...who 3d printed some kind of doohickey that you can attatch to the battery to easily pull it out...

That's this guy here. It's a 3D printed cap, but it doesn't always fit due to machining tolerances of the bike frame and tightness of battery fit. He's redesigned it a few times, but isn't going to spend any more time on it. If it works for you great, and if it doesn't, tough. In Part 1 of his videos, he offered to make and ship the bits you need, and in this last video Part 3, he offers the 3D files to print your own. The links are in the Youtube Comment section(s).

 

I have just managed to buy a Fiido D4S. Had a shortlist of which bike to buy, headed by a Woosh Rambletta but unfortunately with a backlog of orders it would probably be August for that one.

I have saved over £300 by getting the Fiido and it is impressive.

I cycled a lot in my teens, 20's to 40's then had to give up through illness. Not been near since with a dropped foot and weak leg, now 59 but I thought electric would get me back on 'the bike'

If it proves worthwhile I will get a bigger and better one in the future but in the meantime this is quality. I would have preferred a removable / replaceable battery but hey ho.

you can unlock the maximum speed to about 32kmh easily. - I have one

there's a good far book group for support too

Just ordered one of these , next day delivery at reasonable price with mudguards , looking forward to it as i have a week off work.

Does anybody know if there is a total mileage reading on these(km). I did about 30 km first ride , but stopped about 4 times . I turned off the power a couple of times , it also turns itself off after 10 minutes , resetting to zero each time.

Press and hold the bottom button

Actually 35 km , thanks a lot for the info.

Pleased with the bike , apart from awful noise from brakes , especially front. Seems to be a common problem , hopfully can get rid of it or reduce it. Bike is good , one of the wire arms for the mudguards is bent and twisted so throws mudguard a long way of centre. The wire is strong so can't be bent/twisted without heat. I got 86km on first charge , mostly setting 2 and 3 and some throttle , fairly hilly , so pleased with that.

I've a Fiido D11 - different bike, but exactly the same Fiido brakes. My understanding is the pads are sintered/harder than usual resin - more prone to squeal than resin. Fiido's callipers only apply pressure from the left pad - the right pad distance from the rotor can be adjusted with a hex key but once adjusted is fixed in normal use. The noise issue is the disc resonating between the moving pad and the fixed one when the brakes are applied. Proper adjustment can stop that squeal.

 

As for your bent mudguard arm, as your bike is new, contact the seller or Fiido support: Provided you didn't bend it, Fiido would probably send you a new one under warranty. One of the things many buyers of cheap Chinese e-bikes overlook is the availability of spare parts - some Chinese brands stock and make no spares available, but Fiido pretty much stocks and sells everything needed to repair their bikes, and their prices are mostly quite reasonable too:

 

D series part – Fiido

 

86km (53 miles) is almost exactly the mileage Fiido claim (80km for your 10.4Ah battery). Who says all manufacturers exaggerate the mileage achievable? Thanks for confirming it.

Thanks for the info. I read that to adjust the brakes , loosen mounting bolts , hold brake on hard , re-tighten bolts.

I didn't bend the wire , it is very strong so can't easily be bent or twisted , i tried. I bought from a uk dealer , sent a picture , a to and fro of about 8 emails wanting a video of me fitting it for an engineer to assess. My last email seems to have done the trick and they are sending a replacement , the bit must be worth about £1.

Really surprised at the range , that was until totally drained. Setting 1 didn't do much unless going walking pace so used 2 and 3 and some throttle. Was on the edge of the south downs so not flat. Will cycle to work about 8 miles each way one day this week knowing i will easily make it.

How is the D11 , much nicer looking bike and handy to take the battery off to charge. What range do you get?

Yes, adjust brakes as you say, but you need to repeat that from time to time as the right pad wears and the gap increases again. Don't squeeze the lever too hard though or the right pad will end up always rubbing against the rotor. It's a knack you soon get the hang of it.

 

It's only very recently Fiido started including mudguards as standard for most (all?) of their bikes; they used to be a £20 option. It appears to depend on who you bought your bike from as to how good the support is: Buying direct from Fiido seems to give the best prices and decent support.

 

I did nearly buy a D4S instead of a D11. Yes, you can easily remove the D11 battery for charging. That suits my purpose as I use the bike for short hops between trains - carrying the battery in one hand and the rest of the bike in the other spreads the weight nicely. The problem for some is you can't lock that battery to the bike, so you need to take it with you if leaving the bike somewhere - but since you're taking both the seat-post and saddle, it must deter thieves.

 

I honestly don't know the range of the D11. As some reviewers have said, it definitely runs better with a fully charged battery so I rarely let mine get below 1/2 full. And as I'm quite heavy and use it mostly in top assist, my mileage wouldn't be fair/typical. But my range is comparable to my other branded-cell 11Ah batteries. Given Fiido are now making and selling 400,000 bikes a year, we'd be reading complaints if their batteries didn't deliver or were failing!

 

I do wish Fiido would offer "official" rear racks though. I've had to order one from China that looks right for the bike, but finding one that was a simple light-weight alloy design that takes 25kg and fits (I hope!) was difficult. Decathlon do a cheap steel/10kg load one for their B'Twin e-folder that would fit, and there are full-pannier versions in Germany, but too much for my needs.

 

But who can complain? IMHO both D4S and D11 are excellent value for the money, and given the easy supply of spares, should both be on the road for a very long time.