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If it was for me I would have given it a try, but it's for someone else so I think I'll play safe !

Anybody tried this - seems to have pas sensor and controller built in ? https://www.topbikekit.com/215kg-tbk100adk-cst-cassette-36v250w-motorinnner-controller-and-speed-sensor-p-1192.html?zenid=0relc5lr9957rfjt2mu6ercvs5

Not exactly a photo finish !

It's for my friends wife, I'm going to keep it relatively light, so hub motor - a 280 rpm TBK100AD CST (2.1kg) and either a 36V bottle battery or a downtube battery. I know its a bit heavier but I think a downtube battery would give a bit more range - I seem to do much higher mileages on my...

There's loads of Boardman Hyb 8.6 s around of facebook for <£200. I'm converting one at the minute and it has hydraulic brakes, nice big frame triangle, square taper BSA bottom bracket , fixing points for a rear rack and mudguards , 11.2kg - ideal donor bike

She just sailed up here :-) where some of her super fit friends on ebikes were struggling Shop lane from Botton, in the North York Moors

Would you be able to map your route on mapometer and tick the show elevation and show gradient tick boxes to get another estimate of the gradient ? Yes , the right hub motor will very probably get you up that hill (especially as you are relatively light). Woosh do a DWG22C 48V 60NM rear hub...

////// tsdz8 !

I'm doing something similar but to a Boardman Hyb 8.6. Is it a mid drive or hub drive ebike kit ? The route I am going down is getting a TBK100AD CST rear hub motor (quite light at 2.1kg) and then getting the rear wheel built here (possibly using the original rim if it has the right number of...

No, I'm no expert but I think it can't be 48V 30Ah 13s3p, maybe 10Ah - well dodgy

Just contacted Arrow Wheels "Hi Peter, Yes shouldn't be a problem, if it has the same number of spokes as your existing wheel the would be able to use the rim from that bike or supply a new rim if needed. Rims are around £40.00 Labour £45.00 Sapim 13g stainless spokes and nipples £22.00...

https://a.aliexpress.com/_EJeaQpq I had a conversation with tbk That wheel size sounds wrong ? should it be 622 mm ? I could find somewhere in the UK to build the wheel ?

I was thinking rear cassette and down tube battery, she had a Pendleton e-bike but she found it a bit heavy and clunky, so I was thinking something a bit more lightweight. I think 36v would be fine. What rear motor did you use ? ETA "Yes Peter, I have the bike it came yesterday, far better...

My friend asked if I could convert this for his wife Any ideas ? She's very light 60 kg, bike is 11 kg, reasonably flat terrain that they cycle on Any thoughts ?

I know people get attached to their bike, but it doesn't mean it's a good candidate for conversion. As @saneagle says buy a bike off Facebook marketplace with disc brakes, a normal square taper bottom bracket and a decent size frame triangle. I converted an old Gary fisher MTB for my sister...

The other option is to buy a second hand bikes off Facebook marketplace / Gumtree / eBay and fit (or get someone to fit ) a conversion kit

Thanks @saneagle - that was very interesting, I changed the motor to an XF07 and then a AKM G75 with 20" wheels and used 15A and 18A controllers and played with the gradient and the throttle (current based throttle) and as you say for the same speed, for the same gradient the motor running at...

I think I would stick to one of the suppliers that has been recommended here

Yes - I remember. So if a 36v hub motor has a "no load" max speed of 21 mph (say) and a restricted speed on the flat of 15.5 mph, it is running at 74% of its no load speed, which will usually be around peak efficiency ? If you then use a 48V supply on the same motor then its "no load" max...

There's a couple of variations on that theme. I got mine from Yosepower, but you can get higher capacity ones off Ali express. I got this one : https://www.yosepower.co.uk/products/36v10ah-seat-tube-li-ion-e-bike-battery But they also do a frog battery (you will need 36v)...