots in the stroke, along with giving riders of different weights the same initial stroke feel. Dorado Air is our lightest weight air spring technology.
Incremental Volume Adjust (IVA) modifies the volume in the positive air chamber with self contained spacers dictating the position of the IVA piston. This allows the main air spring ramp-up to be tuned to the rider weight, style and conditions without the need for additional parts.
A single external compression adjuster that simultaneously adjusts HS and LS damping characteristics. It features a fixed shim stack and a secondary shim stack that is preloaded by the external adjuster. The resulting wide tuning range combines the benefits of a Low-speed platform and High-speed progressive tune can suit any terrain.
New crown is 84g lighter, with increased knob clearance. 44mm offset to match modern fatbike geometry for precise handling and increased traction.
Front brake routing allows the user to use the same length brake hose from their rigid fork, or other suspension fork. New arch ribs for increased casting stiffness.
Tyre diameter clearance is 2mm shorter than the current EXT model, with a 6mm reduction of axle to crown. 796mm satisfies every fat bike tyre on the market!
Stock Status Instock - Instore - Item Usually shipped or available for shop collection, within 48 hours (Mon-Fri)
Instock - Supplier Warehouse - Item is held in Suppliers Warehouse, Depending on the the supplier transfer time can vary from 24 Hours to 14 Days for item held in European warehouse.
(over festive periods some suppliers shut from 24th Dec-2nd Jan so orders can be delayed through this period.)
Brands held in European website include Trek, Bontrager, Electra, Wahoo, Rapha. For up-to-date transfer times please call customer services on +44 (0)1782 768622
Most out products are shipped by FedEx, providing unprecedented reliability and speed. Lightweight Spares below £25.00 value have a Royal Mail postage option, which is sent via Tracked 48 service. - £2.99
Shipping on all Domestic Orders over £50.00 (excluding bikes and home trainers) for delivery within the UK is completely FREE!
Bike and Home Trainers and oversize Goods £15.00 - FedEx
White Glove Bike Delivery - our white glove option has your bike personally delivered to you by a fully trained Mechanic and Bike fitter - £99.99
(Certain bikes will only have this option such as Cargo Bikes)
To Qualify for FREE Shipping:
In some cases, we may ship items out with another courier, depending on the status and availability of items ordered. (Customers will not be charged more and will be refunded any unused postage cost) If part of an order is cancelled and the total drops below the £50.00 free postage, a postage charge may be taken.
Delivery costs will be clearly stated on the checkout page, though you will need to register (to provide your delivery address) in order to see the delivery costs.
If you have any questions about delivery charges, times or none delivery please do not hesitate to get in touch by email:store@swinnertoncycles.co.uk or by telephone on +44 (0)1782 768622. Handling is normally 48 hours, but at busy periods this may be extended but we will endeavor to process your order within 5 working days. Please bear in mind in some cases orders can take longer to process, please contact us for more details.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

