Max1980

Thanks so essentially it's either file the dropout or add torque arms. Filings sounds doable

Thanks! Added some better picks. The axle drops right in but I've seen people go deeper so the anti rotation lock washer is fully within the dropout, then again I've seen people go a bit shallower too.

Do I need to file before final fitting or can I get away with as-is?

Ok so here is the running total so far - £100 - Bike, hydraulic brakes, front suspension £100 - Yose Power 48V 13A Battery £60 - Bafang G020.250.DC 13 Motor on a 27.5" rim £77 - 17A KT Controller, throttle, brake sensor, LCD3 display etc £27 - Schwalbe Marathon plus MTB Tyre £4 - Schwalbe innertube £3 - Schwalbe rim tape £23 - 8 Speed Cassette £5 - Brake pads £4 - Throttle Cable £10 - New Handlebars £14 - Hyraulic brake fluid kit £2 - Rivnuts Grand total = £429 I was getting a bit antsy last night so I powered on the kit just to check it is working. All good so far! Annoying having to wait for this rim tape but it's not the end of the world Just need to buy some sort of pouch for the controller and give the whole thing a clean.

Thanks mate, went for the 11-32T. Fits fine. Still waiting on other bits. I got a Schwalbe Marathon Plus SmartGuard MTB Tyre https://www.wiggle.co.uk/schwalbe-marathon-plus-smartguard-mtb-tyre Price seems good and apparently a great choice for eBikes. Of course I had no idea rim tape was a thing so now I need to figure that out too. Have you got any suggestions?

I think I'm going to avoid Aliexpress purely due to shipping times. If I can get a suitable 8 speed cassette I can get started right away. Do I need an 11-28 cassette or 12-32?

Ok so list of random parts - Shifters - Sram X4 8 speed Front Brake - Clarks Lever and Meroca M800 piston Hydraulic Rear Brake - XOD e-bike hydraulic (has cutoff built in if I buy the wire) Front Dérailleur - Shimano Tourney 7/8 speed Rear Dérailleur - SRAM X4

Thanks for the reply [mention=24131]Bonzo Banana[/mention] . Pics below. In hindsight I probably should have paid less since it's basically a bunch of random parts but here we are

Finally found some time to get back into the project. I managed to find an unloved Carrera Vulcan that used to be an ebike conversion for £100. Ideally I would have spent more for one in good condition but there isn't much available locally. It's a bit of a frankenbike at the moment unfortunately. Anyway - Couple of issues - 1 - The shifters are 8 speed but the rear cassette is a Shimano HG400-9 which has 9 cogs. I am unsure what size chain is on it currently. Does it matter if I can't get to the smallest cog? If so am I better off buying 9 speed shifters, removing a cog (assuming this is possible) or swapping for an 8 speed? I'm planning on paying a local bike shop to sort the gears out once I've got the wheel fitted at least.

Everything arrived today, just over 2 weeks which is pretty decent I thought!

Amazing thank you.

From what I've read on the SWXH it'll do 750W continuously no problem. 750W is enough to get up highgate hill, at 20mph without pedalling. According to Gribble it's 850W to get up the steepest part of Swains Lane - 14% gradient at 15mph without pedalling. As a worst case scenario, under 1 mile that sounds fine. Does that feel about right or are those numbers off? I have however read about some melting hall sensors wires at 1000W plus and getting hot at 900W. I believe the wires aren't rated for more than 20A so that explains it. I had no idea controllers worked like that, thanks. I've seen 25Wh/Mile throttle only. That should give about 20miles right?

Like a few others on the forum I just picked up this rear hub. Bafang G020.250.DC 13. I'm trying to figure out some basic numbers regarding speed. Purely interested in the numbers. I found an equation on YouTube - RPM x Wheel Size x 0.003 I assume you use the Load RPM and not the No Load number? For this motor that would be 205 (or 245) so in its original guise 205RPM x 27.5" x 0.003 = 16.9mph Then if run at 48V - 16.9 x 48/36 = 22.55mph I'm assuming this number is at the original 15A which seems to be the norm for UK Ebikes. Other ratings give; 17A = 25.4mph = 816W 20A = 30mph = 960W Are these all about right or am I messing something up here? I've just watched a video of someone pulling to 30mph on a 250W 36V motor with 48V battery but only pulling 600W. He doesn't mention The controller Amps but how is that possible? Shouldn't the watts be way higher?

Yeah that LCD8H looks amazing. Shame it wasn't in the kit I bought but maybe I'll get one once everything is up and running

I've got a Bafang G020.250.D/DC 13 pictured below and a 13ah 48V battery. Bike is a Carrera with Hydraulics. I believe the 2nd kit with the hydraulic break sensor is what I need. KT-17A controller. Can anyone confirm this is what I need? Can't find any UK suppliers without buying all the parts separately and hoping for the best! https://www.aliexpress.com/item/1005002001938081.html?spm=a2g0o.store_pc_groupList.8148356.11.34b76bdcODo0sC&pdp_npi=2%40dis%21GBP%21￡58.47%21￡44.44%21%21%21%21%21%402100bb4916546148856424383e4acf%2112000019332666620%21sh

I've seen a few Subway conversions, here's hoping it's straight forward! I'm looking at a Carrera Vulcan locally as it has front suspension and hydraulic brakes. Should be well within budget even with new wheels. The 27.5" size has limited the options somewhat but it's not a massive issue. Now to source a controller that won't take a month to arrive!

[mention=24131]Bonzo Banana[/mention] Yeah I couldn't wait It's a freehub I believe. The specs are all a bit confusing, my guess is it's just one model and companies just spec the windings and voltage they want. I'm guessing this was specced to hit the UK speed limit. I think most legal 48V kits use code 16 for the same reason. Just reading this thread and it seems Woosh used code 13 for their Rio which had the same hub. They say it's safe up to around 24mph at 48V which points to a 17A controller. Should be more than enough for me! That Saracen looks lovely! Can't wait to see the finished thing. This hub has definitely opened up the budget a bit. I think I can get into something second hand with hydraulic breaks and front suspension (bad wrists). Somewhere between £150-250.

And it’s here! G020.250.DC 13 Very nice find! Thank god it’s on a rim too

It's shipped, looks like I got the last one.. my guess is the original bike is out of warranty so they are selling the spares. They don't sell any other Ebikes with the same rim size.

Have ordered the hub, will be interesting to see what turns up tomorrow:) much appreciated, I'm quite excited now! Totally missed the controller connections, nice one thanks. Need get my head around that too. The KT-17A and LCD3 seem to be frequently recommended so that seems like the route to go, well within safe range for battery and can limit the maximum draw if needed. If I understand correctly the 36V hub run at 48V will give me 25-33% more speed and torque at the original 7-15A draw and still acceptable 30-60m range.

Wow that is really cheap! £150 for this and that's the whole kit (I think) for £200. https://www.amazon.co.uk/Conversion-Control-Controller-Display-Without/dp/B094VK2B2Y/ref=sr_1_10?crid=1V587ABSFNKS4&keywords=kit+lcd3&qid=1654387934&sprefix=kit+lcd3%2Caps%2C64&sr=8-10 This is the other one I'm looking at. I believe it's from the same line. BFSWX02 48V 500W - G020.500D/DC mode https://www.amazon.co.uk/Conversion-Wheel-Electric-BAFANG-Display/dp/B09R7TDWHJ?th=1&psc=1 I guess the question is whether it's worth spending more for the native 48v hub kit?

I am the OP.. just trying to learn that's why I'm here! I've found this kit which includes the same battery so I've got to assume a 500W kit will be OK https://yosepowershop.com/collections/e-bike-kit/products/e-bike-conversion-kit-48v-500w-26-rear-motor-fit-for-freewheel-with-48v13ah-down-tube-lithium-ion-battery-and-charger And the battery - 30A Max so 20 continuous should be fine? https://yosepowershop.com/collections/48v-battery/products/48v-13ah-e-bike-lithium-battery

Yes I think I'll be basing it on the kit since they are hard to get 2nd hand! There seems to be a few things I need to balance even when the costs are within the same ballpark. The choice right now seems to be Freewheel 1000W kit at £200ish vs Cassette 500W at £307 BFSWX02 48V 500W https://www.amazon.co.uk/Conversion-Wheel-Electric-BAFANG-Display/dp/B09R7TDWHJ?th=1&psc=1

Still looking into the specifics. Happy to take my chances on 1.

Yeah fortunately (or unfortunately!) this one is definitely new. The guy needed the 36v model and was just out of the returns period. I've seen this one but I don't fully understand the freewheel/cassette differentiation. What kind of bike setups work with freewheel motors? Should I avoid this setup entirely? https://yosepower.com/collections/e-bike-conversion-kit/products/48v-1000w-26-rear-motor-kit-for-freewheel