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Sea Otter 2013: Marin prototypes spotted

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The Attack Trail is back in the Marin line for 2014, now with 650B wheels

The Attack Trail is back in the Marin line for 2014, now with 650B wheels (Image credit: Josh Patterson/Future Publishing)
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No dual link design here, just a straightforward single pivot...

No dual link design here, just a straightforward single pivot... (Image credit: Josh Patterson/Future Publishing)
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...that uses a rocker link to drive the rear shock

...that uses a rocker link to drive the rear shock (Image credit: Josh Patterson/Future Publishing)
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The Rocky Ridge is a new aggressive hardtail with 650B wheels

The Rocky Ridge is a new aggressive hardtail with 650B wheels (Image credit: Josh Patterson/Future Publishing)
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The Rocky Ridge will come equipped with a 130mm suspension fork

The Rocky Ridge will come equipped with a 130mm suspension fork (Image credit: Josh Patterson/Future Publishing)
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The bent seat tube allows for shorter chainstays, while still providing clearance for a direct mount front derailluer, should you need more than one chainring

The bent seat tube allows for shorter chainstays, while still providing clearance for a direct mount front derailluer, should you need more than one chainring (Image credit: Josh Patterson/Future Publishing)
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A seat tube brace allows for generous standover clearance

A seat tube brace allows for generous standover clearance (Image credit: Josh Patterson/Future Publishing)
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Like the two new carbon bikes, the Rocky Ridge uses a 142x12mm rear axle

Like the two new carbon bikes, the Rocky Ridge uses a 142x12mm rear axle (Image credit: Josh Patterson/Future Publishing)
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This year the Cortina is also available in carbon

This year the Cortina is also available in carbon (Image credit: Josh Patterson/Future Publishing)
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The cables are routed through the top of the downtube

The cables are routed through the top of the downtube (Image credit: Josh Patterson/Future Publishing)
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The Cortina uses a Press Fit 30 bottom bracket

The Cortina uses a Press Fit 30 bottom bracket (Image credit: Josh Patterson/Future Publishing)
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The Cortina's split seatstays

The Cortina's split seatstays (Image credit: Josh Patterson/Future Publishing)
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140mm of travel in the rear

140mm of travel in the rear (Image credit: Josh Patterson/Future Publishing)
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The Mount Vision and the Attack Trail share the same modular chain guide system, which uses three plates for various 1x and 2x drivetrains

The Mount Vision and the Attack Trail share the same modular chain guide system, which uses three plates for various 1x and 2x drivetrains (Image credit: Josh Patterson/Future Publishing)
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The same clean routing through the head tube

The same clean routing through the head tube (Image credit: Josh Patterson/Future Publishing)
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The date on the stickers is a refrence to when the production bikes will debut

The date on the stickers is a refrence to when the production bikes will debut (Image credit: Josh Patterson/Future Publishing)
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Both the front and rear triangles are constructed from carbon

Both the front and rear triangles are constructed from carbon (Image credit: Josh Patterson/Future Publishing)
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The rear brake, front and rear derailleur cables, and the dropper seatpost are all routed through a ports in on the left side of the head tube

The rear brake, front and rear derailleur cables, and the dropper seatpost are all routed through a ports in on the left side of the head tube (Image credit: Josh Patterson/Future Publishing)
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The rear brake and rear derailleur lines exit the downtube in front of the bottom bracket shell

The rear brake and rear derailleur lines exit the downtube in front of the bottom bracket shell (Image credit: Josh Patterson/Future Publishing)
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The 150mm-travel Attack Trail prototype was equipped with the new Fox Float X shock

The 150mm-travel Attack Trail prototype was equipped with the new Fox Float X shock (Image credit: Josh Patterson/Future Publishing)
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RockShox Pike fork provides 160mm of front suspension

RockShox Pike fork provides 160mm of front suspension (Image credit: Josh Patterson/Future Publishing)
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Marin's Quad Link design uses two links moving in series

Marin's Quad Link design uses two links moving in series (Image credit: Josh Patterson/Future Publishing)
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The Attack Trail uses a 73mm threaded bottom bracket

The Attack Trail uses a 73mm threaded bottom bracket (Image credit: Josh Patterson/Future Publishing)
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The Mount Vision is a lightweight trail bike with 140mm of travel

The Mount Vision is a lightweight trail bike with 140mm of travel (Image credit: Josh Patterson/Future Publishing)
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Like the Attack Trail, the Mount Vision now sports 650B wheels

Like the Attack Trail, the Mount Vision now sports 650B wheels (Image credit: Josh Patterson/Future Publishing)
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The Mount Vision has a 67.5-degree head tube angle when paired with a 140mm fork

The Mount Vision has a 67.5-degree head tube angle when paired with a 140mm fork (Image credit: Josh Patterson/Future Publishing)
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ricing is yet to be finalized for the four new models

ricing is yet to be finalized for the four new models (Image credit: Josh Patterson/Future Publishing)

This article originally published on BikeRadar

At this year's Sea Otter Classic, Marin had four prototypes dressed in black with decals that read “08.01.2013”, a reference to the expected debut of the new bikes. Three of the four new bikes are carbon and all reflect one of two current trends: 650B wheels or disc brakes for cyclo-cross.

Attack Trail is back

After a brief hiatus the Attack Trail is back in the Marin line, now with 650B wheels and a full carbon frame. “We really think this is the sweat spot for this wheel size," said Marin product manager Mark Vanek.

The Attack trail uses Marin’s Quad Link suspension design, which uses a pair of short links to control the movement of the rear suspension. It has 150mm of rear suspension travel and is compatible with 150mm-160mm forks.

The carbon frame features internal routing for the rear brake, front and rear derailleurs, and a dropper seatpost, all of which tuck cleanly into the frame on the left side of the head tube. The production bike will have a down tube protector with channels molded into the guard that will also for external cable routing as well. The frame’s 66-degree head tube angle places this bike on the slacker end of the 150mm-travel spectrum.

The frame has a 73mm threaded bottom bracket shell and uses an interchangeable chain guide system for use with various 1x or 2x chain guide options.

Mount Vision now in 650B

Like the Attack Trail, the Mount Vision also gets 650B wheels and a full carbon frame. It sports 140mm of front and rear suspension. Although the difference in rear wheel travel is only 10mm, the Mount Vision and the Attack Trail have very different personalities.

Where the Attack Trail is an aggressive all-mountain/enduro bike, the Mount Vision is positioned as a lightweight, performance-oriented trail bike. It has a 67.5-degree head angle and a simplified suspension design that Marin calls Iso Track, which is a straightforward single-pivot design with a rocker link driving the shock. According to Vanek, the primary motivation for moving to a simplified suspension design to save weight, bringing the complete Mount Vision prototype down to a claimed 25lb/11.34kg.

Like the Attack Trail, the Mount Vision has a smart-looking integrated housing port on the head tube, a threaded bottom bracket and uses the same modular chain guide system.

Rocky Ridge trail hardtail

The third new mountain bike in the Marin line is a long-travel 650B hardtail with an aluminum frame. Unlike the two new carbon bikes, the Rocky Ridge has external routing for all the cables, save for the dropper seatpost, which is routed through the down tube.

Carbon Cortina

Marin introduced the disc-equipped Cortina in aluminum last year. For 2014 there will be two carbon builds as well.

The carbon Cortina is constructed using the same methods as Marin’s carbon road and hardtail mountain bikes: individual tubes are formed over mandrels and then mitered and wrapped. Marin claims this method allows the engineers to fine tune the ride characteristics of each tube.

It uses a Press Fit 30 bottom bracket, and internal cable routing along the top of the down tube that allows the user to select between ports for Shimano Di2 (shown), internal routing with housing, or internal routing without housing.

The rear brake caliper is mounted to the chainstay. While many disc-equipped road and cyclo-cross frames are made to take either a 140mm or 160mm rear rotor, the Cortina is designed specifically for a 160mm rear disc. Rear dropout spacing is set at 135mm.

Vanek expects the top-end build to be sub 18lb/8.2kg.

Pricing is yet to be determined for the four new bikes. Finished models will debut August 1, with availability expected to be shortly thereafter.

Click here for Cyclingnews' complete Sea Otter coverage