Rocker SS 27.5+

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  • Regular price $1,199.00








Rocker SS 27.5+

Are you a mod or a rocker?

Whether you call it 27.5+, B-Plus, or mid-fat, it all means the same thing: a super-fun four-season ride with more rubber on the dirt. Our new Rocker 27.5+ occupies that sweet spot halfway between fat bikes and cross-country bikes. It’s a do-it all size that makes you wonder, why did mountain bikers spend so many years on skinny tires? With plus you get the advantages of more volume minus the inertia and sluggishness of fat bike tires. We mount voluminous Rekon+ tires on wide Race Face rims, allowing you to run lower pressure for more grip and dampening on chattery trails. The 30.9 seat tube provides more dropper post compatibility, and the Boost 148 rear axle gives you ample clearance plus a tight rear end. We added a red-hot Gates CenterTrack belt (with ISCG tabs for extra protection) to the Laguna Seca Blue steel frame for extra punch. Whatever the season or trail, the Rocker SS 27.5+ is mountain biking rock-n-roll boiled down to its purest essence.


Technical Information

Reynolds 853 DZB Tubing

Seamless Air-Hardening Heat-Treated Steel with Double Butted Zones. The benefits of air-hardening steels are particularly noticeable in the weld area where, unlike conventional steel alloys, strength can actually increase after cooling in air immediately after welding. 853 is heat-treated to give high strength and damage resistance, and the steel properties allow thin walls to be used, so that lower weight but fatigue-resistant structures can be made. The chemistry includes carbon, manganese, chrome, molybdenum, silicon, copper. The interaction between the alloys result in a fine grain structure that forms with air-cooling without the traditional “quenching” (fast cooling in water or oil) process. High strength from bainitic phase steel after a series of cold-working operations. Heat-treatment to the 853 specification raises the yield strength for the entire tube, increasing dent and impact resistance.

Gates CenterTrack

Next-gen Carbon Drive System. Unique, super-strong, carbon-reinforced polyurethane system that requires no lube and provides a nearly silent ride. CenterTrack is stronger, lighter, more compact, and better at shedding debris than the prior Gates systems.

Dropout Modularity

Patented Kobe 2 Slider Dropouts allow belt-driven or chain-driven or geared configurations.

Boost 148 Rear Spacing

New standard to allow better clearance for short seatstays and big tires, plus a better spoke bracing angle for stiffer wheels.

110 mm Front Spacing

Better spoke bracing angle for a stiffer front wheel.

30.9 mm Seattube

Larger diameter seattube than most steel frames allowing compatibility with more dropper posts available in the market.

Tapered Steerer and Headtube

Stiff steering handling up front.

Frame Size Small Medium Large X-Large
Effective Top Tube Length 22.5" 572mm 23.5" 597mm 24.5" 622mm 25.5" 648mm
Seat Tube Length 15" 381mm 17" 432mm 19" 483mm 21" 533mm
Head Angle 69°
Seat Angle 75°
Chainstay Length Min: 16.8" (427mm), Max: 17.8" (462mm), Shipped: 17.2" (436mm)
Head Tube + Integrated Headset 3.9" 100mm 4.3" 110mm 4.7" 120mm 5.1" 130mm
Stand-over 27.0" 685mm 27.0" 685mm 28.1" 713mm 29.1" 739mm
Bottom Bracket Height 11.9" 301mm 11.9" 301mm 11.9" 301mm 11.9" 301mm
Bottom Bracket Drop 2.4" 61mm 2.4" 61mm 2.4" 61mm 2.4" 61mm
Wheel Base 42.9" 1091mm 44.0" 1117mm 45.0" 1143mm 46.0" 1170mm
Reach 16.2" 411mm 17.1" 434mm 18.0" 456mm 18.9" 480mm
Stack 23.9" 607mm 24.3" 617mm 24.6" 626mm 25.0" 635mm
Rider Height 5'2" - 5'6" 5'7" - 5'10" 5'11" - 6'2" 6'3" - 6'7"
Rider Inseam 28" - 30" 28" - 32" 29" - 34" 35" - 38"
Component Brand Model
Fork RockShox Reba RL Boost 110x15, 120mm travel, 51mm offset, 110mm hub spacing
Headset FSA NO.42/ACB
Crank Sram X5 with threaded 73 mm english bottom bracket
Brakes Sram Level TL, 180 mm front rotor, 160 mm rear rotor
Belt Gates CenterTrack, 113T, red color
Front Sprocket Gates CenterTrack, 42T
Rear Sprocket Gates CenterTrack, 26T
Rims Race Face Aeffect Plus
Hubs Race Face Boost 110x15 front, Boost 148x12 rear
Tires Maxxis Rekon+ 27.5 x 2.8"
Stem Race Face 35mm bar clamp, 60mm length, 6 degree
Handlebar Race Face Aeffect 35mm clamp diameter, 10mm rise, 760mm width
Grip Ergon GA2
Seatpost Truvativ Stylo 30.9mm x 400mm
Seat Clamp Spot 33.1 mm clamp diameter
Saddle WTB Silverado

Mobile App for Android and iOS

Gates Carbon Drive is the high-tech belt drive offering for bicycles. Interested in key parameters of your drive like speed ratio or center distance? Want to know what belt lengths or sprocket sizes will fit your ride? What about comparing one bike to another to tweak your ratio perfectly? With our calculator and catalog, you can stay on top of the perfect setup for your drive.


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