Kalkhoff Integrale S11 Review

Kalkhoff Integrale S11 Electric Bike Review
Kalkhoff Integrale S11
Kalkhoff Integrale S11 Impulse Evo 3 Mid Drive Motor Belt Drive
Kalkhoff Integrale S11 Impulse Battery 36v 16 75ah
Kalkhoff Integrale S11 Impulse 3 Evo Smart Display
Kalkhoff Integrale S11 Concept Ex Twin Headlight 100 Lux
Kalkhoff Integrale S11 Racktime Rear Rack Bm Toplight Line Brake Light
Kalkhoff Integrale S11 Shimano Nexus Internally Geared Hub
Kalkhoff Integrale S11 Adjustable Kickstand Magura Mt5 Brakes
Kalkhoff Integrale S11 Battery Charger Energybus Rosenberger Interface
Kalkhoff Integrale S11 Electric Bike Review
Kalkhoff Integrale S11
Kalkhoff Integrale S11 Impulse Evo 3 Mid Drive Motor Belt Drive
Kalkhoff Integrale S11 Impulse Battery 36v 16 75ah
Kalkhoff Integrale S11 Impulse 3 Evo Smart Display
Kalkhoff Integrale S11 Concept Ex Twin Headlight 100 Lux
Kalkhoff Integrale S11 Racktime Rear Rack Bm Toplight Line Brake Light
Kalkhoff Integrale S11 Shimano Nexus Internally Geared Hub
Kalkhoff Integrale S11 Adjustable Kickstand Magura Mt5 Brakes
Kalkhoff Integrale S11 Battery Charger Energybus Rosenberger Interface


  • A premium speed pedelec designed for hassle free, reliable and quiet commuting with a two year warranty, available in four frame sizes for improved fit, adjustable stem
  • The Gates carbon belt drive is near-silent and stays centered with CDX tracking technology, an 11 speed internally geared hub requires less maintenance and is less vulnerable than a derailleur if the bike tips
  • You get a sleek rear rack, integrated lights and fenders, a battery that can be charged on or off the frame and one of the deepest interfaces I've seen with lots of adjustability
  • The battery rotates in vs. clicking straight down and can get a little tight at times, the display is rather large and isn't removable, the bike costs a lot

Video Review





Integrale S11


$5,699 USD

Body Position:


Suggested Use:

Urban, Commuting

Electric Bike Class:

Speed Pedelec (Class 3)
Learn more about Ebike classes


2 Year Comprehensive


United States

Model Year:


Bicycle Details

Total Weight:

56.5 lbs (25.62 kg)

Battery Weight:

6.9 lbs (3.12 kg)

Motor Weight:

8.4 lbs (3.81 kg)

Frame Material:

Aluminum Alloy

Frame Sizes:

18.7 in (47.49 cm)19.69 in (50.01 cm)21.65 in (54.99 cm)23.62 in (59.99 cm)

Geometry Measurements:

32.5" Stand Over Height

Frame Types:


Frame Colors:

Matte Black with Red Accents

Frame Fork Details:

RST Pulse Air, Magnesium, 60 mm Travel with Lockout Adjust, 15 mm Floating Axle

Frame Rear Details:

11 mm Axle with Bolts

Attachment Points:

Fender Bosses, Rear Rack Bosses, Bottle Cage Bosses

Gearing Details:

11 Speed 1x1 Shimano Nexus Internally Geared Hub, Gear Ration Front 46, Rear 22

Shifter Details:

Shimano Alfine Triggers on Right


Miranda, Aluminum Alloy, Black


Plastic Platform with Rubber Tread


Tapered 1-1/8"


Concept EX Integrated, Adjustable Angle


Concept EX Low-Riser (Almost Flat), 27" Length

Brake Details:

Magura MT5 Speed Hydraulic Disc, 180 mm Rotor in Front and 160 mm Rotor in Rear, 4 Piston Calipers, Magura MT5 Levers with Brake Light Bright Activation


Ergon Ergonomic Locking


Concept Integrale

Seat Post:

Aluminum Alloy, Concept EX

Seat Post Length:

350 mm

Seat Post Diameter:

31.6 mm


Concept EX Alloy, Black


15G Stainless Steel, Black

Tire Brand:

Schwalbe Big Ben, 28" x 2"

Wheel Sizes:

28 in (71.12cm)

Tire Details:

Performance Line RaceGuard, LiteSkin, Reflective Sidewall Stripe, 35-70 PSI

Tube Details:

Presta Valve


Adjustable Length Kickstand, Full Length Wide Alloy Fenders, Racktime Alloy Rear Rack with 15 kg Max Weight, Integrated B&M Toplight Line with Parking Delay in Rear, Integrated Concept EX Twin LED Headlight (100 Lux) in Front, Gates Carbon Drive CDX, Alloy Bash Guard


Locking Removable Battery Pack, 1.8 lb 3 Amp Charger

Electronic Details

Motor Brand:

Impulse 3.0 Evo

Motor Type:

Mid-Mounted Geared Motor
Learn more about Ebike motors

Motor Nominal Output:

350 watts

Motor Torque:

100 Newton meters

Battery Brand:


Battery Voltage:

36 volts

Battery Amp Hours:

16.75 ah

Battery Watt Hours:

603 wh

Battery Chemistry:


Charge Time:

6 hours

Estimated Min Range:

55 miles (89 km)

Estimated Max Range:

125 miles (201 km)

Display Type:

Impulse Evo Smart, Fixed, Monochrome Backlit LCD with Adjustable Angle and Bluetooth App Integration for GPS Navigation


Battery Level with Range Estimate, Time, Assist Level (Off, Eco, Sport, Power, Ultra), Speed, Cadence, Odometer, Trip Time, Trip Distance, Trip Max Speed, Trip Average Speed, Tour Distance, Tour Average Speed, Climb Assist Mode, User Profile

Display Accessories:

Backlit Independent Button Pad Near Left Grip

Drive Mode:

Advanced Pedal Assist (Measures Cadence, Pedal Torque and Bicycle Speed, Offers Physical Shift Sensing)

Top Speed:

28 mph (45 kph)

Written Review

The Kalkhoff Integrale S11 is a speed pedelec (capable of 28 mph top speeds, assisted) with an internally geared 11 speed hub. It runs a clean, quiet belt drive instead of a chain and comes outfitted with a sleek rear rack, plastic fenders and a bottle cage mounting point so it’s ready for commuting or a bit of touring. I was impressed with the name brand extras… locking ergonomic grips from Ergon, hydraulic disc brakes from Magura, integrated LED lights from B&M and a light weight air suspension fork from RST. You do pay for these upgrades however and at $5,699 this is not a cheap electric bike.

The first thing I noticed about the Integrale S11 was how nice the frame, fork and battery looked together. Everything is color matched here and the integrated design nearly hides the fact that it’s an ebike. Kalkhoff is using the Impulse 3.0 drive system for this model and the custom battery was designed to rotate in from the side instead of clicking down. This reduces the vertical clearance required to seat and unseat it which makes bumping the pack on the top tube and seat tube less likely. Getting it on and off required a bit of experimentation for me (I approached the bike without any kind of introduction from the team). First you unlock it then pull at the top of the pack from the left side of the frame and it will start tipping out. After doing it once, the process got a lot easier and you can see it in action in the video review above. The one thing I noticed however was that there’s a bit of play even when the pack is securely locked in. I didn’t notice it rattling a lot during my rides but there was a gap along the bottom and perhaps some foam pads or bumpers would help with future designs?

The battery charges using an EnergyBus port that’s magnetic, it can be charged on or off the bike and weighs about seven pounds so removing it will bring the bike down to ~48 lbs total making it easier to lift onto car racks or carry up stairs. The front wheel is removable using quick release but the rear is bolted in, perhaps since it uses an internally geared hub without a chain tensioner. Thankfully, the upgraded Schwalbe tires have a puncture resistant layer. I mentioned lights earlier but the tires also have reflective sidewall stripes keeping you visible from the side. Considering the bike only comes in this dark gray/black color scheme, I’m glad they added those for safety. You can get this bike in four different sizes for optimal fit and it felt stiff and responsive to me during the tests, even at high speed! Instead of using a standard 11 mm skewer up front, Kalkhoff upgraded the axle to 15 mm like you’d find on some mountain bikes. This improves strength and makes the wheel easier to get on when you’re lining up the disc brake rotor in my experience. This, combined with the tapered head tube and diamond frame make the bike feel solid.

While the battery configuration is more range oriented than power, I found the bike to be quite capable when accelerating and climbing… It offers 36 volts and 16.75 amp hours. The motor is rated at 350 watts nominal, but offers a massive 100 Nm of torque! That’s more than almost any other mainstream mid-drive I’ve tested. In practice, it feels similar but that may be due to my lighter weight of ~135 lbs. I had a great time climbing and speeding along on the flats. I had no problem hitting ~28 mph in the ultra setting and noticed the responsiveness of the assist sensors which measure rear wheel speed, pedal speed and pedal torque. Along with that power, you also get sensitivity because this is one of the few e-bikes out there with physical shift sensing. It’s designed to ease off a bit when shifting gears so you don’t end up straining the belt or mechanical shifting mechanisms.

So many of the drive settings can be adjusted with the Impulse 3.0 system, it’s truly versatile and delightful to explore. Whether you want the lights to stay on for a few minutes after you’ve stopped ridding (for safety) or you want to dial up the shift sensing… you can link the display to your mobile phone for GPS enabled turn by turn directions, you can dial in how quickly the motor responds to your pedal input and you can adjust the maximum speed. Note that riding over 20 mph significantly increases air resistance and drag which will cut into your range. If you enjoy the speed and don’t have as far to go, enjoy the zippy Class 3 performance but otherwise, consider dialing it down for maximum range. While I wasn’t super impressed with the large plastic non-removable display panel, I did like the options it presented and that fact that you didn’t need to download an app to access all of them. I love that it had a Micro USB port built into the back for charging your devices on the go and at least it can be angled to reduce glare. All things considered, this is a fantastic bike that’s ready to dominate urban landscapes. It looks great, handles well and comes with an impressive two year comprehensive warranty. Kalkhoff is a leader in the European market where they thoroughly test their frames and final builds. I could see the quality and felt more comfortable at high speed than with some other competing bikes. Big thanks to Kalkhoff for partnering with me for this review.


  • As far as speed pedelecs go, ebikes that can top 20 mph, this one is super streamlined and quiet thanks to its internally geared 11 speed hub and carbon belt drive
  • The belt drive is from Gates, a trusted leader in the space, uses carbon strands for strength and has an alignment strip down the middle so it won’t slip
  • The internally geared Nexus hub isn’t as vulnerable if the bike tips and shouldn’t require as many tuneups as a more traditional derailleur… it can also be shifted at standstill
  • Sleek rack design capable of supporting ~15 kg (~33 lbs), it isn’t as wide or bulky as some other racks I’ve seen but also can’t carry as large a load
  • I love that the bike has integrated lights, they run off the main battery pack for convenience, you don’t have to take them off each time you stop and the rear light is integrated with the rack so it won’t get blocked as easily a seat post lights (jackets can sometimes hang down over that style)
  • 2″ wide Schwalbe Big Ben tires improve comfort, have a puncture protection lining, reflective sidewalls for safety but still roll efficiently thanks to an urban tread, I like that the fenders are wide enough to completely cover them and how good the fenders look
  • High quality physical shift sensing protects the gears when pedaling hard and shifting simultaneously, it’s one of the best designs around
  • Lots of system adjustability here including how quickly the bike responds and how long it continues after you ease off on pedal torque (that’s their climb-assist feature), how much battery is reserved to power the lights if you’re getting low, you can even connect with your phone with Bluetooth for turn by turn GPS feedback or tune down the top speed from 28 mph to 20 mph or lower if you want to optimize range or just improve your own feeling of comfort and safety
  • Quick release on the front wheel for easy maintenance (I would say it helps with transport but the fender is still there and could be vulnerable without the wheel), I like that the axle is upgraded to 15 mm for strength given the higher top speeds here
  • Very sturdy adjustable angle stem to help dial in your body position, ergonomic grips and a suspension fork… consider a 31.6 mm seatpost suspension for even more comfort
  • Excellent weight distribution, the motor and battery are centered and low, in my opinion the weight of the bike is actually fairly low at ~56 lbs given all of the accessories and suspension as well as the large battery… I think the fact that it uses an air fork helps
  • Available in four frame sizes for improved fit, this is important considering that the frame only comes in a high-step design, I love that the managed to squeeze in bottle cage bosses on the seat tube! Consider adding a side entry cage or sturdy folding lock here
  • You can adjust how long the lights stay lit after you park (for safety as you lock the bike) and the rear light activates more brightly when you squeeze the brake levers
  • Solid two year comprehensive warranty, Kalkhoff is part of the Pon Group which also owns Gazelle and Focus, they are a leader in Europe
  • The charger uses the EnergyBus Rosenberger interface standard that sends data and electricity for easier diagnostics at the shop and a safer plug (it’s magnetic and just unclips if you trip over it vs. bending pins and knocking the bike over), it charges at 3 Amps vs. just 2 Amps for most e-bikes I test
  • I love that they included a Micro USB charging port on the back of the display panel! This lets you charge mobile devices like phones or music players and it’s mostly out of the way so you won’t snag your feet or arms while riding the bike
  • The button pad that you use to interact with the display panel on this bike is excellent, it doesn’t take up too much space on the bar, is backlit for easy use in low light conditions and seems very durable – well sealed against water
  • This bike offers excellent torque power with up to 100 Nm output, it should climb easily if you’re in the higher levels of assist and shift gears appropriately
  • This is a completely custom, purpose built electric bike with internally routed cables, matching paint across the frame, battery pack and fork and it just looks great


  • The display is kind of big, clunky and ugly in my opinion… you can’t take it off and the plugs at the back can get squished if you angle it far forward
  • The “rotate in” battery pack is unique and allows the top tube to be lower but can be a little tricky to work with… I also felt like it was a little loose and rattly on the bike I tested (which was a demo model that goes to the Ebike Expo)
  • There’s a lot of high quality hardware on this bike including the belt drive, internal gearing, hydraulic brakes etc. but the price is pretty high at ~$5,700
  • The rack doesn’t offer pannier blockers or an obvious clip point at the bottom and can only support 15 kg vs. 25 kg on a lot of other racks I see out there
  • This isn’t a huge deal but I was surprised that the seat post was so short, usually they are 300 to 350 mm long but this one was only about 250 mm and I wanted to put the seat higher
  • This may be adjustable but I feel like the response time for power cutoff on the motor when you stop pedaling is a little long as shown in the video, Bosch feels faster and more responsive
  • The seat tube collar was unique and maybe not my favorite, it uses a vertical bolt and different wedge design vs. the horizontal quick release, I appreciate that it comes with a rubber cap and maybe that it is less vulnerable to theft?


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Comments (11) YouTube Comments

Tom V
6 years ago

I test-rode one of these but decided against it. It feels like a really well built, high quality product but I was put off by a few small points:

  • The high price.
  • I tried starting off facing up a steep hill and there was a good few seconds before I got any assistance and there is no throttle to help in this situation.
  • I live in Seattle where the transit buses have a bike rack on the front which can carry up to 3 bikes. The city is OK with electric bikes using the racks but there is a weight limit of 55 pounds which the Integrale exceeds. (Note it was quite hard to find this out because Kalkhoff annoyingly do not seems to publish the weight of their bikes).
Court Rye
6 years ago

Great points Tom, interesting to hear about the weight restrictions for ebikes on busses in Seattle… I was just visiting, great town! Many ebikes these days are in the 50 lb range… the Integrale does weigh more due in part to the higher battery capacity and accessories. I’m assuming you’d want fenders on any ebike you got given the rain? One of the big reasons I dig so deep for details on these reviews is that indeed, many companies do not list weight, stand over height etc. and even if I’m only looking at one of the four sizes, the weight should be fairly close. Appreciate you sharing your thoughts on the bike :)

6 years ago

Yes, fenders are a must for Seattle riding :)

I appreciate the details in your reviews Court, and the consistency. I don’t have the same priorities as you (eg I have never used a bottle cage) but having your reviews as a reliable baseline when comparing bikes is very useful.

Eric Smith
6 years ago

Thanks Court for the great work you do here! With the help with your site and after test riding many myself, ended up buying an Integrale S11 in August 2016 (despite the fact I think you hadn’t done a full review yet). I really love almost everything about this bike and it was a pleasure to ride. But there’s more to share here…

I concur with everything Court mentions about this bike (Pros and Cons) in his review. A few other ‘pros’ to mention:

  • There’s a single-speed “walk mode” available if you hold down the ‘+’ button. This is very welcome because I have a steep sidewalk on part of my commute where riding is prohibited. Although the walk mode speed is more like a trot or jog speed, and I’m 6′, it’s still a welcome feature.
  • The charger is very light weight.
  • The lights work good, although some night commuters might want to supplement the front with something brighter if they ride on very dark paths, or super bright roadways for visibility. The front light can be aimed up and down a little on the fly, and more with tools.
  • The bike feels solid and offers a comfortable ride.

Cons. As mentioned in my story below, there are some things that I hope Kalkhoff improves:

  • I hope they devise a way to install a pannier front rack with at least three attachment points and goes over the fork. (A front rack that just clamps onto each side separately of the suspension fork tubes, is unstable, wobbles, and possibly even dangerous.)
  • The display should be delivered to US customers set to English. Without a manual, or speaking German, it was frustrating to figure out how to do that.
  • The license frame should be removed, or at least fully attached so it doesn’t bounce around.
  • The dealer should be instructed to make sure the rear internal gear hub is properly tested and adjusted before customer delivery.
  • The front fender needs a rain/mud flap. (Ok, I’m in Seattle, so this might not be applicable to those of you in dry zones.) Otherwise the sturdy fenders are great!

I ended up returning it in October after both the shop and the bike itself gave me a less-than-expected experience. I only had use of the bike for ~2 weeks during that two+ month time due to service challenges and delays with the bike shop. But I did mostly enjoy my 12km (7mi) Seattle commute a couple times. One of the issues was before purchase, the shop told me they could put a front low-boy pannier rack on it. (Riding with low boy bags in front is so much nicer and more stable than rear bags.) After an unstable wobbly front rack solution from the dealer, and then their proposal to custom manufacture something I gave up on the front rack idea, and them. Another issue was that the S11 rear internal hub was either defective or not properly adjusted from day-one ownership. It sometimes skipped, failed to shift, and made loud cracking sounds. The shop claimed it was not adjusted properly, …after telling me it was defective. I still don’t know. The shop did not properly prepare the display for delivery, did not have the correct owner manual, and left on a partially attached EU license plate accessory which rattled over every bump. I also later discovered the bike I purchased was over a year old (August 2015), yet they told me it was a 2016. (My bike shop experience should not necessarily dissuade others from considering this fantastic speed pedelec bike.)

I plan to purchase a different make/model that tied with this one in my research and test rides. I’ll report back after that. And thanks again Court. Every time I watch one of your road test vids I feel nostalgic for South Bay in So. Cal. where I grew up! Nostalgic, but I still love the Pacific Northwest. :-)

Court Rye
6 years ago

Hey Eric, that’s some GREAT feedback… you were objective and related that each shop works differently and I appreciate that. Interesting points about the front rack, the license plate holder and your experience getting the display set to English. Most of this was either taken care of or irrelevant during my tests and it’s the kind of feedback that can only come from real life buyers! I’m hopeful that Kalkhoff team USA will see it and maybe work more closely with their dealers in the future. I wish you luck with your next electric bicycle, whatever it may be ;)

douglas a nemeth
3 years ago

I think I just purchased your actual bike from Seattle Ebike. It is exactly what you describe here. They did give my a very good deal and I’m satisfied but concerned about the rear hub, hopefully no issues. The test ride went smoothly.

I never asked but did wonder why an old model like this was still available. Although they did tell me of an owner who did not like it and traded up. Considering I only paid $3,100 including tax I think I did ok.

3 years ago

Hi Douglas, nice! It sounds like you got an amazing deal, and Kalkhoff is known for building high-quality products. The Impulse motor is great and the integrated battery provides a nice aesthetic and wonderful balance. I hope it works well for you, feel free to follow up with any comments in the future :)

3 years ago

Yep, maybe the same one. Great deal! Maybe they finally figured out how to adjust the rear hub. I heard they were shutting down the store. I still have the Specialized Turbo Vado 6 and have about 3,000 km on it in two years.

2 years ago

Múže vrzat gumovÿ řemen a když ano, čím ho namazat.Dīky.

2 years ago

Četl jsem, že řemenový pohon Gates Carbon nevyžaduje mastnotu. Tento článek říká: „Nemusíte mazat nebo odmašťovat pás.“


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