Manitou Dorado is reincarnated as 37mm carbon chassis inverted dual-crown fork

0 15

The Manitou Dorado downhill fork is back. It takes on the classic inverted form we’ve seen on iterations past, filled out into a beefier and stiffer 37mm chassis. A redesigned twin-position cartridge offers position-dependent damping, while the travel-adjustable Dorado Air Spring means you could, in theory, turn this supple inverted downhill fork into a dual-crown enduro fork. Here’s everything you need to know.

Manitou Dorado

manitou dorado inverted dh fork

The new Manitou Dorado is available in Pro, Expert, and Comp models giving riders options for damper cartridge, chassis material, and spring type, with two different crown offsets optimized around 27.5″ and 29″ wheels. The biggest change for this classic upside down fork is the upgrade from a 36mm to a 37mm chassis. 

Why? For added stiffness, of course.

manitou dorado carbon dh fork 37mm stanchions
The Manitou Dorado Pro weighs a claimed 2970g, shaving 238g off the alloy chassis on the Expert and Comp models

While inverted fork designs are generally stiffer than a traditional upright fork in the fore-aft plane, they have, historically, received criticism for their relative lack of torsional stiffness. Across the mountain bike media, the latter has been described as both a good thing and a bad thing, with reviews describing reduced rider fatigue as a result of the increased flex in this plane, and a lack of steering precision as a result of the very same thing.

The jury is still out on the “Upside Down” design, with a number of manufacturers such as Intend and Wren stating that the benefits they offer far outweigh any apparent drawbacks. Manitou themselves are promoting the benefits of the reduced unsprung weight and the smooth and consistent brought about by the constant lubrication of the bushings and seals. This is discussed at length in our feature article on inverted forks which you can find here.

manitou dorado pro carbon inverted dh fork
The new Dorado is available with a a 47OS flat upper crown for 25.5″ wheels or a 57OS drop upper crown for 292 wheels (though these are interchangeable)

Nevertheless, Manitou saw fit to increase the stiffness of the Dorado, addressing the alleged issues around the lack of torsional stiffness. On the Pro model with its carbon chassis, stiffness has increased 27% in the fore-aft plane as compared to the previous 36mm stanchion Dorado. Crucially, the torsional stiffness has also been improved by 22%.

manitou dorado expert inverted dual crown mtb fork
Only the alloy chassis of the Expert and Comp models is eBike certified

The Expert and Comp models with the alloy chassis have also seen a comparable increase in stiffness, with a 20% improvement in both fore-aft and torsional stiffness.

Beyond the bigger, stiffer stanchions, what else is the new for the Dorado?

Dorado TPC+ Twin-Piston Damper

manitou dorado pro tpc+ damper cartridge

The Manitou Dorado sees a damper upgrade in the form of the TPC+ sealed cartridge. That stands for Twin-Piston Cartridge, a design we’ve seen on previous iterations of the Dorado. It basically allows the damping circuitry to be both velocity and position-sensitive, resisting motion in an appropriate fashion depending on how far (and fast) through the travel the fork has been pushed.

manitou dorado compression adjustment tpc+ damper cartridge inverted fork
Don’t be fooled by the colors; this inverted suspension fork has compression adjustment at the bottom of the fork and rebound adjustments on top

Manitou say it maintains light damping through small bumps when the fork is high in its travel. Then, as the fork compresses deeper in the travel the secondary TPC+ circuit engages and increases the damping force for added support and bottom-out prevention. 

manitou dorado tpc+ damper cartridge internals
Manitou Dorado TPC+ Twin-Piston Cartridge internals diagram

That’s not all. Manitou have added another, independent hydraulic bottom out circuit that further increases the damping force in the final 30mm of travel to soften deep travel events. They’ve opted for a spring-backed internal floating piston to seal the damper oil and prevent cavitation (air-oil mixing), rather than the bladder design preferred by other suspension manufacturers such as DVO.

manitou dorado tpc+ damper expert model

While the Dorado Pro gets the TPC+ damper, the aluminium Expert model gets a half-cartridge. We’re waiting to hear back from Manitou as to how exactly this differs from the complete TPC+ seen on the Pro model. What we do know is that the low and high speed compression damping circuits are still independently adjustable of one another.

Dorado Air

manitou dorado airWhile the entry-level Comp model runs a coil spring (more on that later), the Pro and Expert models run an air spring. Dorado Air has an equalizer valve equalizes the positive and negative air chambers during the air fill process. This differs to the mechanism of equalizing employed by FOX and RockShox designs which feature port or dimple system through which air passes from one chamber into the other at a specific point in the fork’s travel.

Manitou say this gives the spring rate a consistent feel without any flat or dead spots in the stroke that (they say) can be a problem with aforementioned dimple systems.

manitou dorado trail side relief bleed valve equalizes outer leg pressure
Trail Side Relief (Bleed Valves) on each leg release pressure built up in the outer legs; this is a red bottom on the Pro model, but a threaded screw on the Expert and Comp models

On the Pro model, Manitou employ an Infinite Rate Tune (IRT) volume adjuster. This basically has a secondary positive air chamber, the pressure of which can be adjusted independently from the main positive air chamber. The benefit of this is that riders can run a lower pressure in the main chamber for good small bump sensitivity in the beginning stroke, but tune the pressure in the secondary positive air chamber to provide their desired level of support and ramp in the mid- to end-stroke.

The Expert model gets a more basic volume adjustment, that Manitou call the Incremental Volume Adjust. We think this simply refers to the fact that you can add or remove volume spacers to adjust bottom-out control, but we’re waiting to hear more on this from Manitou. That said, the IRT from the Pro is available aftermarket so you can add this to the alloy chassis of the Expert model if you want to fine tune the air spring further.

manitou dorado floating axle
The new Manitou Dorado gets a floating axle for perfect lower leg alignment, regardless of the hub

A Dual-Crown Enduro Fork?

Here’s where things get exciting. Riders can adjust the fork’s travel from 203mm down to 190mm or even 180mm travel. It is becoming less and less of a novelty to see 180mm travel forks at the Enduro World Series, and only last week Joe Connell was spotted racing La Thuile with a dual-crown fork from Formula on his Orange Stage 6.

Could the Manitou Dorado become a viable option for enduro racing?

The Coil Dorado

manitou dorado coil comp model

Manitou are keeping the coil spring fans happy with the entry-level Comp model. It gets Manitou’s long-standing ABS+ damper, with low speed compression and rebound adjustments. The spring can be pre-loaded for further tuning, with a range of spring rates offered from 25 lbs/in up to 50 lbs/in in 5 lb increments. 

If you prefer a coil spring but want the benefits of the higher-spec TPC+ damper, fear not. All of the dampers are available aftermarket and are interchangeable across the models.

Pricing & Availability

The Manitou Dorado Pro, Expert and Comp models retail at $1,799 USD, $1,449.99 USD and $1,224.99 USD, respectively. We’re waiting to hear back on the pricing of the aftermarket TPC+ damper and IRT upgrade options.

The Comp and Expert models are available now from Manitou’s Distributor and Dealer network as well as their online store which ships to the USA and Canada. The Pro model won’t be available until early Fall. 

HayesBicycle.com

Leave A Reply

Your email address will not be published.