Thunderbolt

An agile, playful XC bike that loves punchy, technical climbs and flowy singletrack descents.

When XC gets rowdy, the agile and playful Thunderbolt shines. Standing on 120mm of travel and equipped with 27.5” wheels, the Thunderbolt delivers a great mix of intuitive XC capabilities and pure playful trail fun.

Rocky Mountain's entire development team unanimously agreed on the need for a fun XC bike that stands on the shoulders of dedicated XC race bikes. By understanding attributes of a race bike, we tested and perfected the numbers to arrive at geometry that lends a more playful feeling to riding cross-country. We were able to design a short 426mm rear end on the Thunderbolt, tucking the 27.5” wheel in close to the rider for lots of maneuverability and agility. At the same time, the top tube has been lengthened from traditional Rocky Mountain designs to accommodate for today's shorter stems and wider bars. Our Engineers and test-riders like Thomas Vanderham experimented tirelessly to arrive at the bike's 68.5° headtube angle, balancing the unique handling properties of both XC and trail riding styles.

"The Thunderbolt is my kind of XC bike. It's got a natural feel and tackles the climbs exceptionally well. On the descents it provides the kind of small bump sensitivity usually reserved for longer travel bikes.” -Thomas Vanderham

Frame Geometry
xs
sm
md
lg
xl
  • TTH. Top Tube Length - HORZ (mm)
  • 540
    565
    590
    615
    645
  • TTL. Top Tube length - Actual (mm)
  • N/A
    N/A
    N/A
    N/A
    N/A
  • HTA. Head Tube Angle (deg)
  • 68.5
    68.5
    68.5
    68.5
    68.5
  • HTL. Head Tube length (mm)
  • 100
    110
    120
    130
    145
  • STA. Seat Tube Angle - Effective (deg)
  • 74.5
    74.5
    74.5
    74.5
    74.5
  • STL. Seat Tube length (mm)
  • 381
    419
    457
    483
    521
  • CSL. Chainstay Length (mm)
  • 426
    426
    426
    426
    426
  • BBD. Bottom bracket drop (mm)
  • 20
    20
    20
    20
    20
  • BBH. Bottom bracket height (mm)
  • 331
    331
    331
    331
    331
  • R. Reach (mm)
  • 381
    404
    426
    449
    475
  • S. Stack (mm)
  • 573
    582
    591
    601
    615
  • SH. Standover Height (mm)
  • 715
    715
    715
    715
    715
  • WB. Wheelbase (mm)
  • 1072
    1098
    1124
    1150
    1181
  • FC. Front-Centre (mm)
  • N/A
    N/A
    N/A
    N/A
    N/A
  • FO. Fork Offset ()
  • N/A
    N/A
    N/A
    N/A
    N/A

* Not all sizes available in all markets