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Marin Bikes Rocky Ridge 7.4 (2014)

General

Product Category
Brand Marin Bikes
ModelRocky Ridge 7.4
Size15, 17.5, 19
ColorBlack/Raw/Silver

Specific

Bottom bracketSRAM Giga X Pipe
Brake leversShimano Hydraulic
Brake rotorShimano, 7" front, 6" rear
BrakesShimano M445 Hydraulic Disc
Cassette Shimano DEORE, 11-36, 10-Speed
ChainShimano HG54
Crankset Truvativ Firex 1.1, 32-Tooth Single with GXP Hollow BB Spindle
Features27.5” Platform: Newer frame layouts designed to maximize the inherent benefits of 27.5-inch wheels, which combine the speed and stability of 29-inch wheels with the agility and acceleration of classic 26-inch mountain-bike wheels. 27.5" wheels allow a clearly different riding feel than 26" or 29" frames and bikes. This platform blends the features into an true all around Mountain Bike that satisfies the needs of many different riders. It has some of the rolling efficiency of 29ers, but coupled with the more robust and stiff feel of 26" wheels. Stealth Dropper Seatpost Routing: Hidden internal routing for dropper seatposts, with remote activation. Internal routing is cleaner, reducing the amount of external cabling for a cleaner look and less possibility of cable snags. Tapered Head Tube: As bicycle forks evolved, the diameter of the "steerer tube" of a fork, and the "head tube" of the frame (which houses the steerer tube and headset) have steadily increased. Years ago, forks were fairly standard at a 1" steerer diameter. This increase to 1-1/8" (also known as OS) in the 90's, and even 1-1/4" and 1.5" sizes became some what common. In particular, 1.5" was used on Freeride or downhill frames due to the inherent increase in strength that comes from the larger diameter. But there were some problems, 1.5" forks required very large head tubes, and were heavy. As the sizes evolved, it was realized that using a tapered steerer tube would offer up the best of both worlds. Marin uses tapered forks that have a 1.5" lower diameter, but then taper to a 1-1/8" upper diameter. This reduces weight, but keeps very high strength where it's needed, at the base of the steerer tube, where it meets the fork crown. This type of tapered fork greatly increases stiffness and strength, while keeping weight to an absolute minimum. Unlike many other companies, if a Marin bike has a tapered head tube, it also has a tapered fork, to take maximum advantage of the technology. 142mm Through-Axle: Rear-hub axle standard featuring a 12mm-thick through-axle that, while stronger and stiffer than a standard quick-release, still allows for easy removal of the rear wheel. The 142mm standard maintains the standard 135mm chainline, but adds a 3.5mm shoulder to each side of the rear hub. This shoulder shares the load of the rear wheel with the rear 12mm axle, rather than placing the full load of the rider on the axle alone.
Fork type Rock Shox Sektor Silver TK 27.5 Solo Air, 130mm Travel, Tapered alloy Steer Tube and 15mm Maxle Light System
Frame type 6061 Aluminum, Triple Butted Hydro Edge II Top and Down Tubes, Double Butted, Tri-Burner XXL Seat and Chain Stays
HeadsetFSA Orbit 1.5B ZS, 1 1/8” Top, 1.5” Bottom
Hub front Formula, 32 Hole
Hub rear Joytech 142 x 12mm Through Axle
Rear derailleur Shimano Deore Shadow Plus
Recommended forTrail
Rims type Alex MD21, 27.5”, 32-Hole
SaddleFizik Nisene
Shifters Shimano DEORE, 2 Way Release, Right Side Rear Only, 10-Speed
Spokes 14 Gauge Black Stainless
Stem Marin OS Alloy Threadless, 31.8mm Bar Clamp
Tires Schwalbe Nobby Nic Performance, 27.5 x 2.35, Folding Bead
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