Stromer ST1 T Review

Stromer St1 T Electric Bike Review
Stromer St1 T Ebike
Stromer St1 T Tdcm Ultra Motor 500 Watt Gearless Hub Motor
Stromer St1 T 522 Watt Hour Lithium Battery Pack
Stromer St1 T Ergon Gc1 Ergonomic Grips Lowrise Bar
Stromer St1 T Backlit Fixed Display Panel
Stromer St1 T Schlumpf Geared Bottom Bracket 30t
Stromer St1 T Carbon Fiber Fork Schwalbe Big Ben Tires
Stromer St1 T Ergon Seat Threaded Mount Underneath
Stromer St1 T Hebie Spring Kickstand
Stromer St1 T Racktime 10 Kg Pannier Bike Rack
Stromer St1 T Shimano Deore Xt 9 Speed
Stromer St1 T Electric Bike 4 Amp Charger
Stromer St1 T
Stromer St1 T Electric Bike Review
Stromer St1 T Ebike
Stromer St1 T Tdcm Ultra Motor 500 Watt Gearless Hub Motor
Stromer St1 T 522 Watt Hour Lithium Battery Pack
Stromer St1 T Ergon Gc1 Ergonomic Grips Lowrise Bar
Stromer St1 T Backlit Fixed Display Panel
Stromer St1 T Schlumpf Geared Bottom Bracket 30t
Stromer St1 T Carbon Fiber Fork Schwalbe Big Ben Tires
Stromer St1 T Ergon Seat Threaded Mount Underneath
Stromer St1 T Hebie Spring Kickstand
Stromer St1 T Racktime 10 Kg Pannier Bike Rack
Stromer St1 T Shimano Deore Xt 9 Speed
Stromer St1 T Electric Bike 4 Amp Charger
Stromer St1 T


  • A solid, high speed city ebike with purpose built Aluminum frame, custom fenders and minimalist rack, premium integrated lights and hidden downtube battery
  • Available in two frame sizes and with an optional suspension fork for $350 more, the tires are large for improved traction and comfort and the saddle and ergonomic grips also feel good
  • Custom carbon fiber fork with stiff 15 mm thru axle (12 mm custom axle at the rear), the bike feels sturdy and the 180 mm hydraulic brakes stop well but also cut the motor and activate regen
  • One of the heavier, more expensive electric bikes out there but you get an excellent warranty and they're offering a free battery with purchase for a limited time

Video Review








Body Position:

Forward Aggressive

Suggested Use:

Commuting, Urban

Electric Bike Class:

Speed Pedelec (Class 3)
Learn more about Ebike classes


2 Year Battery (Or 1,000 Full Charge Cycles), 2 Year Motor, 3 Year Frame


United States

Model Year:


Bicycle Details

Total Weight:

62 lbs (28.12 kg)

Battery Weight:

6.4 lbs (2.9 kg)

Motor Weight:

16 lbs (7.25 kg)

Frame Material:

6061 Aluminum Alloy

Frame Sizes:

16.5 in (41.91 cm)20 in (50.8 cm)

Geometry Measurements:

Small 16.5" (30" Stand Over Height, 16.5" Seat Tube Length", 22" Reach) Medium 20" (32" Stand Over Height, 20" Seat Tube Length, 22" Reach)

Frame Types:


Frame Colors:

Metallic Brown

Frame Fork Details:

Rigid Carbon, 15 mm Proprietary Axle

Frame Rear Details:

12 mm Proprietary Axle

Attachment Points:

Rear Rack Bosses, Fender Bosses, Water Bottle Cage Bosses

Gearing Details:

18 Speed 2x9 Shimano Deore XT 11-32, Schlumpf Speed Drive 2-8005

Shifter Details:

Shimano Sora Triggers on Right


Schlumpf Drive, 30T, Alloy Guard


Aluminum Alloy Platform


1 1/8" Top 1 1/2" Bottom


Custom Alloy


Low-Rise, 25" Length

Brake Details:

Tektro Dorado HD-E715 Hydraulic Disc with 180 mm MT4 Carbon Steel Rotors, Tektro Levers with Motor Inhibitor and Regen Activation on Right


Ergon GC1 Ergonomic Rubber with Lockers


Ergon SME3 by Velo, Ergonomic

Seat Post:

Quick Release Collar, Aluminum Alloy Post

Seat Post Length:

350 mm

Seat Post Diameter:

31.6 mm


Alexrims, 559" x 23"


Stainless Steel, Black, 14G Front 13G Back

Tire Brand:

Schwalbe Big Ben, 26" x 2.15"

Wheel Sizes:

26 in (66.04cm)

Tire Details:

Performance Line Green Guard, 55-80 PSI

Tube Details:

Presta Valve


Custom Alloy Fenders, Racktime Carry Rack 22 lb (10 kg) Max Load, Hebie Spring Kickstand, Flick Bell on Left, Supernova E3 E-Bike V6S LED Headlight 165 Lumens, B+M Toplight Mini LED Rear Light, Optional Suspension Fork SR Suntour Raidon with Lockout $350


Locking Removable Battery Pack, 4 Amp Charger 2.3 lbs

Electronic Details

Motor Brand:

TDCM Ultra Motor

Motor Type:

Rear-Mounted Gearless Direct Drive Hub
Learn more about Ebike motors

Motor Nominal Output:

250 watts

Motor Peak Output:

500 watts SYNO drive gearless direct drive rear hub motor weighs 11 pounds (5kg) offers 42 Newton meters of torque

Motor Torque:

30 Newton meters

Battery Brand:


Battery Voltage:

36 volts

Battery Amp Hours:

14.5 ah

Battery Watt Hours:

522 wh Lithium-ion cells by Samsung

Battery Chemistry:


Charge Time:

5 hours hours for a full charge from empty

Estimated Min Range:

25 miles (40 km)

Estimated Max Range:

50 miles (80 km)

Display Type:

Fixed, Backlit LCD Display on Right


Speed, Avg. Speed, Odometer, Trip Time, Clock Time, Battery Percentage, Battery Level (10 Bars), Assist Level (Recoup 2, Recoup 1, 0, Eco, City, Tour, Power)

Drive Mode:

Torque Sensing Pedal Assist (TMM4 Torque Sensor)

Top Speed:

28 mph (45 kph)Speed Pedelec

Written Review

Compared with the ST1 S, the T (which stands for touring) has a more upright geometry due to low-riser bars vs. the flat bars, it has thicker ergonomic grips and an integrated Racktime carry rack at the rear. The two are very similar electric bikes and aside from color differences, could be easy to confuse. Both deliver impressive power and speed (maxing out around 28 mph with the POWER 48 motor) with responsive output thanks to a custom tuned TMM4 torque sensor. While there’s no true throttle mode on these ebikes, you can enter one of the special codes to unlock a low-speed boost mode that allows you to hold the plus button on the display for power boost up to 12 mph (great for starts or crossing a puddle without putting your feet in harms way… or even as a zippy walk mode if you’re willing to jog). The ST1 T is one of my favorite models in the Stromer lineup because it hits a reasonable price point while still delivering premium features and offering a higher top speed.

The large Schwalbe Big Ben tires cushion the bike at high speed which is a big deal given the lack of suspension. The rigid frame and thicker heavier build quality (with custom thru-axles front and rear) give this and other ST1 models a fluid, solid ride quality. It feels more substantial this way and there’s very little frame flex. I confirmed that Stromer does offer a basic suspension fork upgrade for ~$350 but you could also add your own and go for something lighter (theirs is an SR Suntour oil based fork with lockout)… the head tube is tapered 1 1/8″ at the top to 1 1/2″ at the base. The fork that ships with the bike is rigid but made with Carbon fiber to cut down on weight while simultaneously improving ride feel by dampening vibration. The ST1T weighs around 62 pounds (varying slightly by frame size) and in my book that’s heavy… but I understand why and am happy to make the trade off here. A lot of the weight comes from the powerful gearless direct drive hub motor from Ultramotor which is very satisfying. It powers you quietly (not as quiet as the ST2 motor but still unobtrusive) and it also helps to slow you down while recouping energy. This is one of the few ebikes that offers regenerative braking… but you have to squeeze the right lever to make it work as the left is not wired in. Alternatively, you can arrow down using the display interface to one of the two “recoup” levels which are great for long hills or moments where you actually want to challenge yourself and get a workout. Yes, you could pedal this bike to charge the battery but it wouldn’t be very efficient. I’ve heard something like only 10% of the energy being put into the motor (by you pedaling for example) actually ends up in the battery due to heat loss and inefficiency in transfer, they don’t want to over-charge the pack and I found that when it’s completely full regen and recoup don’t work at all so you’ll have to rely on the hydraulic disc brakes.

Powering the bike and its integrated LED ligtset is a beautiful, custom designed, Lithium-ion battery pack. The look is awesome, with a colorful aluminum casing and a slide-in door mechanism that nearly completely hides the pack (especially with the dark-brown color on the ST1 T models. You can charge the battery on or off the bicycle but unfortunately the plug adapter is different depending on whether you’re plugging into the side of the frame (circular) or into the base of the battery off the bike (rectangular) so Stromer gives you a dongle with the charger to switch between the two… All I can say is don’t lose that piece if you can help it ;)

Aside from a couple little quirks like the single-lever motor inhibitor/regen thing and the dongle adapter for the battery pack this is a really polished electric bike. The full length aluminum fenders are silent and hug the oversized tires closely which reduces toe clip and just looks cool. The integrated rack uses standard gauge tubing and would be perfect for commuters hauling panniers or a narrow trunk bag. The lights are both very high quality with the front being a Supernova that offers adjustable angle and is housed in aluminum. It’s the same one used on some of the Specialized Turbo models. Part of me wishes the lights could be controlled through the display panel (and that the display was metal, center-mounted and removable) but the flip side is that the lights work independent from the control systems and can be used while the rest of the bike is turned off.

There are only a handful of ebikes that really feel thrilling and satisfying on pavement and the Stromer lineup is definitely on that list. The TMM4 torque sensor is responsive at start but purposefully delayed when you stop pedaling to reduce the feeling of surge. It’s also designed to operate at lower levels and more slowly if you push gently (regardless of your assist level setting) and that’s cool. It feels more like an extension of your body but does require increased effort to achieve the highest top speeds and zippiest feedback. This trade off boosts range and I’ll close by saying that riding above 20 mph, while fun, significantly shortens range due to air resistance. As far as speed-pedelec Class 3 ebikes go, Stromer is a trusted name with a big following. You pay a premium for their designs but for a limited time it sounds like they are tossing in a second battery pack with purchase (a slightly smaller 36 volt 11 amp hour pack) and the 2+ year warranty is hard to beat.


  • For a limited time you get an additional (smaller) battery pack for free with the purchase of ST1 models, the battery is 36 volt 11 amp hours for ~20+ miles of additional range and weighs 6.6 pounds so you could toss it onto the rack or in a backpack with the charger
  • Custom thru-axles (15 mm front and 12 mm rear) for added strength and stiffness, performs better at high speed and with the heavier weight, the rear spokes are also larger 13 gauge to support the added power of the motor
  • Unique drivetrain with a 9 speed Shimano Deore XT cassette and 2 speed bottom bracket gearset by Schlumpf delivering 18 gears total… requires fewer shifters on the handlebar and requires less maintenance than two derailleurs
  • Larger 2.15″ tires improve traction and add comfort when riding at high speed, built in puncture protection to reduce flats
  • The integrated Aluminum alloy fenders look amazing, they hug the tires closely and have struts for added strength and reduced rattling
  • Premium Supernova headlight is bright, tough and mounted on an adjustable swivel… both it and the back light run off the main battery for convenience but you have to switch them on with a rubber button on the back of the front light vs. using the display panel
  • There’s a unique “start mode” built in that works like an under powered throttle (just hold the up button for several seconds), this could be used for walk-assist or to get you going without pedaling
  • I love the nice little extras you get with this bike including large alloy platform petals, bottle cage mounting point on the downtube, neoprene slap guards on both chain stays (to hide wires), a flick bell, Ergon ergonomic locking grips and the upgraded spring kickstand
  • Powerful oversized hydraulic disc brakes offer excellent stopping power and are ebike specific so they cut power to the motor when activated and activate energy regen mode to recapture some energy (~10% efficient but this also reduces wear on the brake pads)
  • The fork is custom Carbon fiber vs. Aluminum alloy which reduces weight slightly and improves ride comfort… this is really nice at high speeds along with the larger tires
  • Purpose built frame is available in two sizes for improved fit and the unique slide-in battery stays very hidden while keeping weight low and center for improved handling
  • You can enter special codes to change setting in the LCD display… hold the power button and the plus button for a few seconds then arrow up or down to change the four digits (press power to move to the next digit) then hold power to submit the code, the full list of codes was shared in the EBR Community here


  • Both wheels require tools to take off, an adjustable wrench for the rear and 7/32″ allen key for the front which makes changing flats and doing maintenance more involved but also deters theft
  • The rear rack is nice to have but I wish it could support more weight, it’s a sleek design with standard gauge tubing (so it will work with most clip-on panniers) but has a 22 pound (10 kilogram) limit
  • This is a heavier electric bike… the gearless direct drive motor is powerful and fast but it weighs ~16 lbs and the larger 14.5 amp hour battery, fenders and rack add even more (but at least the battery is removable so at least ~6.4 lbs can be taken off, the rear wheel would require tools)
  • Only available in one color with these specific features, you could consider a standard ST1 in black or white as well as the ST1 Special Edition in metallic blue or the ST1 S in metallic green
  • One of the more expensive electric bikes at close to $5k but you get premium components like the Schlumpf + Shimano Deore XT drivetrain and a solid 2+ year warranty
  • Only available in high-step “diamond” frame style for now, if you want a step-thru Stromer for easier mounting and stand over consider the ST1 Platinum or ST2 models
  • I love that the bike offers regen and has a motor inhibitor built in but wish that both levers had that vs. just the right


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Comments (8) YouTube Comments

6 years ago

You’re in my city! Stop by CrossFit Humanity. Would love to pick your e-bike brain in exchange for a free workout.

Court Rye
6 years ago

Hi David! I’m not in San Diego anymore, I was only in town for a day but I really appreciate the invite and would love to connect next time. Feel free to use the contact form here to reach me via phone or email and we can chat sometime :D

6 years ago

I think that with a bike that goes as fast as this one, a fairing might really be a good addition. Fairings tend to do the most good above 20 mph, but once you are at those speeds a fairing would extend range as well as allow you to maintain faster speeds. Here is one that would fit this bike.

Court Rye
6 years ago

Very cool! Thanks for posting this Nirmala, I think you’re totally right about adding a faring. Did you see this lady Marissa Muller that toured the US with a Specialized Turbo and solar trailer to charge batteries, she had a wind faring to make the ride more efficient (and possibly comfortable).

6 years ago

Very cool. Solar and electric bikes go together like peanut butter and jelly!

6 years ago

I’ve owned an ST1 Limited Edition (identical to the ST1T except for the headlight) for a few months now and still can’t believe how much I love it. Fast, powerful, and beautifully engineered. I love bicycles, but I’m out of shape enough that going for a ride though our very hilly area was more chore than fun, so the stationary bike has been getting more mileage lately. Although I gave it up when I moved to Philly, I also used to commute by motorcycle, and really miss being on that kind of bike.

The ST1 perfectly filled those gaps. I still can’t believe how fast, powerful, practical, and FUN this thing is. In “eco” mode, I get great range (at least 25 miles through lots of hills) and a good workout. There have been a few times that I wished I had a lower gear range, but to tackle the big, long inclines, I just put it into “power” mode and zoom past the surprised cyclists in front of me. On level pavement, this thing goes 0-30 in seconds… can’t wait to start using it for the daily commute.

Court, special thanks to you for this fantastic site. Your passion for reviewing anything with pedals and an electric motor let me learn about ebikes, narrow the field, and ultimately feel incredibly comfortable with paying an incredible premium over a traditional bike. That premium was well worth it! And now I’m starting to understand your passion. Thank you!

Court Rye
6 years ago

Steven! Thanks for sharing your experience with the ST1 Limited Edition (great choice… I’m hoping to review this model eventually but you’re correct, it’s similar to the ST1T). I do my best and really enjoy helping others discover electric bicycles, they changed my life and enabled me to commute in Austin when I wasn’t sure my knee could take riding a regular bike daily anymore. Ride safe out there :D

6 years ago

It’s been just over 4 months of owning a Stromer ST1 Limited Edition. This post is long overdue; but, I wanted to ensure that I had enough mileage on the bike before formulating my review. First of all, there is no doubt in my mind that this bike is worth every penny and here’s why. The cost benefit analysis is really simple. But, i’ll start with the facts.

My normal commute to work is 8 miles each way. By car that takes me an average of 28 minutes. On my regular commuter bike, it took ~50 minutes along with A LOT of sweat (average speed of 10-12.5 mph). I’ve been commuting to work Mon-Fri on the Stromer since the first week of March. It takes me on average ~28 minutes without even trying hard; but, can make it there in 25 minutes (average speed of 15.5-17.5mph). Also, with the Stromer, I’m able to take the scenic route, which is about .5 miles shorter than the route by car. My commute by bike requires me to go up Laurel St, which is one of the steepest streets that I know of in the city. On my regular bike I have to walk up that hill. On the Stromer, I can ride up while staying seated. Don’t get me wrong though, it’s still a workout. As a matter of fact, within the first month of owning the Stromer, I lost 10 pounds. Since then, i’ve lost an additional 5 pounds & that’s without dieting.

I average about 333 miles/month.I took a picture of the bike’s odometer exactly three months after getting it and it said 1000 miles. I have not had any issues at all with the bike. It’s extremely comfortable to ride compared to my other commuter bike. Oh…another amazing thing to mention is that I can ride the bike on flat sections without any electric assistance at 16-20 mph. That allows me to do the 16 miles of my commute each day in just over an hour total commute time (~32 minutes each way) while only using 25% of the battery (making it home with 75% of the battery remaining). If i’m feeling lazy (which is very often) I will make it home at the end of the day with 40% of the battery remaining from my 16 mile ride. That equates to a range of about 27-64 miles per charge. Which is pretty amazing considering my commute has almost 1000 feet of elevation climb each day.

Consider the costs vs. the benefits. Assume your pay is $10/hour, you spend an hour in the car each day commuting and barely have time to work out. With that, assume you pay $100/month on gas. That was me in January 2016, when I was the heaviest I’ve been in my life (235 pounds). With the Stromer, I’ve effectively gained an extra hour in my day. The commute on the Stromer takes just under an hour a day, but that also prevented me from spending an hour in the gym each day. What would normally be a painful 2 hours spent commuting and exercising, I’m now only spending an hour. Saving 5 hours a week, & applying my $10/hour wage, I can say I have effectively saved ~$300/month = [($10/day x 5 days/week x 4weeks/month) + $100gas]. That’s a car payment. Within 10 months of owning the bike, that would be a savings of $3,000. Now, assuming you do this over next few years, those savings will just continue to go up. On top of that, the weight lost and the health gained, will add to your quality of life. Even if you don’t consider the cost savings, the fact that you can gain back 250 hours of your life each year (5hrs/week x 50 weeks/yr) is like getting an extra 1 month of vacation time.

With all of that said. I would not hesitate at all to go out & get a Stromer. There is no need to feel guilty about getting yourself a nice bike that is going to allow you to take control of your life & give you extra time with your family & friends. This will be the best decision of your life.


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