Rocky Mountain Bicycles.

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FLATLINE FR

Mountain, Gravity & Freeride

Specification

FrameRMB FORM 7005 Alu, hydroFORMed downtube, alu seatstay, alu chain stay
ForkRockShox Domain 302
Front Travel180mm, Rebound
Rear ShockFOX Van R Custom Valved
Rear Travel170-213mm
Head SetFSA Orbit Z1.5 / 1 1/8
StemRMB DH 30° 35mm
HandlebarRMB DH 700mm x 30mm Rise x Ø31.8mm
BrakesAvid Juicy 3 Hydraulic Disc 203mm
Brake LeversAvid Juicy 3
ShiftersSram X5 Triggers 9spd
Gearing (FR)N/A
Gearing (RR)SRAM X7
Cranks & ChainringsTruvativ Hussefelt 170-175MM 36T / Boxguide
Bottom BracketTruvativ Howitzer
PedalsRMB Low Pro Flat
Hubs (FR)Wheeltech Disc Cartridge Bearing 20mm Axle
Hubs (RR)Wheeltech Disc Cartridge Bearing W/12mm Thru Axle
CassetteSram PG-950-9 11-32T
ChainSram PC951
SpokesDT Swiss Champion
RimsAlex FR32 Disc
Tires (RR/FR)Maxxis Minion DHF 2.5 FT/ DHR 2.5 RR A.V.
Seat PostRMB SP-358 2-Bolt 30.9mm
SaddleSDG Bel Air RL

Geometry

SizeXS (inch) (Fork 22,2 inch)XS (inch) (Fork 22,8 inch)S (inch) (Fork 22,2 inch)S (inch) (Fork 22,8 inch)M (Inch) (Fork 22,2 inch)M (inch) (Fork 22,8 inch)L (Inch) (Fork 22,2 inch)L (Inch) (Fork 22,8 inch)
Head Length
Head Angle65.7°64.6°65.7°64.6°65.7°64.6°65.7°64.6°
Seat Angle74,073,074,073,074,073,074,073,0
Seat Tube length15,01516,016,017,017,01818,0
Horiz. Toptube Length21,721,722,322,323,223,22424,0
Headtube Length4,44,44,44,44,44,44,44,4
Chainstay Length17,517,517,517,517,517,517,517,5
BB Drop1,01,01,01,01,01,01,01,0
Wheelbase44,645,546,146,247,047,147,847,9
Front-Centre
Standover Height282828,528,52929,029,529,5
Fork Rake
Seat Tube (center-center)

FORM


The heart of a bike is its frame. The geometry, the material, the feel, and the way it reacts under the rider are the very essence of the ride. That’s why we’ve introduced FORM™ – the design and manufacturing process of our high-performance frame tubing. Our philosophy behind FORM™ tubing is to push the limits of tube and frame design to create the frame’s unique riding feel.

Engineered Ride Quality: FORM™ tubing is a line of high-performance tubes designed to elevate the superior ride quality for which Rocky Mountain Bicycles are known. Innovative design: With 25 years of innovation, we continue to push the boundaries of bicycle design. FORM™ tubing is the exciting new frontier of our creativity.

Attention to detail: Every detail in a FORM™ tube set is carefully engineered and has a purpose: from the slightest variations in shape, to wall thickness, tapers, flares and bends.

Uncompromised quality: FORM™ tube sets are manufactured with premium materials and delivered by the best suppliers in the industry to meet Rocky Mountain’s strict requirements.

LC2R


The Low Centre Counter Rotating - LC2R - patented suspension is a laterally stiff design that offers a highly predictable ride in all conditions. Its low sprung weight and concentrated suspension mass allow the LC2R suspension to respond faster to ground forces, such as stutter bumps, and keep the rear wheel glued to the ground during acceleration.

LC2R suspension is a single pivot design, with the main pivot located just above and behind the bottom bracket. Both chain and brake forces are concentric to this pivot through-out the suspension travel, which eliminates pedal “bob” and brake jack. A thrust/ tug link engages the top link to create a rising rate suspension and the much-sought-after “infinite travel” feel. We tune LC2R to create an optimal suspension rate for different types of riding – from super cross country to Freeride and to downhill.

FLATLINE

    Ride Guide

  • DH Racing / 100%
  • Freeride / 85%
  • Bike Park / 85%
  • Linearly Rising LC2R suspension rate is tuned for freeride and downhill racing; suspension progression is inherent to the linkage design, not the shock absorber.
  • Concentric to the main pivot point, chain and brake forces eliminate pedal “bob”; suspension is stable during pedaling, and “platform” pedaling is inherent to the suspension design - not the shock.
  • Counter rotating top link creates a more laterally stiff Swingarm for increased control in tight corners, and the occasional sideways landing.
  • The counter rotating link along with the kinked down tube allow for a low and center positioning of the shock absorber in the frame. This low-slung concentrated mass allows the bike to rotate in any direction faster than if the center of mass was positioned higher in the frame.
  • Oversized double-row angular contact bearings increase bearing life, and allow for a less expensive bearing to be used. (more affordable for retail level replacement)
  • Triangulated Swingarm maximizes suspension strength, while keeping its weight to a minimum.
  • Tuglinks (as opposed to thrustlinks) increase suspension sensitivity to very small bumps, further aiding in smoothing out the trail.