Whistle B-Rush C4.1 Carbon

Whistle B-Rush C4.1 - Ride to the top and quickly attack the most technical descents at maximum speed

The B-Rush C4.1 is built for competitions but thanks to the sturdy suspensions, it's agile and fun even on trails near home. Benefit from a finely balanced system that delivers maximum performance for a sporty riding style.

New frontiers, new goals to be achieved, new opportunities. A carbon frame designed to maintain the rigidity that distinguishes this material, but designed to withstand high peak power, generated both by the rider and the drive unit. A frame designed to combine muscular and electrical performance in a seamless way.

Lighter and stiffer
The monocoque frame is made from a single mold, there are no joints between the pipes, such as gluing or bandages or welds (aluminum), where the efforts of the structure are concentrated.Advantage par excellence: weight. Processing in a single largemold allows the structure to be treated as if it were a single tube.The main value of carbon fiber is that it can be oriented so as to provide stiffness or flexibility in the critical points of the frame according to the design needs. This allows you to create frames that are very reactive but also capable of absorbing vibrations and at the same time saving material where it is not needed, thus reducing weight.

Mechanical Specs

  • Frame: Full Carbon 29, Toray T700, integrated battery, tapered, Rear travel 150 mm, 12x148 mm E-Thru
  • Fork: Rock Shox 35 Gold RL, 150 mm, Maxle Lite 15x110 mm, DebonAir, Motion Control, Tapered, Lockout, E-Bike
  • Rear shock: Rock Shox Deluxe Select R, DebonAir, 230x65 mm
  • Headset: FSA No.57B tapered 1 1/2
  • Crankset: FSA, 34T
  • Rear derailleur: Shimano CS-M6100 12s 10/51
  • Shifter levers: Shimano Deore SL-M6100 Rapidfire-Plus, 12s
  • Brakes: Shimano BR-MT420, Four piston, Rotor SM-RT30 203 mm/203 mm
  • Cassette: Shimano CS-M6100 12s 10/51
  • Front hub: Shimano Alivio MT400, 15x110, CL, 32h
  • Rear hub: Shimano Alivio MT410, 12x148, CL, MicroSpline, 32h
  • Rims: Radiale X30, 30x622, eBike ready, Asymmetric
  • Pedals: Alu MTB Full
  • Stem: Alu Oversize, 35 mm, Bar bore 31,8 mm
  • Handlebar: Rise Alu Oversize, 780 mm
  • Seatpost: Dropper DP01, 31,6 mm, remote
  • Saddle: Whistle Performance
  • Tyres: Schwalbe Nobby Nic, Performance, Addix, 29x2,60"

Electrical Specs

  • Motor: Performance CX 36 V, 250 W
  • Max Torque: 85 Nm
  • Sensor type: Torque
  • Battery: Powertube 500 Horizontal, frametype
  • Charger type: 2 A
  • Charge time: Up to 7,5 hours
  • Max assisted speed: 25 km/h
  • Display: PURION
  • Power: Eco: 60 %, Tour: 140 %, EMTB: 140 / 340 %, Turbo: 340 %