Shaums March was at Crankworx putting time in on the 2011 Marin Quad DH, a 10" travel machine that uses Marin's Quad Link suspension design. Inside you'll find both photos and a video to watch if you want the lowdown on this unique bike.
Watch the video to learn more about the new Marin Quad DH!
You're looking at the 2011 Marin Quad DH. If you've been paying attention you'll know that this machine has been in the works for awhile, over four years of tweaking and fine tuning! Many changes have been made as the design has gone through the prototype process to finally end up with this polished DH bike. The Quad DH retains the 10" of rear wheel travel that the proto's used, but gets some geometry adjustments in the form of an even lower bottom bracket and a slack 64 degree head angle. Oh yeah, it's lighter as well! The bike is available right now.
Curious as to what is going on here? This is Marin's Quad Link suspension, the same design as found on their other full suspension bikes, but tweaked to control the Quad DH's 10" of travel. The two short links, Marin has named them "Quick Links", create a virtual pivot point out in space that the swingarm rotates around. But it gets cooler: the actual location of the virtual pivot changes depending on where the bike is in it's travel, letting it behave differently depending on the terrain and needs of the rider. The goal is to make a bike that absolutely eats square edge bumps and carries speed through the chunder very well, but can still pedal out of a corner with the best of them.
Burlyness. This is one very solid looking bike. Yes, this frame is lighter than the prototype version, but eying up the Quad DH tells me that this should also be one hell of a sturdy ride. Marin is so confident in their stiffness and ability to protect the pivot bearings that their bikes come with a lifetime warranty on all bearings - impressive! I'm currently testing this bike's little brother, the Attack Trail 6.9, and it has to be one of the most rock solid all-mountain bikes that I've ever beat on.
The de rigueur tapered headtube. Say what you will, but tapered headtubes make enough sense that they are quickly becoming standard on the front of everything from DH bikes to trail bikes, and even some XC machines. Strong, stiff, and light, its called progress people! The Quad DH uses an integrated headset to keep things low. Love the headtube badge!
The Quad DH's dropouts are both replaceable just in case disaster strikes. Of course the rear end measures in at 12 x 150mm to keep everything as stiff as possible. The cyan color of the Quad DH that you see here is actually the same as was used as the 1991 on their Team model. This being their 25th anniversary, the color was brought back on the Quad DH, the Pine Mountain 29'er, and Andrew Taylor's DJ bike, the Alcatraz.
Shaums' race rocket is looked after by Fox suspension all around, with his fork sporting a 2011 cartridge and the rear of the bike controlled by an RC4. If you have yet to try the Kenda Excavator tires that you see on both ends of his Quad DH, you owe it to yourself to have a go on them. I've spent lots of time on both the 2.5" and 2.3" sizes and have been amazed with how predictable they are. You'll also be pumped to know that they cost less than most other high end rubber.
You won't find any of those "new" old neon green or purple colors anywhere on Shaums' bike. Gold Race Face Atlas cranks match his gold hub and rim combo... which matches the chainguide hardware. Plenty of show, but plenty of go as well!
After so many years of being such a bad ass rider, Shaums has a lot of knowledge to share. This is where his Mad March Racing coaching comes in. Focusing on rider form, race technique, and bike setup, Mad March Racing offers both group coaching and private clinics that will do a lot more for you than if you spent the same amount of money on new bike parts! Coaching is available all over the U.S. and Canada. If you're a solid rider and want to help others enjoy the sport, Mad March Racing also holds International Mountain Bike Instructor Certifications courses at all different levels.