Giant Road-E+ Review

Giant Road E Plus 1 Electric Bike Review
Giant Road E Plus 1
Giant Road E Plus 1 Syncdrive Yamaha Motor 250 Watt
Giant Road E Plus 1 500 Watt Hour Battery Pack
Giant Road E Plus 1 Fixed Backlit Lcd Display
Giant Road E Plus 1 Taped Drop Bars Alloy Fork Ebike
Giant Road E Plus 1 Pr 2 Disc Alloy Rims Drop Bars
Giant Road E Plus 1 Contact Sl Neutral Sadal
Giant Road E Plus 1 Shimano 105 Front Derailleur Compact Double
Giant Road E Plus 1 Shimano Hydraulic Disc Brake Rotor 160 Mm
Giant Road E Plus 1 Shimano Ultegra 11 Speed Cogset
Giant Road E Plus 1 Motor Protector Plate
Giant Road E Plus 1 3 Amp Charger
Giant Road E Plus 1 Electric Bike Review
Giant Road E Plus 1
Giant Road E Plus 1 Syncdrive Yamaha Motor 250 Watt
Giant Road E Plus 1 500 Watt Hour Battery Pack
Giant Road E Plus 1 Fixed Backlit Lcd Display
Giant Road E Plus 1 Taped Drop Bars Alloy Fork Ebike
Giant Road E Plus 1 Pr 2 Disc Alloy Rims Drop Bars
Giant Road E Plus 1 Contact Sl Neutral Sadal
Giant Road E Plus 1 Shimano 105 Front Derailleur Compact Double
Giant Road E Plus 1 Shimano Hydraulic Disc Brake Rotor 160 Mm
Giant Road E Plus 1 Shimano Ultegra 11 Speed Cogset
Giant Road E Plus 1 Motor Protector Plate
Giant Road E Plus 1 3 Amp Charger


  • An aggressive road bike with 28 mph top electric-assisted speed, drop bars and sport saddle, you get Shimano Ultegra rear and 105 front derailleurs with 22 gear combinations to work with
  • Shimano hydraulic disc brakes offer powerful stops and tend to stay cleaner than rim brakes, all-Aluminum frame is lightweight and sturdy but doesn't absorb vibrations as well as Steel or Carbon fiber
  • Available in four frame sizes for better fit, sold through Giant dealers worldwide so you can get setup right and rely on knowledgeable technicians for tuneups and any warranty support
  • The Yamaha mid-drive system is relatively quiet but still very powerful, it doesn't provide as wide an RPM range so I find myself pedaling slower than I'd like at times, LCD display is not removable

Video Review








Body Position:

Forward Aggressive

Suggested Use:

Urban, Road

Electric Bike Class:

Speed Pedelec (Class 3)
Learn more about Ebike classes


2 Year Comprehensive, Lifetime Frame


United States

Model Year:


Bicycle Details

Total Weight:

44 lbs (19.95 kg)

Battery Weight:

7.5 lbs (3.4 kg)

Motor Weight:

7.6 lbs (3.44 kg)

Frame Material:

ALUXX SL-Grade Aluminum

Frame Sizes:

17 in (43.18 cm)19 in (48.26 cm)21 in (53.34 cm)23 in (58.42 cm)

Geometry Measurements:

Medium: 19" Seat Tube, 21.5" Reach, 30" Stand Over Height, 69" Length

Frame Types:


Frame Colors:

Matte Black with Blue and Neon Yellow Accents

Frame Fork Details:

Rigid ALUXX SL-Grade Aluminum, OverDrive, 9 mm Skewer with Bolts

Frame Rear Details:

9 mm Skewer with Bolts

Attachment Points:

Fender Eyelets, Rear Kickstand Mount, Bottle Cage Bosses

Gearing Details:

22 Speed 2x11 Shimano Ultegra Rear Derailleur 11-32T, Shimano 105 Front Derailleur 34/50T

Shifter Details:

Shimano RS685 Paddles on Left and Right


Custom Forged, 170 mm Length


Wellgo M-20, Alloy Platform Cage


Tapered 1-1/8" to 1-1/2"


Giant Connect, Alloy, 90 mm Length, 8° Angle, Three 5 mm Stacks, One 10 mm Stack


Giant Contact, Alloy Drop Bar, 31.8 Clamp Diameter, 17.5" Width

Brake Details:

Shimano RS785 Hydraulic Disc with 160 mm Rotors, Heat Sinc on Calipers, Shimano RS685 Levers


Black Tape, Rubber Hoods


Giant Contact SL Neutral, SST Tubular Rails

Seat Post:

Giant Contact, Aluminum Alloy

Seat Post Length:

300 mm

Seat Post Diameter:

30.9 mm


Giant PR-2 Disc Alloy, Double Wall, 28 Hole, Giant Performance Tracker Road Disc Hubs


Stainless Steel, 14 Gauge, Black with Silver Nipples

Tire Brand:

Schwalbe Durano, 700 x 32 (28" x 1.25")

Wheel Sizes:

28 in (71.12cm)

Tire Details:

RaceGuard Dual Compound, 55 to 95 PSI

Tube Details:

Presta Valve


Locking Removable Battery Pack, 1.8 lb 3 Amp Charger

Electronic Details

Motor Brand:

Giant SyncDrive by Yamaha

Motor Type:

Mid-Mounted Geared Motor
Learn more about Ebike motors

Motor Nominal Output:

250 watts

Motor Peak Output:

500 watts

Motor Torque:

80 Newton meters

Battery Brand:

Giant EnergyPak

Battery Voltage:

36 volts

Battery Amp Hours:

13.8 ah

Battery Watt Hours:

496.8 wh

Battery Chemistry:


Charge Time:

4.5 hours

Estimated Min Range:

30 miles (48 km)

Estimated Max Range:

65 miles (105 km)

Display Type:

Giant, Fixed, Backlit, Monochrome LCD


Battery Info-Graphic, Battery Percentage, Speed, Assist Level (Off, Eco, Normal, Power), Cadence (RPM), Trip Time, Trip Distance, Average Speed, Max Speed, Odometer, Range,

Display Accessories:

Independent Button Pad on Right (On/Off, Up, Down, Light, i, Walk Mode), 5 Volt Micro USB Port on Left Side of Display

Drive Mode:

Advanced Pedal Assist (Wheel Speed, Pedal Torque, Pedal Cadence)

Top Speed:

28 mph (45 kph)

Written Review

The Giant Road-E+ is a unique electric bike because it’s designed for performance. In the US, the ebike space has traditionally been dominated by commuter products with some cruisers sprinkled in for recreational riders that want to feel young and avoid overheating or struggling to keep up with friends and spouses. The Road-E+ by contrast is aggressive and sporty… Rather than limiting you to 20 mph like the majority of e-bikes, it delivers up to 28 mph assisted top speed making it a Class 3 product (not permissible on many trails and some paths in California and other states). This is an electric bike that fits perfectly on the shoulder of the road and can help you earn the respect of cars starting off the line and ascending hills. I was thrilled to give it a spin for this review because I love road bikes and know that Giant has a great reputation for quality at value price points. My takeaway is that it would ease some of the knee pain I experience on longer rides with lots of climbing, allow me to jump into more dynamic rides on the weekends even though I cannot train as frequently as my friend (and am thus in limited shap by comparison) and offer a good alternative to my non-electric road bike when my muscles need a break. Some of the challenges I experienced were the heavier footprint at ~44 lbs, stiffer all-Aluminum frame and limited motor RPM range. I have tested and reviewed other electric road bikes with drop bars and the Road-E+ is well priced by comparison but it’s still not cheap. At $4k you’re getting decent components (Shimano Ultegra and 105) with a 22 speed drivetrain (many others are 1×10 or 1×11) and I love that there’s a vast network of dealers selling and servicing them, helping to honor the two-year comprehensive warranty on offer.

Driving the bike is a 250 watt nominal, 500 watt peak mid drive motor from Yamaha. Those numbers aren’t as important as torque in my opinion and the SyncDrive offers 80 Newton meters… which is a lot. Bosch’s mid-drive, by comparison, offers 63 to 75 Nm and is not compatible with multiple front chainrings. The Yamaha motor is quiet and smooth but doesn’t quit spinning as quickly as Bosch. It measures the same wheel speed, pedal cadence and pedal torque signals and allows you to shift gears smoothly if you ease off a bit before pressing the paddles. I love how integrated the motor is at the bottom bracket, how nicely it fits into the purpose-built frame and that it keeps weight low and centered as opposed to a hub motor system (popular with lower-end ebikes). One of the biggest benefits you get from a mid-motor is normal wheels and hubs that are easier to service and remove for transport or flat fixes. In addition to some plastic and frame surrounds, the motor also has a skid plate on the bottom that’s designed to protect it. Notice that the chainrings hang down lower than the motor and would take damage before it would in most cases. The only big compromise I experienced with this drive system is a limited RPM output that requires frequent shifting to hit higher top speeds and sometimes leaves me wanting to spin faster before shifting. The problem with this scenario is that if I want to spin faster I end up doing it all on my own (and pushing more weight plus the normal wind and wheel friction). It’s difficult to raise the speed of the bike all by yourself and when the motor isn’t able to keep up you simply have to shift gears to go faster. For many people, the bike is simply amazing and works flawlessly but this is one area that I sometimes struggle with on the Yamaha motor compared with Bosch and it’s why I love that you can go to a shop and take a test ride before buying.

Powering the motor is a custom 36 volt 13.8 amp hour battery pack named “EnergyPak”. I’m not sure what brand of cells are being used here but I’d guess they are higher quality (Samsung or Panasonic). With nearly 500 watt hours of capacity, this is a larger than average battery that Should take you 50+ miles depending on the level of assist chosen… As with all speed-pedelecs, as you ride above 20 mph the efficiency and range of the bike really drops off due to wind resistance. For me, it’s a reasonable trade-off and an area that’s addressable with the included 3 Amp charger (faster than the average 2 Amp I see on many other ebikes) or the upgrade 4 Amp charger option. I did not see this optional fast charger so cannot comment on price or availability but it got me excited. Specialized offered a similar fast-charger option with their ebikes a couple years back and they tend to be larger and heavier. Again, the three amp charger seemed great and wasn’t too large. I do like that it has a metal plug, that the charge port on the battery case is covered well with a rubber flap and that the battery locks securely to the frame but can be charged on or off so you could top it off at the office perhaps or maybe while eating lunch in the mountains at the half-way point during a ride. The battery design is simply beautiful and I love how they sort of integrated it with the downtube so the bike doesn’t scream “I’m electric” like some others do. The one area that isn’t so great is handling the pack. There’s literally no handle or loop to grab onto. With replacement packs costing upwards of $800 this is not something you want to drop…

Operating the Giant Road-E+ is pretty easy. Just mount the charged battery (I love that it clicks in without the key being necessary) then press the power button on the control pad. The display comes to life showing a precise charge level infographic and there’s even a percentage readout AND dynamic range estimate. Depending on the level of assist you arrow up or down to, the range estimate will change. It’s great to have this kind of feedback at your fingertips vs. guessing so that you can plan your ride for maxiumum fun. On this note, please make sure you always check your tire pressure because as with traditional road bikes, the narrower tires here can get snake-bite punctures easily if you hit a curb or let the PSI drop too low. This is a heavier bike after all and unlike many other e-bikes, the tires are narrow. So anyway, the display offers three levels of assist to choose from and gives you access to trip stats like range, trip distance, speed and max speed. If you’re someone who likes to use Strava on your phone or use a Garmin device, you can do this easily with the Giant Road-E+ without having to run the juice down because there’s a little Micro-USB port on the left side of the display. One area of concern or question is where and how to mount your device given the already large LCD display. Also, the display is not removable so parking and storing the bike could present more opportunities for scratches which is a bummer. Consider putting a towel over… This and many other parts of the bike are smart and modular so if they are broken or lost, your Giant dealer should be able to help with a fix.

At the end of the day, there are only a few choices when it comes to electric road bikes and of course, you’d want a speed pedelec with drop bars. Beyond that, the four frame sizes, dealer network and beautiful integration seen here really impressed me. For $4k I feel like you get a lot of value and could have a blast with this bike. I love that in addition to bottle cage bosses, they added threaded eyelets and a mounting provision at the rear for a kickstand and some mounts for fenders. There’s no rack mount but this really isn’t a commuter setup… frankly, I’m not sure how well fenders would really work but the holes are there. Giant sells a wider range of electric assist bikes in Europe and it’s wonderful to finally see them in the US. This is a refined product, despite being “new” to this market and I could tell that they had ironed out a lot of the kinks and compromises that other systems had not when they first arrived. This thing uses a smart, reliable drive system that can work with you to achieve new types of rides and because it’s from a bigger more recognized brand, I feel like it might garner more respect as well (at least in the USA where ebikes are still catching on). Because the frame is all Aluminum (including the rigid fork), one thing I would consider is a seat post suspension from BodyFloat. Their systems tend to be highly responsive, offered in lighte-weight materials like Carbon fiber and Titanium and are adjustable to rider weight. You might also benefit from a suspension stem like the ShockStop.


  • It’s rare to see electric road bikes with drop bars that are also speed pedelecs (28 mph top speed vs. 20 mph) and this one comes in four frame sizes which makes it accessible to a wider audience
  • Giant has a vast network of dealers and is a larger more reputable bicycle company than most, seeing a product like this (with the complexity of electric systems) feels more reliable
  • The Yamaha mid-drive system is one of the quietest and most responsive motors I’ve tested, while it does have a more limited RPM output (requiring more shifting to fully optimize) it works well and the torque sensor lets you shift without mashing just by easing off the pedals as you might with a non-electric bike
  • I love how integrated the battery pack looks but also that it’s fully removable (reducing overall weight by ~7.5 lbs), worth taking off when carrying on a car rack or doing service
  • Hydraulic disc brakes are the way to go with a heavier bike like this and should perform well if the road is wet or dirty as they tend to stay cleaner than rim brakes… they also stay out of the way when taking wheels off for quick service
  • The frame is completely purpose built, cables are internally routed and the battery and motor are streamline, I love that they managed to squeeze in bottle cage bosses despite the much larger downtube
  • You get 22 speeds on this ebike vs. just 10 or 11 on some of the other mid-drive system and the component groups (Ultegra and 105 from Shimano) are pretty good, this adds up to a more natural and wide range of pedal cadence options, in short, I believe it’s a compact double setup as you’d see on a non-electric bike
  • The battery charger puts out 3 Amps which is above average so you should get faster charge times, I like the rubber cover on the charge port near the base of the battery pack but would suggest being careful not to bump the cable with the left crank arm when it’s plugged in
  • The motor assist is highly adjustable so you can still get an excellent workout, for people with a hurt knee or leg, those with heart conditions or people who want to take a break between strenuous rides this would be an excellent platform and it lets others draft, great for a cycling coach or others looking to maximize availability without straining muscles too much
  • I like that the display panel has a Micro-USB port on the left side where you could charge a phone, run some lights or use other portable electronics for longer periods relying on the large main battery
  • In addition to range approximation (based on the power level chosen and remaining battery capacity) there’s a good battery info-graphic with battery percentage! Many ebikes just show a 5-bar graphic with 20% drops… Giant went above and beyond with percentage here and I think it’s useful
  • As someone with a crowded space and rented walls… I appreciate that there are threaded eyelets on the left chainstay for adding a kickstand!
  • The motor and battery weight are kept low and centered on the frame helping to optimize handling and even lifting if you have to carry the bike up stairs or mount it on a rack


  • Yamaha is a large reputable company and their motor is compact, quiet and well integrated here but it doesn’t offer as wide an RPM as some other mid-drives like Bosch, this means you have to shift more actively to hit the top speed
  • Given the all-Aluminum frame and fork, there’s not a lot of foregiveness going over bumps (especially at high speed), people tend to ride ebikes further and at higher average speeds so I’d consider using a Thudbuster or BodyFloat suspension seat post (look for 30.9 mm diameter) and maybe even a suspension stem, perhaps future Road-E+ models will offer a Carbon fiber fork?
  • The display is easy to read and navigating the menus is intuitive but you can’t take the display off which means more sun damage and possible scratched when transporting the bike or parking it outside
  • The battery pack weighs 7.5 lbs and doesn’t have a handle or great ridge for securely gripping and carrying it… so be careful not to drop it! I like that it can be left on the frame to charge
  • While the motor is very responsive to your pedal torque, there is no built in shift-sensing protection system so you could mash your chain if you don’t shift consciously


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Comments (22) YouTube Comments

Joe Bernard
7 years ago

Nice bike, but handling that battery is going to be an issue. Even with the handle on my Haibike’s battery, I’ve found that it’s easy to muck up the stick-on graphics. With the Giant battery you’re pretty much forced to grab it right where the decals are.

Court Rye
7 years ago

Good point Joe, I hadn’t thought as much about sticker placement and fingerprints, thanks for the feedback!

7 years ago

Hi Court, As always, another great review. I bought this bike in February as soon as they released it for sale in US. I use it for my daily commute to work and put on about 500 miles on it. I really love this bike. It has very impressive handling, amazing range and fun to ride. I am about 195 lbs with additional cargo of 10-15 lbs and am getting about 60 miles in a single charge even though my commute includes several hills with a couple of really steep ones. On my other 2015 Diamondback Trace EXC, I can only get about 20 miles in a single charge. The Road E+ have the same feel as riding a normal road bike so you will feel the road bumps. To help with the road bumps, I changed the factory saddle which is too firm for me with the Serfas Variant 2 which enables you to adjust the firmness of the saddle. I also like the fact that it does not cut-off the motor immediately. When I am ready to shift gears, I stop peddling momentarily and immediately shift gears so that the momentum of the motor before it cuts off is just enough to make the shifting very smooth then continue peddling. A couple of things you mentioned are different on my bike:

  1. The seat post my bike came with is a carbon fiber, but you indicated that it is aluminum on your review. The Giant website have it listed as “Giant Contact Composite 30.9 mm
  2. My charger plug to the battery pack is plastic, but you show a metal end
Court Rye
7 years ago

Interesting, thanks for sharing your feedback about the seat post and charger Hiruy! I enjoyed reading about your experience with range and comparisons to the Diamondback Trace. Sounds like you’re a seasoned electric cyclist at this point! Keep riding safe and thanks again for your positive feedback on the site :)

Joe Bernard
7 years ago

The Yamaha motor on my Haibike Sduro Trekking has that slight over-rev feature, too. FYI, I found that stopping pedaling was too disruptive to my rhythm, so I’ve gone back to the standard practice of slightly backing off pedal pressure for shifts. I suppose this could wear out my chain faster, but I’ll take the cost hit for it.

Soren Thomsen
7 years ago

Hi, thanks for the review. Can you estimate what the RPM limitation is? Does it simply stop to contribute at a certain RPM or what happens there? Thanks, Soren

Court Rye
7 years ago

Hi Soren, in my experience the Yamaha motor used on the bike reviewed here and some other Haibikes has a 100 RPM limit vs. Bosch and Brose which reach 120 RPM. So in practice, that means that when you are spinning and reach a certain pedal rotation speed, the motor sort of eases back and won’t help anymore… so you can either work harder on your own if you prefer higher RPM riding or you can switch to a lower gear which will slow your RPM but allow the motor to help out again. In practice, at least for me, this results in more frequent shifting and a ride style that is less enjoyable… because I like to spin due to a sensitive knee and a desire for a faster “cardio” type ride vs. slow and powerful. Does that make sense?

Soren Thomsen
7 years ago

Thanks for your comprehensive answer. That does indeed make a lot of sense.

6 years ago

Just got this bike and rode two straight days at Horsey Hundred on the rolling hills around Lexington KY. Am about 185 lbs. Did 61 miles and 3,000 ft of climbing, and averaged 17 mph for rise. Still had 24% battery life left. Second day was nearly the same. Very natural feel and quiet. NOTE- the small frame does not have frame mounts for bottle.

6 years ago

Awesome! Thanks for the wonderful feedback about your weight, range, and the type of terrain… you really got excellent range there Dwight :D and yeah, the point about the small frame not having bottle cage bosses is a good one. I hope the bike continues working well and you have many more safe rides this summer ;)

Byron Mucke
5 years ago

Hi Court, since this was a road e-bike review I thought I would see if you are going to have the opportunity to review the 2018 /2019 line of road e-bikes. This seems to be a strong trend including the Bianchi Aria e-Road and Orbea Gain using the EBikemotion X35 system. This is the same system as the Desiknio you reviewed. didn’t the IGo road bike that you talked about on one of your trade show videos had the X35. Or the Pinarello Nytro and similar that use the Fazua system. I believe I read that Pinarello also has or is replacing the Nytro with the Dyado (?) that uses the X35. There seems to be a lot of controversy with these bikes because they are on the edge of that red line separating the road bike purists from the masses. Just as the MTB crowd resolved their issues I believe the road contingent will see the value in a little assist for those longer rides or that last ascent. It would be great to get your feedback and opinion on these new bikes and there viability in the e-bike market.

5 years ago

Great question and background info, Byron. Yes, I’ll be seeking out Giant and some of the others who are doing road bikes. It was neat to see the prototype road bike (that I called the Ghost) from iGo on the last visit. None of the plans are set in stone yet, I’m traveling in Seattle right now for reviews and then spending time with family for Christmas but I’ll be jumping right back in when January arrives. Keep an eye out and stay in touch! I’d love to chat with you sometime about Hill Topper, feel free to email me with the contact form here :)

Byron Mucke
5 years ago

Hi Court,

Welcome to rainy Seattle.

Along with the ever growing number of e-bike devotees, we at Hilltopper Electric Bike Company appreciate your enthusiasm and in-depth coverage of the e-bike market, and look forward to sharing our products and experience in 2019.

Have a Happy Holidays from all of us at Hilltopper!

4 years ago

Hi there, I’m very interested in this bike, especially with your review. Are there any competitors for 2020? And are there any new updates to this bike since your review? So far this is the only bike I can see that fits the bill for long range of 60+ miles and a top speed of 28mph. I have a weekend commute to see my significant other 50 miles away from me, and I’d love to ditch the car and bus for an electric bike. Thanks

4 years ago

Hi Sean! Giant offers good value and has designed a really beautiful product here, with the custom battery pack and efficient Yamaha mid-drive motor. That said, we’re seeing more and more Class 3 (speed pedelec) road style ebikes. Here’s a full list of what I consider to be “road” and you can look for the Class 3 tag as you scroll through. I really enjoyed the BULLS DESERT FALCON EVO with Bosch Speed motor and the Specialized Creo models with proprietary SL motors (super light, offers a second battery pack range extender that looks like a water bottle). I hope this helps you and I’d love to hear what you finally decide on, and how you like it ;)

3 years ago

I bought a 500w battery for greater distance. I see the battery cover plate should slide off once the end screw has been removed. I can’t get mine to move at all.

3 years ago

Hmm, that’s interesting… Do you have a Giant dealer nearby, Ted? Perhaps they have a special tool, or maybe the screw was secured with Loctite or something for extra protection. I haven’t done a lot of experimentation with battery cover removal. Maybe there’s someone in the Giant forums who can help out?

2 years ago

I’ve had my Road E+1 for just over a year and 2500 miles. It’s been to the dealer 4 times and still isn’t working properly. It randomly shuts off, the battery rarely charges to 100% and the display doesn’t work properly. Range has dropped off to less than 45 miles. The root cause was that the battery was loose and vibrated in the frame. Giant is well aware of the problem but chooses to approach it as though they know nothing. Support from them is poor at best. They don’t return my emails and are slow to respond to the dealer. Definitely my last Giant bicycle.

2 years ago

That’s really frustrating… Thanks for sharing your experience here to help others. I haven’t engaged very much with Giant, although I have reached out and requested details and access to bikes. They seem a bit more hands off. Sorry Fred :(


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