Speedfox AMP FOUR

The Story

Who needs a city to socialise when you’ve got trails to shred?

“I think e-MTBing came along at the right time for us, as we never wanted a conventional hobby and had struggled to find much enjoyment in regular riding,” explains Lisa, over the excited yells of Denise and Michelle in the background. The women come to a halt behind her, their hair windswept around their faces, their shouts and smiles testifying to the amazing descent they’ve just come down. “Exactly,” interjects Denise, “but it took a while to find this thrill. We get such a kick when we go out on our Speedfox AMPs, which I think is what was missing before. When we first went riding a few years ago, it felt more like a chore.”

The three women are visibly stoked. Michelle speaks: “I mean, look at us now, this proves why. And in a minute we'll be on that climb over there too. Pedal, peak, repeat.” They laugh, get out their phones and open up the map. On this particular ride mission, they're decided to go ‘peak bagging’, so where's their next summit going to be?

In detail


Big Wheel Concept (BWC)
E-specific Advanced Pivot System
Twin Hollow-core Technology
Integrated Speed Sensor
E-Specific Geo Concept

Big Wheel Concept (BWC)

Purpose-built 29er geometry and cockpit designs mean our 29" bikes are nimble, stable, and incredibly efficient.

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E-specific Advanced Pivot System

An efficient, plush suspension system with an e-MTB tune that blends your power with that of the bike.

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Twin Hollow-core Technology

Hides the battery pack in the downtube while supporting a stiff front triangle.

Integrated Speed Sensor

Hidden in the rearstay and disc for a clean look and accurate speed measurement.

E-Specific Geo Concept

Adjusted to the needs of an e-mountainbiker, to provide the full all-mountain experience.

Technical Details

  • SKU

  • Frame

    Speedfox AMP - Advanced Pivot System, 12 x 148mm Thru-axle, 130mm Travel
  • Tubing

    Al-13 Triple-butted aluminum, integrated battery pack
  • Drive Unit

    Shimano STEPS MTB E-7000, 250W, 60Nm output
  • Battery Pack

    Shimano STEPS MTB E-8020, 500Wh, integrated
  • Fork

    RockShox Revelation RC, E-MTB, 130mm
  • Rear Shock

    RockShox Monarch RT
  • Gears

  • Chainwheel

    Shimano FC-E8000, 34T
  • Cassette

    Shimano SLX, 11-46T
  • Chain

    Shimano CN-HG701
  • Rear Derailleur

    Shimano XT, Shadow Plus
  • Shifters

    Shimano SLX
  • Brakes

    Shimano SLX (200/200mm) *
  • Handlebar

    BMC MFB 03 750mm
  • Stem

    BMC MSM 03
  • Seatpost

    X-Fusion Manic 150mm, 1x remote lever *
  • Saddle

    WTB Silverado Comp 142
  • Hubs

    Formula DC-7131/ EHL-148S
  • Rims

    Alex MD30 **
  • Tires

    Maxxis Forekaster TR/ EXO, 2.35
  • Infos

    – Seatpost drop adjusted for some sizes – Tubeless rim strip installed, valve included
  • Weight (Kg)

  • Frame Material


Size S M L
Base Bar Drop Flat Cockpit MM N/A N/A N/A
Top Tube MM 572 619 648
Wheelbase MM 1174 1202 1231.16
Seat Angle 74 74 74
Seatpost Drop MM 125 150 150
Seatpost Length MM N/A N/A N/A
Stack MM 598 605 619
Trail MM 107 107 107
Rider Height CM <170 170-185 >180
BB Height MM N/A N/A N/A
Rear Center MM 450 450 450
Pad Reach V Cockpit MM N/A N/A N/A
Reach MM 416 445 470
Pad Stack V Cockpit MM N/A N/A N/A
Head Tube MM 101 103 112
Head Angle 66 66 66
BB Drop MM 33 35 38
Pad Stack Flat Cockpit MM N/A N/A N/A
Stem Length MM 60 60 70
Saddle Height Range N/A N/A N/A
Seat Tube MM 400 440 480
Stem Angle +/-6 +/-6 +/-6
Post Offset MM N/A N/A N/A
Rear Travel 130 130 130
Crank Length MM 165 165 170
Fork Rake MM 51 51 51
Front Center MM 726 752 782.16
Pad Reach Flat Cockpit MM N/A N/A N/A
Base Bar Drop V Cockpit MM N/A N/A N/A
Base Bar Reach V Cockpit MM N/A N/A N/A
Fork Length MM 541 541 541
Bar Rise MM 4 4 4
Base Bar Reach Flat Cockpit MM N/A N/A N/A
Bar Width MM 750 750 750
Bar Reach MM N/A N/A N/A
Bar Drop MM N/A N/A N/A
Backsweep 9 9 9