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Kalkhoff Tasman i8

  • Frame type


  • Impulse Evo Next 250w Motor

  • Impulse Evo Smart Compact display with navigation app connection

  • 36V 17.5Ah high capacity Impulse Evo Next Li-ion battery

  • Speedlifter: Tool-free adjustment of handlebar height

  • Magura HS11, hydraulic rim brakes

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The Tasman has been a best seller for many years and this year's model has been upgraded with Kalkhoff's new Impulse Evo Next centre motor with a 36 volt 17.5Ah battery that gives up to 125 miles range and connects with your phone to allow Smart Navigation previously only available on premium models like the Integrale and Include.

It's superbly well-equipped in every way with 8-speed Shimano Nexus Hub gears, Magura HS11 hydraulic disc brakes, front and rear lights, new illuminated handlebar controls, puncture-resistant tyres, speed-lifter handlebars, integrated mudguards, extra comfortable saddle and suspension.

Kalkhoff Impulse Evo Motor

IMPULSE EVO NEXT The newcomer to the high-end mid-range segment: featuring the familiar Impulse Evo motor and new 17.5 Ah batteries, the Impulse Evo Next system satisfies the most discerning customer's requirements. Just like the top-of-the-range Include and Integrale models, its standard features include a display with a Bluetooth interface and USB charging socket, as well as the free navigation app.
Enhanced performance because the motor is the most efficient yet
Stronger gears, designed for a huge maximum torque of 84 Nm. The motor's background noise has been reduced by 50%.
An extra pedalling cadence sensor built into the motor gives even more sensitive control over the power assistance level.
Faster, high bandwidth data transmission via the automotive standard CAN Bus communication system

Shift Assist is a genuine innovation - every time you change up or down a gear, power drops away for a matter of milliseconds for optimal gear shifting. This does a number of great things - it extends your gears mechanical lifetime, feels satisfyingly natural and makes for a smoother application of all that power. They had to invent a little electromechanical gadget to detect gear changes that worked with the motor. They succeeded and the result brings a new feeling of confident power to riding a Kalkhoff electric bike.

Magura's hydraulic brakes piston design makes braking easy, well-modulated and reliable over time. There are no cables to stretch, the whole surface of the brake pad is applied to the rim (protecting both), pads last for ages and braking is strong and sure-footed. Looks cool too, with a strong arch and neat braking assembly tucked against the forks.



Front and rear lights Powered from the battery, the lights on this and all Kalkhoff bikes are excellent. Few bikes on sale in the UK benefit from front and rear illumination of this quality and utility. 

The Blueline 30 front lamp casts 30 lux of cool, bright LED light forward, enough to make night rides across the park something to enjoy rather than endure.

The winning features

  • Multifunction LCD console - Speed, Charge, Assistance Level, Total Miles, Trip Miles
  • Handlebar-mounted control - illuminated with Walk Assist button, on/off, power controls and options.
  • Magnesium alloy forks
  • High-end Nexus 8-speed gears
  • 612 Wh Lithium tri-metal battery
  • 1100 cycle battery lifetime, more than twice that of the Bosch battery. So 50% extra capacity and 120% extra lifespan.
  • Schwalbe Marathon Puncture-Resistant Tyres

Ratings and Reviews

Impulse cycling

by from Bristol on

I've always enjoyed participating in sport but in recent years I've had to stop playing golf and running as my arthritis was just getting too painful. I was then looking for another outdoor activity where I could enjoy myself and keep up a reasonable level of fitness for someone 65+

I started researching electric bikes and came across the 50cycles store in Bristol quite by chance while I was out shopping. I spoke to the store manager Anthony Douglas who was very helpful and arranged for me to have a test ride. From that moment I was hooked and came back into the store and ordered a Kalkhoff Tasman Impulse electric bike.

I've now clocked up 400 miles in 4 months and have absolutely loved my new found freedom. I can now effortlessly climb hills and I can be far more adventurous in cycling longer routes on our local cycle paths and trails with very little effort. I also appreciate the excellent build quality of a Kalkhoff bike and would thoroughly recommend one to anyone who just wants to go out on a bike ride and enjoy our countryside in comfort.

Back cycling again and superb city commuter bike

by from Cardiff, Wales on

Bought bike online after a phone discussion with Anthony who confirmed that a hub geared bike and something like the Tasman would suit my city cycling commute. The bike arrived along ready to go and just needed to charge battery fully. First commute to work was just amazing and I arrived with a big smile on my face. It took 55 miles to run the battery down for the first time on full power mode. Overall, I think it's the best thing I ever bought and it's great to get back on a bike for communing, but without all the sweat and bother if you don't want it - just power up or down with the assist mode. Looking forward to many more miles on what is a real quality piece of kit.

Utterly brilliant

by from Bristol on

Just before Christmas I got my new Kalkhoff Tasman Impulse bike from your Bristol electric bike shop. For years I have wanted to have an electric bike and now I am finally the proud owner of one and wished I had done it years ago. It is fantastic!!!! 

I have been riding to several villages on it. We live in the country and always had to go by car. Now, with my panniers on the back and a backpack I can go shopping and the battery has only used up a few stripes so far. I am quite old, but feel as if I am a young girl again, rosy cheeks, exercise and lungfuls of fresh air! It is an amazing piece of machinery and the biking is fun , without any strain. Utterly brilliant.

Technical Specifications

Frame Impulse Evo next, alloy
Motor Impulse Evo, 36 V / 250 W, with shift sensor Technology
Display Impulse Evo Smart Compact, with bluetooth and USB charging socket
Battery iNext Li-Ion 36 V
Brakes Magura HS11, hydraulic rim brake
Chain guard Next, Revolver
Gear shifter Shimano Nexus
Crank set Concept
Gear ratio front: 38, rear: 18
Handlebar Concept Comfort
Stem Concept EX
Saddle Selle Bassano Feel GT
Seat post Patent, 27.2x 300 mm, suspension
Front hub Concept, QR
Rear hub Shimano Nexus, 8 speed
Wheel rims Concept
Tyres 26": Schwalbe Energizer Life, 47-559; 28": Schwalbe Energizer Life, 40-622
Headlights AXA Blueline30, LED
Luggage carrier Racktime system, tour
Bike stand rear stand, alloy
Protective guard plastic, with edge protector
Lock AXA Defender, removeable key
Pedal Comfort alloy, with anti slip protection and reflector
Battery capacity  17,5 Ah (621 Wh)
Range 125 miles under test conditions.

Quality Electric Bikes Supplier

First Class Service

We specialise in providing the best electric bikes and the smartest cycling accessories in the UK. We also offer the most responsive and knowledgeable after sales service.

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Finance Options Available

All our new bikes are available to buy with interest-free finance (typical 0% APR). You can ease the cost of ownership by paying a deposit and choosing one of our finance packages when checking out.

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Book a Test Ride

Sometimes it takes a test ride to understand what an e-bike can do for you. Please visit one of our showrooms or take a test ride with a local Kalkhoff owner who's also a demonstrator

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