Skip to product information
1 of 4

eMotionBikes

Wisper Tailwind Trail Crossbar Electric Bike

Wisper Tailwind Trail Crossbar Electric Bike

Regular price £2,249.00 GBP
Regular price Sale price £2,249.00 GBP
Sale Sold out
Tax included.
Colour
Battery Size

In stock

  • Warranty Included
  • Free Fast Delivery
  • Best Price Guarantee
Discover the Wisper Tailwind Trail Crossbar—an electric bike built for power and adventure. Whether you're navigating off-road trails or city streets, its robust frame guarantees stability, while the electric assist ensures effortless riding. Experience comfort and control through its integrated technology. Ready to elevate your cycling journey? The Wisper Tailwind Trail Crossbar is your gateway to thrilling rides, no matter where your path leads. 
View full details

SPECIFICATION

KEY FEATURES

Motor:  Wisper High efficiency, 250W hi torque brushless motor, easily ridden past 15.5mph with almost no motor drag

Throttle:  Standard: Thumb throttle to 4mph (6km/h) and Thumb throttle to 15.5mph (25km/h) when pedalling. Full throttle option available.

Throttle only range:  Using your Wisper bike on throttle only will reduce your range by up to 30%. If your bike has been upgraded so it works on the throttle only, we still suggest pedalling when you are able to do so. Use the throttle only function when you need to rest or to help you pull away when setting off.

Battery:  Lithium standard slimline 360Wh or long range 540Wh Lithium

Max Range 360Wh: 50 miles (80km)
Max Range 540Wh: 70 miles (110km)

Controls:  Wisper Back lit LCD display with remote controls

Weight:  360Wh: 19Kg  540Wh: 20kg

Frame:  Wisper Tailwind 6061 alloy hand welded, custom butted tubing / tapered headtube / BB68 / Internal cable routing / replaceable hanger

Mudguards: Available

Frame Size:  19″ 48cm

Colour:  Black or Stone

Fork: RockShox Judy 100mm travel with remote lock out

Chain-set:  Black alloy 48T chainring Crank length 170mm

Rear Derailleur:  Shimano Alivio Shadow design 9 speed derailleur

Shifter:  Shimano Alivio 9 speed M3100 rapidfire shifter

Cassette:  Shimano CS HG400 11-34T

Chain:  KMC X9 rust resist 9 speed

Stem:  Alloy 6061 oversized 31.8mm / 1 1/8″  6° angle

Handlebar:  Alloy 6061 Flat  9°  740mm

Seat post:  Black anodised alloy 30.9 x 350mm

Saddle:  Wisper Comfort

Brakes:  Wisper Hydraulic 180mm disc front and 160mm disc rear

Wheels:  Alloy black anodised double wall 27.5” x 1.24″ (31.4mm)

Tyres: Goodyear Peak 27.5×2.25

Max Load: including luggage 21 Stone / 135kg

POWER DELIVERY OPTIONS

Cadence/speed sensors

Cadence sensors turn the power on when pedals are turned forward and turn the power off when pedaling stops.

On our Traditional Range of bikes it will take between ¼ and ½ of a complete revolution of the pedals before the power is turned on.  The Wayfarer and Tailwind will activate faster due to improved hardware.
Note: Power is available immediately on all our ranges by simply twisting the throttle or activating the thumb throttle.

The magnetic disc is a part of the cadence sensor system and sits on the inside of the right hand crank by the bottom bracket axle. It holds several magnets on it’s circumference which, when they pass a sensor on the frame tells the bike when the pedals are being turned forward, at which point the power switches on. When a rider stops pedaling, the magnets stop passing the sensor and the power turns off.

Cadence sensor bikes require three magnets to pass the sensor in the correct order (pedals turning forward) before the power is switched on, the magnets must keep passing by the sensor or the power will turn off again. If the pedals stop turning, the bike will recognise this in a small fraction of a second and the power will turn off, hence the reason we do not need or use brake cut outs.

Torque sensors

Torque sensors recognise when and how much pressure is being put onto either pedal. Power will increase as the pressure on the pedals increases.

Power is available immediately pressure is put onto either pedal.

On Wisper bikes fitted with the Torque Power Pack, the torque and cadence sensors are housed inside the bottom bracket where the pedals are connected through the bike frame.

The Wisper Torque system works in a completely different manner to the the cadence sensor. Through the torque sensor the system measures the pressure a rider is putting onto the pedals. Pressure on the pedals turns the power on and the torque sensor reads the amount of pressure being exerted. The more pressure a rider puts onto the pedals the more power will be demanded from the motor.

So… if the bike is starting from standstill, encounters a hill, a strong headwind or if the bike is heavily laden, the torque sensor will recognise that more pressure is being put onto the pedals and the bike will offer more powered assistance. It’s very simple and very clever!

Either the left or right pedal will activate the torque sensor.

FULL THROTTLE OPTION

  1. Full Throttle eBikes offer a quick, eco friendly and cost efficient option for city commuters at a time when everyone is looking to save on rising fuel and transport costs.
  2. Full Throttle eBikes offer commuters better control and enhanced safety when moving slowly in traffic.
  3. Full throttle eBikes offer immediate power when accelerating especially useful at traffic lights or on hills.
  4. Full Throttle eBikes allow a rider to “take a breather” and cool down from time to time during a journey, particularly useful when commuting in hot weather.
  5. Full Throttle eBikes make cycling even more inclusive, enabling those of us with for example impaired movement to enjoy the benefits and freedom eBikes bring.

Fully Legal in the UK

Continuing our journey of pro-active leadership, innovation and progression within the e-bike industry we are proud to be able to offer fully UK legal, full throttle eBikes that will power our bikes up to 15.5mph without pedalling.

As well as making our bikes safer and more easily controlled at low speeds, offering faster acceleration from stand still, Wisper full throttle electric bicycles make cycling even more inclusive than ordinary eBikes, enabling those that need a little extra help when discovering, or returning to the joys and freedom cycling offers.

How It Works

Once we receive your order for a Wisper full throttle bike we arrange to have your bike tested by the DVSA and Type Approved as an L1e in the category 250W LPM (250Watt Low Powered) Moped.  This can take between 2 and 8 weeks as the bike has to be taken to a specially approved MVSA centre for the Type Approval tests to be carried out.  The tests are to make sure our standard eBike is safe and complies to current EAPC (Electrically Assisted Pedal Cycle) regulations.  Once these tests have been completed we are presented with a British National Type Approval, Minister’s Approval Certificate bearing your bike’s frame number, this ensures the certificate can only be used in conjunction with your specific Wisper bike. The certificate must be kept in a safe place just like an MOT certificate although we and the Driver and Vehicle Standards Agency will keep a record of your Bike’s Type Approval.

Unlike an MOT Certificate, the Type Approval Certificate lasts for the lifetime of the bike and does not need to be renewed.

Full throttle eBikes will continue to work in exactly the same way a standard eBike works when the throttle is not used. The rider only uses the throttle when needed, it will not effect any other standard EAPC function.

Exclusions

To obtain Type Approval bikes must be fitted with front and rear lights operated together on one switch. Because the Tailwind Trail, Tailwind City and Wayfarer Mountain do not have lights these bikes cannot yet be Type Approved.  We are working on a solution and hope to offer these bikes with a full throttle by mid 2023.

The Regulations

L1e electric bikes are a sub-group of Low Powered Moped that meets the criteria laid down in the Electrically Assisted Pedal Cycle Regulations 1983 (SI 1983 No. 1168) as amended by SI 2015 No. 24. The requirements are that the vehicle:

  1. Be fitted with pedals by means of which it is capable of being propelled
  2. Be fitted with no motor other than an electric motor, which has a maximum continuous rated power, which does not exceed 250 watts and cannot propel the vehicle when it is travelling at more than 15.5 mph

In essence, our bikes, when Type Approved, can be ridden legally on roads and private land within the UK at speeds of up to 15.5mph using just the throttle.

WARRANTY

Wisper Bikes Extended Warranty

Bicycle and Electrical Components… Two Years

  1. All bicycle components, excluding brake pads, bearings, discs, tyres and other components liable to wear during normal use.
  2. Electrical components, including controller, LCD display, speed sensor, battery, motor, lights and battery charger.

Battery… Two Years

  1. Battery Voltage is warranted not to fall by more than 30% within two years after purchase
  2. Your battery Warranty will be void if you leave it fully discharged for more than 12 hours.
  3. Your battery Warranty will be void if any attempt is made to open the battery case, unless authorised in writing by an officer of Amps Electric Bikes Ltd.
  4. You must only use a Wisper Charger to charge your battery. Using a non Wisper branded charger or one not supplied directly from Amps Electric bikes or a bone fide Wisper distributor will void your Warranty and may cause a fire.

Frames… Five Years

  1. Wisper alloy frames are warranted against failure for five years. The frame does not include bearings or other parts that become worn during use. The rack, front forks and other fixings or components fitted to the frame are not considered as a part of the frame in this warranty. See 1. above for the warranty details on Bicycle and Electrical Components.
    Damage to the paintwork is excluded.
  2. Wisper carbon frames are warranted against failure for two years. The frame does not include any bearings or other parts that become worn during use. The rack, front forks and other fixings or components fitted to the frame are not considered as a part of the frame in this warranty. See 1. above for the warranty details on Bicycle and Electrical Components.
    Damage to the paintwork is excluded.
  3. Height limit marks on the seat post must be strictly adhered to, if there is no mark on the seat post contact Wisper Support for advice. Fames damaged due to the seat post being used too high will not be covered under our limited Warranty.

Exceptions to the Warranty

  1. Consumable items such as tyres, inner tubes, chains, chain wheels, sprockets, brake pads, bearings, handlebar grips or cables.
  2. Corrosion, rust, hairline cracks in paint, chips in the paint, water damage, the results of fatigue and any damage, failure or loss caused by accident, misuse, abuse or theft.
  3. Failure or damage due to poor care and maintenance, overloading with excessive weight, not observing torque restrictions and limit mark on seat post, towing, incorrect assembly and modifications to the bike, mounting and remounting of accessories.
  4. Damage resulting from use in competitions, jumping or other types of extreme use.

DELIVERY

Free delivery 2-5 working days

RETURNS

14 Days free returns policy. Please view our returns policy here