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Greetings from South Dorset. Really muddy 2nd shakedown of my newly bafang mid drive conversion 26" MTB yesterday. Mixture of frozen icy mud and pools, and really thick gloopey mud. Got so thick at times, the chain was slipping in the higher gears there was that much mud on the drive train...

worth a read even just for the banter

Another vote for the 500c from me

The seller I used on Aliexpress for the Bafang motor is https://www.aliexpress.com/store/3625064 . They can ship from the UK, so you avoid the tax/import duties that I think a lot of EU sellers will now charge or you will be liable upon delivery. They didn't have stock in the UK at the time of...

https://www.ebay.co.uk/itm/173128318910 5cm wide by 600mm long - 5pk for £9.99

It's pretty straightforward, here a video guide You can get the BBS01b in either 250w or 350w 36v, I paid about £270 for the motor kit and about £180 for the 17.5ah battery (Samsung cells), both from Aliexpress sellers

I've converted my 26" MTB with a Bafang BBS01b mid drive. Good fun off road with 85Nm. I'm using the stock 44t chainwheel and a 11-40 9 speed Sunrace cassette, pretty much goes up most hills in top assist mode

The battery looks identical to the one used by the 1st/2nd gen Carrera Crossfire-e and Vulcan-e. The chargers and battery often come up on ebay. Yosepower use to sell the batteries with the chargers but they don't list them now

That Genesis was an epic bargain, wonder what the catch was?

actually you might be better off with this one, it comes with xt60 termination on the lead https://www.ebay.co.uk/itm/5-pins-Battery-base-Mounting-Plate-Bracket-for-electric-Bike-/233866880720?_trksid=p2349624.m46890.l49292

https://www.ebay.co.uk/itm/Battery-Plate-Hailong-Electric-Bike-Ebike-Frame-Mount-5-Pin-/124531954115?_trksid=p2349624.m46890.l49292

Got half way through listening to the 'expert' Ray, had to give up watching, was doing my head in

Good to hear it rides well. I might proceed with my plans, easy to revert if it doesn't work out. Your bike looks trick, I like it. The Curio tyres suit the bike

I have a 29er frame considering running it with 26" as cannot fit wider tyres as too close to chainstays etc... How's the handling of yours, and how do you find the bottom bracket now lower as a result of running smaller wheels? do the pedals clip the road easily?

All of that costs money, which would be added to the cost of the kit, I'd rather have the choice and pay less for the kit (I bought the gear sensor separately and took it off as I didn't like how it affected the power delivery)

I run a 10 speed 11-36 x 46t chainwheel on my 700c wheeled hybrid with a bbs01 Just about to build another bbs01 conversion with my 26" wheeled MTB , so will be using the supplied 44t chainwheel with a sunrace 9 speed 11-40, hopefully give me enough low down gearing for off road riding

I bought both the brake cutoffs and the gear sensor, ending up not using either. The gear sensor killed the power for too long resulting in stop start motion, and the brake sensors seemed too much faffing about for a problem that I found didn't exist

Ahh yes of course, assumed the bike in question was 26/28 wheel. All makes sense now.

The faster the motor spins the less stress on it especially on hills. Really struggling to see your logic