Loooong Term Review

2019 Marin Mount Vision 8

Photos Dave Smith

I'm a fan of idiosyncratic design, and outside the box thinking. Bucking convention in the quest to improve the breed. Last year Marin debuted the decidedly unique, if ponderously named, Naild R3ACT-2 Play suspension platform with the Wolf Ridge. The Mount Vision is Marin's latest bike to utilize this design. Are there advantages to this unique bit of engineering? I was curious to find out - let's have a look.


The Mount Vision strikes a silhouette that's decidedly... unique.

What's new with the Mount Vision? I had opportunity to ride the Wolf Ridge a few times (reviewed here by Andrew) and it pedaled surprisingly well for its ample 160mm travel, but I found the rear end deflected more than I liked when pushed hard (and I'm generally not opposed to a bit of lateral compliance). While the new Mount Vision trims travel to a more trailbike-esque 150mm, the relocated shock mount (from down to top tube – with the important addition of a swing link) makes the rear end significantly stiffer laterally than it's longer-legged sibling. It's also much kinder to the shock, as there's considerably less side loading. Said shock migration also frees up front triangle space for a water bottle mount, great news for the pack eschewing crowd (waves hand). Even better - the L & XL frames sport TWO sets of mounts.


The Naild R3ACT — 2 Play platform: all the pivots.


Frame slider tucks into a cozy carbon cradle.


The addition of this little injection molded swing link does wonders for rear end stiffness.


No compression adjustment for you.

Frame Bits & Bobs

The downtube swings quite low to facilitate the suspension slider. If you ride chunky terrain, the frame protector is going to see lots of use – fortunately it's a burly bit of plastic. Casing the frame is typically just a minor annoyance, but after the first time you drop into a steep rock roll and pinging the frame pitches you into a near death experience, you learn to check clearance beforehand. It'd be nice if they could tweak the frame radius a bit to afford tech riders a bit more breathing room. General fit & finish is quite good; nicely refined details throughout, with tidy internal cable routing and a two piece rear fender that keeps the frame slider mud free.


The frame bash plate is thick - which is good, as it gets used frequently.


Said bash guard feels.


STACK (A) 586.6 600 618 630
REACH (B) 432.2 453 471.5 493
HEADTUBE ANGLE (C) 65 65 65 65
HEADTUBE LENGTH (D) 90 105 125 138
SEATTUBE ANGLE (ACTUAL) (E) 62.6 63.1 64.1 64.1
SEATTUBE ANGLE (VIRTUAL) (F) 75.5 75.3 75.1 75
SEATTUBE LENGTH (G) 395 430 465 502
TOPTUBE(ACTUAL) (H) 516 538 563 585
TOPTUBE (EFFECTIVE) (I) 581.2 603 626 650
BOTTOM BRACKET HEIGHT (J) 330 330 330 330
CHAINSTAY (L) 420 420 420 420
WHEELBASE (M) 1160 1187 1213 1240
STANDOVER HEIGHT (N) 716 717 728 749
FORK OFFSET (9 & PRO) (O) 44 44 44 44
FORK OFFSET (8) (O) 46 46 46 46
SEATPOST DIAMETER 30.9 30.9 30.9 30.9
HANDLEBAR WIDTH (9 & PRO) 787 787 787 787
HANDLEBAR WIDTH (8) 780 780 780 780
STEM LENGTH 35 35 35 35
CRANK LENGTH 170 170 170 170


The Mount Vision sports some fairly contemporary numbers. A reasonably aggressive 65° head angle paired with a 75° (effective) seat tube angle, and reach ranging from 432mm on the small, to a decently rangey 493mm on the XL. Despite looking really slack, the effective seat angle at full extension feels near the listed number. I prefer a somewhat steep STA, so I ran the saddle near full forward on the rails. Keeping in mind that I was on the XL frame. At 6'-0", I could have easily run the large frame, but I was curious to dabble in the realm of a near half meter reach. BB height is on the low side at 330mm (13"), and chainstays are on the stubby end of the spectrum at 420mm (16.5") for all sizes.


Some angles are a bit better than others.


Full Unidirectional Carbon Fiber Frame, Naild R3ACT – 2 Play Suspension Technology, 27.5" Wheels, 150mm Travel, 148mm Boost Rear Spacing, Bolt On Thru-Axle
RockShox Pike RC 27.5”, 150mm Travel, Compression and Rebound Adjustment, Solo Air Spring, 110x15mm Boost Spacing, Maxle Stealth, 46mm Offset
RockShox Deluxe R, 210x60mm, Rebound Adjustment, Custom Tune, Trunnion Mount
Stan's No Tubes Sentry S1, 32mm Inner, Pinned Joint, BST Technology, Tubeless Compatible
Forged Alloy, 148x12mm, Quad Sealed Bearings, 6-Bolt Disc, 32H
Forged Alloy, 110x15mm, 6-Bolt Disc, 32H
14g Black Stainless Steel
WTB Trail Boss 27.5x2.6", Tri-Tech Triple Compound, Fast Rolling, Light Casing with Slash Guard, TCS Aramid Bead, Tubeless Compatible
SRAM GX Eagle 12-Speed
SRAM NX Eagle 12 Speed
SRAM Descendant 6K Aluminum, Direct Mount 12-Speed 32T, Boost Spacing
SRAM NX Eagle 12-Speed
SRAM XG-1275 12-Speed, 10-50T
Shimano XT MT520 4-Piston Hydraulic Disc, 203mm Rotor
Shimano XT MT520 4-Piston Hydraulic Disc, 180mm Rotor
Shimano MT500
Marin Mini-Riser, 6061 Double Butted Aluminum, 25mm Rise, 780mm Width, 5o Up, 9o Back
Marin 3D Forged Alloy, 35mm
Marin Locking
FSA Orbit, No. 42/47/ACB/S-4, Sealed Cartridge Bearings, 1 1/8"x 1 1/2”
KS LEV Integra Dropper Post, Southpaw Lever, Size S 120mm Travel, All Other Sizes: 150mm Travel
WTB Volt Race

House brand grips and bar get the job done.


As does the wee 35mm long Marin stem. With bonus bear.


My review bike is the cheapest of three spec levels. We're more often than not spoiled by five figure top tier builds; receiving a more budget friendly spec is refreshing. While it pains me to call a $5500 (USD) bike "budget," that's where we're at these days. Components are a solid performing mix of good bang for the buck bits. No carbon here, but no significant performance shortcomings. Detail below.

Cockpit Bits

the Marin brand stem, bar, and grips are all on point. No frills, but comfy ergonomics that get the job done. WTB Volt Race saddle is similarly cush for this tush. The 150mm drop KS LEV post did it's up/down duties well enough, but the clamp head developed a creak, and eventually a wobble by review end. I'd assume this is a warranty issue, but worth noting.


A NX Eagle shifter.


Twiddles a GX derailler.


The ebike specific Shimano MT520 stoppers are more or less a stripped version of XT 4 pots - similar chassis, but no adjustable engagement, and reach adjust requires an allen key. No complaints in terms of stopping power or modulation, but they did tend to pump up a bit on longer sustained heavy braking runs.


The SRAM Eagle mix of NX shifter and GX derailleur and cassette handle shifting duties. While not as posh as the XO and XX siblings, these blue collar bits get the job done just fine.


Shimano 4 pot stoppers. 203mm rotor up front.


And 180mm out back.


150mm Pike RC up front.


Compression adjustment is limited to low speed only.

Wheels & Tires

Stans Sentry S1 wheelset sports a contemporary 32mm inner rim width, and it stayed straight despite losing a bit of rear tension. The fat 2.6 WTB Trail Boss tires were decent all-rounders, working better than anticipated in the wet & slimy – the extra volume helping to somewhat offset the light-ish (EXO-esque) sidewalls. The smaller side knobs tended to fold a bit more readily than I'd like when pushed in corners, however.


2.6" WTB Trail Boss on 32mm Stans ZTR = a meaty tire profile.


WTB Volt Race is surprisingly comfy.

Weighty Things

This is not a lithe bike. Not skimping on carbon, this frame is sports audibly thick cross sections throughout; a massive swingarm, in conjunction with a near E bike-sized downtube; its a stout chassis. Overbuilt perhaps, but this feels like something that's going to handle some abuse, unlike some carbon trail bikes that you'd fear tipping over, let alone tossing into the weeds when things get hairball. This base spec bike also sports no carbon components, and is shod with girthy rims and tires. The unique suspension platform adds mass as well; the cantilevered BB form factor, slider mechanism & plethora of pivots, rear fenders, and an especially burly downtube bash guard all add up. I'm creeping up on the fact that this (XL) bike weighs 34.5lbs as its sits (including my heavy Saint pedals). That number will likely scare those of more trailbike oriented ilk, though I can't say it felt terribly porky to ride (likely owed to great pedaling characteristics).


Hail the dark majesty of the Northwest temperate rainforest.


Despite being on the plush and portly side, the Marin has some pop.


The Mount Vision is also happy on tech(ier) features.


supplying a 150mm bike with a shock that has no compression lockout lever is a bold move, but I can honestly say I never wanted for one. Even stomping out of the saddle, there's minimal monkey motion. Despite a high level of anti-squat, there's a surprising lack of perceptible pedal feedback when powering through chunky terrain. I'd expect the suspension to be more inactive under power, and feel kickback when pedaling into square edges, but the wheel just moves out of the way, and the bike smoothly sucks everything up. It's a unique feeling that had me picking the most chundery of lines just to see if it would hook up. Perhaps the addition of the slider offers a range of motion beyond typical 4 bar configurations? It's got FSR like sensitivity, but feels a good bit more efficient. Regardless of how it's achieved, it's certainly one of the best tech climbing bikes I've ridden.


Good idea to check the frame clearance before dropping into steep rollovers.


Significant anti squat helps mitigate light compression damping and a relatively linear leverage curve, but even at a recommended 25% sag, the shock is quite happy to rip through all it's travel on a surprisingly frequent basis (and I'm a svelte 160lbs). Though only larger drops heralded cringe worthy bottoming noises, you'd definitely want to stuff some volume reducers in the can for regular aggressive riding. Unfortunately the base spec Rockshox Deluxe R shock offers only rebound adjustment - with such an active and lightly damped platform, not having the ability to fine tune the compression circuit is a bit of a miss. So it's a plush, but not wallowy platform. The ability to charge through the chunder, while putting down power efficiently on the sprinty bits, contributes to a fun and lively ride on the downs. The moderately slack head angle balances stability and agility, and the stubby chainstays facilitates slower speed drops, manuals, and general hooliganism, making for a solid technical terrain playbike.

Cornering: Due to the fairly significant disparity between front and rear center length on my XL frame size (493mm reach / 420mm chainstay), carving corners requires a bit more emphasis on dynamic technique - ie, forward shift to weight the front tire for maximum bite, transferring rearward towards the exit. Not terrible, by any means, but having previously ridden a design with more balanced weight distribution has me wanting for an inch longer swingarm.


Bar turns for days.

Ruminations on Product Placement

At 150mm x 150mm travel, you'd be inclined to position this as a typical trail bike (if you want to get tedious about category pigeonholes), but given this bike's stout nature, thinking of this as more of an aggro trail / enduro thrasher seems more apropos. The 150mm Pike is a bit limiting when things get especially chunky, however. As an experiment I bolted on my 160mm Pike for giggles. 10mm doesn't seem like much, but adding a bit of BB clearance, extra cush, and a slightly slacker HA contributed to a nicely balanced aggressive ripper. I'd certainly chose this bike with a 160mm fork over the 160mm x 160mm Wolf Ridge as an Enduro race rig (as such it begs the question: where is the Wolf positioned within the current Marin lineup?). As this bike straddles categories somewhat, I'd have liked to have seen at least one of the spec levels focus a bit more on a race spec (with a longer fork).


Surfing the woodsy wave.

Maintenance and Durability

The plethora of pivots stayed tight for the extent of the review, and the slider remained stiction free. Said slider is a non-pressurized component with good mud protection, so it seems to be a low maintenance component. I'd assume periodic cleaning and lubing - in keeping with typical fork & shock service, but Marin doesn't provide suspension maintenance guidelines, and the pivots use proprietary nuts, so they're not making things easy for the home gamer.


And some classic Shore content.

Final thoughts

Marin is waging a bit of an uphill battle with this bike. It's weighty. It's not conventionally pretty (to be kind). It has a heap of pivot bearings and a proprietary sliding component. The low hanging downtube likes to smash into hard things on a semi-regular basis. That said, it's not a bad bike. The suspension achieves the feat of balancing active plushness with pedaling performance impressively well, and it's a playful and effective all round ripper. If you're open minded to the aesthetics, this is a fun alternative to the mainstream.


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+2 oldmanbuilder Dave Smith

I think the real star here is this beautiful trail in the fairy forest ...

I think I recognized the last picture, but can we know more about the previous ones ? Thanks !

With such nice pictures, I think I could buy any bike !



That trail (all but the last photo) is actually in Squamish. Comes off Angry Midget. I'm surprised to see it featured so prominently.


+1 Perry Schebel

Anvil Island, actually.



I must be thinking of a different trail.


+1 Timer

This bike to me feels like a Yeti done by blind people.  The suspension has all these extra bits to make it work, but packaging is a hot mess and adds weight. The Yeti people figured out a way to make it look nice and be light, but Marin decided to just call it a day and sell a ugly heavy bike.


0 Cr4w ninjichor

Is it so they can use same chassis for their ebike version? 

Or do they just think ebike aesthetic is where it's at?!


+1 StefB

Someone in the pinkbike comments nailed it on the Marin/Polygon bikes... Something to the effect of, "the silhouette has all the grace of a shitting dog".


+4 Dave Smith Andrew Major Niels van Kampenhout Timer

random: getting thrown shade for riding an ebike was a not uncommon experience on this rig.



If it had a built in speaker that activated with a thumb button and made e-bike noises so I could motor past people on the climbs I could get into the looks. ;)



How do you think this bike would do in the bike park? Park riding isn't my principle use of my longer travel bike, but I do take it there. Would this be as fun as other bikes in the ~150mm category? 

Because I'm really happy to buy aesthetically ugly things at deep discounts after no one buys them at full price.



the fun factor of this bike is certainly up there with anything else i've ridden, but as park riding tends to be more smashy than every day trail use i'm not 100% sure - based on the current (quite linear) shock tune. the question being whether you could get enough volume reducers in the shock to avoid regular bottoming. unfortunately i didn't manage to get up to whistler to see how it fared in said conditions. i'd wager that for the average rider (with a bit of shock tuning) it'd be fairly capable.



And I though my Murmur was heavy at 34lb...



This comment has been removed.


>As an experiment I bolted on my 160mm Pike for giggles. 10mm doesn't seem like much, but adding a bit of BB clearance, extra cush, and a slightly slacker HA contributed to a nicely balanced aggressive ripper.

Does your Pike have the same damper? If not, how much difference do you think just the 10mm would make?



not the same damper (an older, well beat iteration, actually). pretty sure any benefits were the result of raising the front a ~half inch more than anything.


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