The SRTYGHW 700C 1000W rear hub conversion kit is an attempt to find middle ground in a marketplace that has traditionally offered either a low-cost but loud geared motor, or a high-cost but relatively quiet gearless motor. This kit takes a brushless gearless motor and puts it inside a 48 V package designed for use on 700 C road and hybrid bicycles. The kit also comes with a dual-mode controller that will determine your wiring configuration. All of this is combined in a budget-friendly manner.
Specs and Build Quality
The big news here is the 1000 W brushless gearless rear hub motor. The "gearless" designation refers to the fact that there are no planetary gears inside the hub motor. a design element that greatly reduces the likelihood of stripping gears. Gearing is a significant advantage of some other types of motors used in e-bikes, including those based on DC motors (e.g., the Bafang BBSHD). These geared motors provide greater low-end torque compared to their non-gearmotor counterparts. However, these gearing advantages come at the cost of increased maintenance requirements (i.e., eventual grinding of the gears), especially if the rider plans to abuse the motor. In contrast, a gearless motor provides lower maintenance requirements in exchange for slightly less low-end torque. Therefore, for riders who plan to simply use their e-bike frequently without worrying too much about performance at slow speeds, a gearless motor may be a preferable choice.
As previously stated, the SRTYGHW 700C 1000 W rear hub conversion kit is designed to fit 700 C wheels. As such, it is compatible with bicycle frames having 28-inch and 29-inch rims. This represents a departure from many low-cost conversion kits available today, which often target the smaller diameter 26-inch rims found on many hybrid bicycles. If you are the owner of a road bike, gravel bike or hybrid with thin tires, then this is likely to be one of the few kits currently available that directly addresses your specific needs without requiring additional modifications to your bike's frame.
In addition to being a strong candidate for 700 C wheels, the wheel itself has an aluminum alloy construction, representing another area where the build quality of the product excels. One reviewer mentioned the strength and durability of the wheel specifically stating that he believes it to be well made, robust and corrosion-resistant. Additionally, he reported that it was able to support his 264-pound weight requirement. This type of load rating is uncommon among hub motors and indicates that the axle and rim used in the wheel are not constructed using inexpensive stamped materials.
A smooth acceleration curve is provided by adjusting the five different power delivery modes. Depending on how much effort you wish to expend during pedaling, you can adjust the amount of assistance provided by stepping through the five different modes. Using the cruise function allows you to maintain a consistent speed on a long, straight section of road allowing you to avoid fatigue caused by maintaining constant throttle input. At maximum assisted speed (approximately 28-35 mph depending upon your body weight, tire pressure and whether or not the terrain is flat) you can achieve approximately 45-55 km/h (28-34 mph).
An LCD screen is included as part of this kit providing information regarding your current speed, remaining battery charge, and selected level of assistance. Thusly, you will never need to fly blind. Although the spec sheet appears to indicate that this kit provides features found in higher priced products at an affordable price point, it cannot be denied that the SRTYGHW 700C 1000 W rear hub conversion kit offers excellent value for money.
Installation and Compatibility
This is a rear wheel kit so the installation process involves swapping out your existing wheel with the new motorized hub wheel and running electrical wiring from the controller to the motor. Anyone familiar with replacing a rear wheel on a bicycle understands half of what I am saying since you are essentially dropping in a new wheel and connecting any required drop-outs and torque arms associated with mounting it. Since this is designed for 700 C wheels you know ahead of time that your existing brake reach and cassettes will align properly which is why buying a kit specifically designed for your bike size is generally superior to trying to force-fit a larger or smaller wheel onto your bike frame using adapter rings.
It is the electrical wiring portion of installing a hub kit that tends to scare people away from doing DIY conversions and it is this aspect where this kit really delivers on its promise. The kit comes equipped with a dual-mode controller capable of operating under both Hall-sensor and non-Hall sensor configurations, and will automatically switch between them. While Hall sensors provide the best possible startup conditions for smooth efficiency, when either a Hall-wire connection fails or your motor is configured for sensor-less operation (which some motors require) the controller will detect this condition and immediately shift to non-Hall mode preventing issues commonly seen in improperly wired setups (stuttering/ failure to start). For someone attempting their first conversion project, this auto-switch capability adds an incredible layer of protection against making one of the most frustrating mistakes an inexperienced builder could make.
The kit also includes a pedal-assist feature (to allow users to use it similarly to a regular bicycle with a motor assisting their efforts) and a braking lever-mounted power-cut-off feature (when pressed the motor deactivates instantly protecting your drivetrain while stopped).
Who Is This Kit For?
This kit is designed specifically for riders of 700c road, gravel, or hybrid bikes. These are riders who desire to convert their 700c wheel bicycle into an electric commuter bike without having to spend money on a brand new e-bike. The 700c fitment is the reason for building this kit. Most budget conversion kits were created for 26-inch fat tire bikes, leaving many skinny tire road bike riders (and gravel bike riders) out of the fun. So, SRTYGHW built this one specifically for your wheel size. This makes it definitely worth looking at.
It's perfect for the DIY builder who wants to learn about how this all works, without spending time learning how to fight the worst part of the job. The dual mode controller that auto-switches between Hall and non-Hall modes eliminates the single greatest frustration associated with hub motor installation. That frustration comes from the exact moment after you plug every thing together, the motor starts humming, but won't spin. If you are converting a bike for the very first time, that auto-switch is the difference between completing the conversion in under a day, versus wasting an entire weekend reading through online forums trying to find help.
It is also for commuters who want speed and range. The 1000-watt motor and top speed of approximately 28 to 34 mph provides real power to get you where you need to go. Additionally, it allows you to stay right along side heavy traffic and gives you enough power to climb hills that a 250 watt kit would struggle to ascend. Lastly, it is for people who value simplicity. A gearless hub motor has fewer moving parts than a geared motor, thus fewer breakdowns and less maintenance over time. If your goal is a reliable, affordable, everyday electric bike built from a bike you already own. then this kit fits your job description.
But not everyone will want to buy this kit. If you ride a 26-inch wheel or a fat-tire bike, then this is the wrong size and you should look at other options in our e-bike conversion kits roundup. Also, if you want a bolt-on battery included so you can start riding immediately, remember that the battery must be purchased separately here, so factor that into your budget before you commit.
Faqs
What Type of Bike Does This Kit Fit On?
The motor & wheel are designed for 700-c wheels which includes 28 inch rims & 29 inch rims. Therefore road bikes, gravel bikes, and hybrid bikes with thin tires are the perfect fit. This is not made for 26 inch wheels or fat tire bikes. Please measure your rim before ordering.
Is the Battery Included in the Kit?
No. The kit contains only the motorized rear wheel, the dual mode controller, the LCD display, the throttle & PAS hardware, and the wiring. You will be required to purchase a 48-volt battery separately. Please read the product listing carefully to see exactly what comes inside of the box so you're not surprised.
How Fast Will This Kit Go?
Top speed of approximately 28 to 34 mph. Keep in mind that actual speed depends on rider weight, tire pressure, road grade, & assist level chosen. Treat the above range as an estimate based on real world performance.
What Does the Dual Mode Controller Actually Do?
It runs the motor using Hall sensors for smooth operation & efficiency. However, it automatically switches to non-Hall mode when it detects a faulty connection between the Hall sensor & the motor or if the motor is sensorless. This auto-switch saves you from common hub kit failure wherein after everything has been wired up together, nothing happens because the wiring doesn't match up correctly.
What Kind of Load Can the Wheel Handle?
According to the aluminum alloy wheel manufacturer specifications, the load capacity is rated at 264 pounds. A reviewer verified that the wheel handled that kind of weight easily. That should cover most commuter loads including themselves + gear.
Is a Gearless Motor Better Than a Geared Motor?
Yes -- reliability wise. A gearless direct drive motor has no planetary gears to strip out. Thus, there are fewer things to fail & much less maintenance needed over time. While geared motors are lighter & more aggressive off the line -- gearless is the smarter choice for long term reliability & low maintenance for daily commuting.
Conclusion
The SRTYGHW 700-c 1000 w kit solves a very real problem for skinny-tire bike owners who have been ignored by the budget conversion market. It provides a 1000-watt gearless motor, smart dual mode controller, and strong aluminum wheel to the 700-c world at a price point that is easy to swallow -- and early reviews confirm claims of quiet smooth low-maintenance performance. It is not a complete solution since you still have to buy a separate battery -- and it is only for use with 700-c wheels. If however those two conditions apply to both your bike and your budget -- then this is a kit that makes a lot of sense. Visit amazon’s current listing for SRTYGHW 700 c 1000 w conversion kit to verify contents of the box before you invest in building your kit. For additional information on pairing a conversion kit with your bike check out our blog section, along with our ebike conversion kits guide.