May 6, 20187 yr This is my ebike build. I bought a 36v 250w geared front hub motor kit, with the 36v 10.4ah battery included. I used a steel frame single speed, because the road bike i had wasn't suitable for the project. I had a little problem with the PAS ( not enough space for both magnets and sensor in the crankset), but i solved it with a small mod. For the excess cables i used tyre tubing for protection. I wanted to make it as clean as possible, what do you think? https://www.youtube.com/watch?v=al5XaPcGTk0 Edited May 6, 20187 yr by Vagos
May 6, 20187 yr Nice job as it looks quite tidy not always easy on a minimalist bike style. Which hub and controller did you use ? Edited May 6, 20187 yr by Nealh
May 7, 20187 yr Author Thanks, it was hard to hide the cables and i know it is not the best solution to have the controller in a plastic box, but i drilled holes for ventilation. I bought the kit from a local shop, but it didn't have a branding on, just some numbers. SY73626OL0517S1, that's on the motor. The controller is a generic 36v. Forgot to mention that the bikes weight is now 17.7kg ( before was 10.5kg). Edited May 7, 20187 yr by Vagos
May 7, 20187 yr Wow, thank you! Is that a good thing? probably. It's a standard Chinese motor from a long-established company. On the whole, they're pretty reliable.
May 9, 20187 yr Author Had to change the freewheel from 20 to 16 teeth, because at 30kph the pedals were going to fast. Now the cadence is way better, but after 31-32 kph i notice that the motor kind of stop working, is that normal? Probably due to lack of power?
May 9, 20187 yr 32 km/h is it's optimal speed rating, which would suggest the hub is wound for about 260 - 280 rpm.
May 9, 20187 yr Author Ah ok then. It's not a big deal, i new that was going to be the motors max speed. I wish i could go faster though, but you get what you pay for.
May 9, 20187 yr It will go a bit faster with 12s but to use 48v proper as 13s a new 48v controller will be needed you will then get up to 25% more speed..
May 9, 20187 yr Author It will go a bit faster with 12s but to use 48v proper as 13s a new 48v controller will be needed you will then get up to 25% more speed.. Maybe in the future, when the 36v battery gives up, i will upgrade, thanks. I will try to make a video while driving and post it, cheers!
May 23, 20187 yr Author I have a heatsink laying around. If i cut a small piece of the plastic box that holds the controller inside and use paste to join the heatsink with the controller, will that make any difference in heat chanelling?
May 23, 20187 yr Yes it should do as the heat sink will be in open air and have a bit of air flow over it when some of the plastic case is cut away, if the cut out is facing the seat tube then airflow will be more direct.
May 23, 20187 yr I have a heatsink laying around. If i cut a small piece of the plastic box that holds the controller inside and use paste to join the heatsink with the controller, will that make any difference in heat chanelling? Great minds think alike... I am going to do this to my controller too. I will grind the fins off the controller and use thermal paste to have better conducting of heat.
May 24, 20187 yr A small suggestion, for aesthetics, remove the pedal sensor from its metal ring. I'm sure you can make or find some part to attach it to the frame and it will look a lot better.
May 24, 20187 yr Author [mention=9614]Nealh[/mention] , yeaaah, the cut out will be facing backwards, so not so much airflow, but i guess better than the closed box... [mention=10356]anotherkiwi[/mention] , i will use some thermal sticker, but the heatsink wont stay on the controller. I may have to use zipties, or drill a small hole on the controller and bolt the heatsink on. [mention=19583]Andy-of-Leicester[/mention] , i want to take that ugly thing of, but i have to find an alternative way to fit the sensor.
May 24, 20187 yr I got a small tube of silicone thermal paste off ebay for about a £1.50, smear it all over and plonk the heat sink on it agitating the heat sink for adhesion. When you ride next the heat from the controller aids the adhesion.
May 24, 20187 yr [mention=9614]Nealh[/mention] , yeaaah, the cut out will be facing backwards, so not so much airflow, but i guess better than the closed box... Even rear wards air will cool the sink as airflow will probably cause a little unstable air behind you.
May 27, 20187 yr Author I'm thinking on upgrading my brakes. The frame is not discbrake compatible. So, i eather go the easy way and just get dual pivot caliper brakes ( for slightly better braking power), or try to fit discbrakes ( welding and more ugly actions may occur...), plus i'll have to buy a new back wheel or hub suitable for a discbrake. And on top of that, i'll have to make sure that the forks have enough space gor the discbrakes...thoughts?
May 27, 20187 yr The most important brake it the front as it is responsible for 75/80 % of braking, to accomplish this a fork change and a new disc hub will be needed as well as a HDB. Maybe another better option is to replace both with hydraulic rim brakes. Magura H33's are good esp with standard canti lever mounts price circa £130 for a new pair.
May 28, 20187 yr Even the HS11 will put you over the handlebars if you grab a handful ah the memory of feet at the vertical before the fall If you are more reasonable they will stop you on a dime, or 0.10€ or...
May 28, 20187 yr +1 for HS11's. Cheaper than 33's but still really effective. I've got front only with standard cable on the back. I'd say comparable to disc in stopping power.
May 28, 20187 yr Author Those HS11s are looking good as the best alternative to discbrakes i guess. But, are they compatible for a steel frame? And my reach is 75mm. And i noticed that they hook up like v brakes. I don't have v brakes, neither does the frame/fork compatible with v brakes... Edit... after some search i found out that those brakes are v brakes, so i can't use them and i don't want to mess with adaptors and welding. I think i will take the "cheap aproach" and order a set of DP Dia-Compe calipers for 25€/set. I hope they will make a difference in breaking power... Edited May 28, 20187 yr by Vagos
Join the conversation
You are posting as a guest. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.