![IMG_20220122_145130.jpg IMG_20220122_145130.jpg](https://endless-sphere.com/sphere/data/attachments/175/175718-b24b1c52a02fedbecacf15b93076ca13.jpg)
Hi everyone, here is my e-road bike build.
This project has taken almost a year from the beginning to finish, and I am quite happy with the result.
The aim of this build was to build an entire high-end electric bike from scratch while kipping the cost as low as possible.
The objectives were :
-14.5kg max
-3000€
-good amount of torque (most electric road bike develop 35 to 55N.m and I thought it was low at the time)
-100km of range (with 1500m of positive climbing+)
-hydraulic disc brake
-1x chainring with a big cassette
-neat look
Motor:
I first decided to go for the m500 because it could deliver up to 95N.m of torque and was not too heavy (even if not the lightest).
Frame:
Once the motor selected, I went to a bikeshop to do a shimano bikefiting study. This way I was able to design the "perfect" frame based on my measurements. I have designed the frame using BikeCadPro, which is an awesome software developed for bike builders. When I was happy with the design, I looked for a titanium bike builder in China and found one who did a fantastic job. It took around 3-4 months between the 1st contact and the frame delivery.
Battery:
My guideline for the design was "Neo-retro". I wanted a tubular frame as in the old days, but with profiled rim and disc brakes.
As I was using this kind of design, the problem was to integrate the battery nicely. For this reason I had the idea to hide the battery in a fake water bottle.
I looked online and could not find a battery with a decent capacity and an aesthetic design, so I decide to build my own. In fact, I bought a cylindrical 10s3p which was built with sanyo cells 18650GA on my request and rebuilt the casing and wiring system.
While waiting for the frame, battery and other components to arrive, I bought a 3D printer and started the design of this battery casing.
here is the result of the final product (The paint job has not been well executed but the system work perfectly.
![IMG_20220122_145152.jpg IMG_20220122_145152.jpg](https://endless-sphere.com/sphere/data/attachments/175/175719-927c116154b1f2b212afa3e1b113a339.jpg)
To install or remove the battery, you just need to slide it on or out of its support and there you go
![IMG_20220122_145204.jpg IMG_20220122_145204.jpg](https://endless-sphere.com/sphere/data/attachments/175/175720-94282c03f936dc498199d43a597a72e3.jpg)
There no apparent cable on the battery which I think is nice, the cables stays on the support and the connection between the battery and the wiring harness is made with bullets connectors.
Brakes and Shifters:
At first I went for some sensah 1x11 shifter which works flawlessly, however, the brakes were some semi hydraulic from aliexpress and I did not like the filling. The rear derailleur is a shimano GRX812 and it works great with the sensah shifters.
I then wanted to invest in shimano grx810 shifters but could not find them in stock during several month. After a pretty long wait, I have finally been able to find the 600 version (which is in my opinion identical), and bought them.
Wheels:
I went for some 50mm profile carbon wheels, I bought them from EliteWheels (aliexpress), I was scared at first but they are just awesome.
Derailleur and cassette:
The cassette is a 11-42 shimano slx and the derailleur is the GRX 812 from shimano
![IMG_20220122_145227.jpg IMG_20220122_145227.jpg](https://endless-sphere.com/sphere/data/attachments/175/175721-74f6a354c8c213ea5eee724360abc073.jpg)
The cassette needs some cleaning but apart from that it is an awesome combination in my opinion.
Right now I have ridden the bike for 1500km and everything works like a charm. I live in near the Mont Ventoux (France) and its ascension was one of my first ride. This day I did 100km with 1500m of positive climbing and still have 15% in the battery.
The only thing I do not like about the bike is the motor itself, more precisely the esc. It cannot be configure and the assists modes that are present are too powerful for me. I understand that it is an mtb motor and thus it as been design for this application, nevertheless I would have like a feature to adjust the power of each modes (as you can find on the specialized eroad bikes).
final specs of the bike:
-15kg
-around 3500€
-120km 1500m positive climbing of range
-Grx600 brake calipers and shifters
-Grx812 derailleur
-11-42 cassette
-awesome look (in my opinion)
All in all, everything on this build went according to the plan, if I could change anything, it would be the motor, I would probably go for the m800 which would be better adapted for my use and would remove 1kg to this build.
I hope you will enjoy reading this post as I enjoyed building this bike !