2020 Jamis Faultline A1

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Dual suspension opens up a whole new world of speed and control off-road. Our proven MP2 design, the frame platform that’s won us numerous industry accolades and Bike of the Year awards, is now available with either 29” or 27.5” hoops. Perfect rigs for the experienced rider who is looking to upgrade to their first dual suspension or for new riders looking for a head start in performance.


Frame Triple-butted 6061 alloy, 115mm travel mp2 suspension, 1.5 - 1 1/8” tapered head tube, asymmetrical chainstays w/12x148mm thru-axle dropout, internal dropper post routing, ISCG05 chainguide mount, Rock Shox Deluxe Select+ RL air shock with rebound adjust & lock out, replaceable derailleur hanger
Fork Rock Shox 35 Gold RL 29", air spring compression, lever actuated lockout, external rebound, 35mm stanchions, magnesium lowers, 15x110mm axle, 130mm travel
Wheels WTB ST i25 TCS 29" tubeless rims, 32H, Formula 15x110mm front & 12x148mm rear 6-bolt disc hubs, stainless spokes
Tires WTB Vigilante 29 x 2.35” Front & Trail Boss 29 x 2.25” Rear, TCS Tubeless
Derailleurs SRAM SX Eagle, 12-speed
Shiftlevers SRAM SX Eagle, 1x12-speed
Chain SRAM SX Eagle, 12-speed
Cassette N/A
Pedals N/A
Brakeset Shimano MT401 hydraulic disc, 180mm front & 160mm rear RT26 6-bolt rotors
Handlebar Race Face Ride, 35 x 760mm
Stem Race Face Ride, 50mm
Seat Post KS Rage Dropper, Southpaw remote
Saddle WTB Volt
Sizes S (15.5), M (17), L (19), XL (21)
Weight 33 lbs

XC mp2 suspension - The mp2 suspension system is active with a near vertical wheel axle travel path, plus excellent lateral & torsional stiffness for rear wheel tracking precision.

Tapered Head Tube - Riding fast with control requires steering precision, which starts with the front of the bike. Stiffening this area results in less wheel deflection, more wheel control. A tapered 1 1 /8 to 1 1 /2 head tube serves up a significant increase in rough terrain tracking and stability without much of a weight penalty compared to standard 1 1 /8 systems.

Asymmetrical Chainstays - The chainstays are asymmetrical, with an elevated straight stay on the non-drive side and a dropped curved stay on the drive side. The drive side must be dropped & curved to clear the chain, but running the non-drive side straight from the dropout to BB pivot reduces weight while significantly stiffening the rear triangle laterally.

Tubeless - Benefits of a tubeless set-up are reduced rotating weight and the ability to use lower inflation pressures for greater traction without the risk of pinch flats. WTB TCS rims feature a tubeless UST On-Ramp profile providing a consistent fit between the rim and the tire for easy installation and inflation.

WTB Saddles - WTB has been producing mountain bike components for over thirty years. The Volt is the latest evolution in saddles. It has enough padding for all-day riding comfort yet scant enough weights for XC competition.

Stopping Power - Top-notch braking shouldn't break the bank. Shimano's hydraulic brakes offer the power, the smooth modulation, and all-day, all-conditions reliability.

Air Spring Suspension - Rock Shox Deluxe and Monarch shocks offer adjustable rebound damping and a single valve air spring. Its light and easily adjusted to suit rider and riding style.

Why Thru Axles? - Securing the rear wheel to the frame by threading a 12mm axle into the rear drop-outs is not only safer, it's stiffer. The rear wheel tracks directly in line with the frame, for more precise handling, so you can go faster with more confidence. The increase in stiffness of a 15mm fork axle improves steering & handling significantly. It also puts less stress on the fork's internals, improving fork durability and performance. The hub dropouts provide a self-centering feature for the wheel for fast, easy installation.

One and Only - The 1x drivetrain philosophy is to make it simpler, lighter and more durable. Specific chainring tooth profiles, clutch-type rear derailleurs, and wide range cassettes are developed for an incredibly wide gear range and maximum control without the need to chain tensioning devices or guides.

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