Decathlon - Rockrider Mountain Bike ST 100, L, 27.5", Black

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Comfort 1st: CGF frame with raised position, 80 mm suspension, Ergofit hammock saddle with Flex stem, 27.5" wheels (26" in XS") so you stay comfortable as you ride. Get away from it all on your 1st mountain bike tour. Have fun as you tackle small obstacles in the great outdoors!

  • Cycling comfort: Enjoy: the high position (CGF frame), 80mm suspension, hammock saddle, flex stem
  • Efficiency: Progress: light frame, 21 speeds, 27.5" double-walled wheels (26.1" wall in XS)
  • Precision: Control your path with tires with side lugs and V-brakes.
  • Entirely designed and developed in France at the B'Twin Village (Lille), this mountain bike is the fruit of the work of an expert team of passionate mountain bikers. To best meet the need for comfort and ease expressed by beginner mountain bikers, the team created, designed, and tested the ST100, involving riders at every stage of the project. Whether you're heading out alone, with friends or family, the fun of riding the ST100 mountain bike has been fully approved by users!
  • The ST100 mountain bike is suitable for both men and women. Carefully designed down to the smallest detail, with a noticeable slope on the top tube, with a wide range of sizes (XS: 4'9" to XL: 6'7"), the CGF frame of the ST100 is light, comfortable, and very versatile. To make the most of the improved comfort, the women of the Rockrider team recommend the 500 Women's Sport saddle, which is adapted to women's morphology.
  • Several sizes available: S: between 5' and 5'5" M: between 5'5" and 5'9" L: between 5'9" and 6'
  • Compatible Accessories BASE KICKSTAND 500 ADULT 26-28 (Model Code 8302792) BASE AND SEAT KICKSTAND 520 CN (Model Code 8401256) SEAT POST CARRIER 500 (Model Code 8387783) ST MUDGUARD SET CN (Model Code 8550005) FLASH MTB FRONT MUDGUARD - BLACK (Model Code 8327776) BABY SEAT 100 FRAME (Model Code 8486913)
  • Lifetime warranty on manufacturing defects for all metal frames, rigid forks, stems, and handlebars 5-year warranty on manufacturing defects for carbon frames and forks 2-year warranty on manufacturing defects for all other parts *Excludes damages arising from normal wear and tear, misuse, negligence, and unauthorized modifications


Manufacturer Part Number
Assembled Product Dimensions (L x W x H)
72.05 x 42.91 x 7.28 Inches