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    • Marin Rock Spring Base 27.5 Hardtail Bike 2019


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  • Marin Rock Spring Base 27.5 Hardtail Bike

    Ready to keep you in control wherever you ride, the Rock Spring Base offers you a fun and lively ride. Built around Marin’s Series 1 6061 Aluminium frame, it puts you in the ideal riding position for day ling comfort and rider control on challenging terrain. This is further enhanced by the Suntour front suspension forks and mechanical disc brakes for all-weather stopping power.

    Shimano Gearing and Double Wall MTB Wheels

    To ensure you can pedal efficiently in all situations, Marin equipped this capable hardtail with a reliable Shimano 3x7 speed drivetrain. This means no matter how steep the climb, you’ll have the gear range you need to conquer it and be able to get quickly up to speed. The ideal starter MTB bike, this bike offers a capable ride at a very appealing price point.

    All Marin bikes on Chain Reaction Cycles are covered by a 2 year warranty. Proof of purchase is necessary.


    • Frame: Series 1 6061 Aluminum, "Right Fit" sizing, 135mm forged dropouts, IS disc caliper mount
    • Fork: SR Suntour XCE DS 27.5", 100mm travel, custom coil spring (80mm Size XS & S)
    • Stem: Marin Alloy, 60mm length
    • Headset: FSA No.10-P
    • Handlebars: Marin Riser, 25mm rise, 700mm width
    • Grips: Marin Dual Density
    • Shifters: Shimano Tourney 3x7-Speed
    • Brakes: Tektro MD280 mechanical disc, 160mm rotors
    • Crankset: Shimano FC-TY301, 42/34/24T
    • Bottom Bracket: Sealed cartridge bearings, square taper
    • Front Derailleur: Shimano FD-TX500
    • Rear Derailleur: Shimano Tourney, 7 speed
    • Cassette: SunRace 7 speed, 11-34T
    • Chain: KMC Z50
    • Hubs: Forged Alloy, 6-Bolt disc, 32H
    • Rims: Marin Aluminum double wall 27.5"
    • Spokes: 15g black, Stainless Steel
    • Tyres: Mountain Tire, 27.5"x2.1"
    • Seat Post:Marin Alloy
    • Saddle: Marin MTB

    Easy Assembly

    When you order a bike, one of our trained mechanics will carefully prepare and pack your bike for shipping. Upon delivery, the assembly is simple and all necessary tools are conveniently included in the box.

    Depending on the delivery service and destination, bikes will either be delivered in a large or a small box. Below is a guide as to how your bike will arrive:

    • All bikes for delivery within the UK and Republic of Ireland will be delivered in a large box, except for kids’ bikes and BMX bikes, which are always delivered in manufacturer’s boxes.
    • All bikes for delivery within the EU on a standard service will be delivered in a large box. If an express delivery option is chosen, your bike will be packed into a small box. Again, the exception is kids’ bikes and BMX bikes, which are always delivered in manufacturer’s boxes.
    • All bikes for worldwide delivery outside the EU will be delivered in small boxes.

    This video demonstrates assembly from a SMALL BOX.

    This video demonstrates assembly from a LARGE BOX.

    Buy Marin Bikes from Chain Reaction Cycles, the World's Largest Online Bike Store.


    • Colour: Silver
    • Frame Size: M, S, XS
    • Wheel Size: 27.5" (650b)
    • Gender: Unisex
    • Speed: 21 Speed

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    RRP £449.99
    £269.99 269.99
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    27.5" (650b)
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