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Radical Bicycle Co

Thundercat 5.9 (E-Bike) - Enduro - Frame/Motor/Battery Only

Thundercat 5.9 (E-Bike) - Enduro - Frame/Motor/Battery Only

Regular price £2,645.00 GBP
Regular price £2,645.00 GBP Sale price £2,645.00 GBP
Sale Sold out
Tax included.

Orders due to open 2025!

TUNDERCAT - THUNDERCHARGED 

Introducing the Thundercat: The lightweight electric mountain bike for when you want to shred trails but still show up to brunch with energy left to judge people.

This beast isn’t just a bike—it’s your personal off-road accomplice, ready to tear up dirt and leave everyone else eating your dust (literally). Powered by the Bafang M820 that laughs in the face of hills, the Thundercat purrs through the toughest terrains, so you can focus on looking good while pretending it was “no big deal.”

With a frame as tough as your questionable life choices and a battery life that outlasts your last relationship, the Thundercat is the answer to the one question you’ve been avoiding: How do I ride harder without breaking a sweat?

Oh, and that 4-bar linkage? Yeah, it’s smoother than your latest DM slides. This isn’t just a bike—it’s a lifestyle choice. One that says, “Yeah, I ride electric, but I’m still tougher than you.”

The Thundercat: For when you want to dominate the outdoors, but not enough to give up your afternoon nap.

 

KEY FEATURES

  • Wheel Size: 29' or Mullet
  • Travel: 150mm Rear, 160mm Front
  • Motor: Custom tuned Bafang M820 43v 250w
  • Battery: Bafang 410w 43v integrated
  • Display: Full colour HD display
  • Dropouts: Boost spacing with UDH dropouts
  • Tire Clearance: 2.6inch
  • Routing: Internal routing through the headset (supplied)
  • Shock sizing: 185x55 trunnion mount (upper hardware included, M8x22 lower required)
  • Seatpost: 31.6mm, recommended 170mm drop
  • Frame warranty: 5 years
  • Motor/Battery warranty: as per manufacture 

We also offer full UK support on spares/repairs/serviceable items for frame, motor, battery and control units.

What's included in the price?

  • Thundercat frame
  • Headset
  • Motor
  • Battery
  • Control unit
  • Display unit
  • Speed sensor
  • UDH dropout
  • Axle 
  • Seatclamp
  • Upper shock mounting
  • Associate cabling
  • Charger
  • Chainring (32T)
  • Crank Arms
  • Pre-routed & assembled (Gears, dropper and brake hoses* pre-installed).

Customer needs to confirm brake hose requirements



THE TINY TERROR

 

The Thundercat is equipped with Bafangs latest motor; the M820… custom tuned by ourselves

Bafang, seeing significant growth in the West/Europe amongst mainstream brands, has actually been one of the longest standing pioneers in e-mobility and e-drive systems since 2003. This is their latest creation; a tiny 250W power house motor equipped to a 410Wh battery, kicking out a whopping 75nm of torque, making it one of the strongest yet lightweight mid drive motors on the market.

The Thundercat is equipped with a custom tuned motor, where we have increased the power from 5-15% across each mode to not just improve power output, but give a more linear increase in power as you move through each mode. This will help you make the most of the lower output power modes on a more regular basis.

The M820 is also equipped with one of the most advance, high quality colour screens available, making the riders experience all the more enjoyable, with a crystal clear, easy to use interface.

We have been fortunate enough to be one of the first brands to thoroughly test this motor over a 12 month period before moving into production, where it saw everything our snotty British climate could throw at it. During this, we were able to pull together some extensive real world figures on the range when used as a PROPER BICYCLE.

Real World range on a Medium frame, 21kg (‘burly’) build, 87kg rider across mostly enduro style mixed terrain:

- Eco Mode: 35km+

- Mixed modes: 15km to 35km

- BOOST BOOST BOOST: Up to 15km

 

GEOMETRY & SIZING

 

  Short    Regular   Long
Reach 430mm 455mm 480mm
Top Tube Horizontal 572mm 598mm 625mm
Stack 624mm 619mm 638mm
Wheelbase 1206mm 1233mm 1262mm
Chainstay Length 457mm 457mm 457mm
Front Centre 758mm 783mm 813mm
BB Drop 30mm 30mm 30mm
BB Height 335mm 335mm 335mm
Seat Tube Angle 76.5° 76.5° 76.5°
Head Tube Angle 64° 64° 64°
Seat Tube Length 390mm 420mm 450mm
Headtube Length 105mm 110mm 120mm
Standover 782mm 801mm 825mm
Fork Rake 44mm 44mm 44mm
Fork ATC 572mm 572mm 572mm
Trail 128mm 128mm 128mm

 

ADVANCE CARBON MANUFACTURING

Did a small bespoke steel bike brand just release a carbon Ebike? PHAH…. THE BLASPHEMY!

Yes, it’s true, we went so far right on this one we’re still trying to bring the rear end back in line… The Thundercat brings a whole new edge to our brand, and allows us to offer an alternative to a market that we just would not be able to normally reach.

To ensure the frame could be kept as light as possible without compromising the integrity, the Thundercat is manufactured using one-piece latex 3D mandrel and moulding out of T700 and T800 carbon by Light Carbon technologies in Xiamen, and is shared with a select number of other smaller brands. Thanks to this process, the strength of the frame & materials is increased by up to 30%.

The frame is then finished with Endruo Max bearings to ensure that smooth ride keeps silky between the sheets for the long term.

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