stormfeet

Just tested the switch: Let's see what Fiido says next

It was charged normally, nothing was ever done to it (hence my confusion) Fiido have come back with: "Can you cut the two white wires and short them together?Because I h suspect that the on button of the battery is bad." quote unquote

We opened the cover! (total novices) Fiido says to check the fuse, and in their videos, the fuse is a very obvious blade-fuse thing on the red cable. 2 things we noticed: 1. My seatpost doesn't seem to have an obvious fuse like in their videos. The cables lead to some plastic-wrapped circuitboard. Maybe it's much deeper inside? Should we try to pop the bottom cover, or from the top? Hesitant to force/break something 2. There seems to a slight burnt smell, but I have no idea if they are like that normally. Photos attached. Grateful for advice

out of interest, where can a BMS be ordered, if the issue is that?

If it's any help, here's a preliminary test we did, that we sent to Fiido before they replied sayingto open it up:

Thank you for the advice. The bike was purchased from a local vendor which has since closed shop, they couldn't compete with manufacturer's direct sales... Fiido support have come back saying it's out of warranty, but suggested some tests. As the battery doesn't power on at all (pressing the button on the batter itself, not connected to the bike), they suggested checking the 2 wires going to the button, and if the fuse might be blown. I'll get a voltmeter and test it this weekend, fingers crossed!

Hi! Has anybody with a Fiido experienced the following? Normal behaviour: 1. Charger in unconnected state (charger's LED shows Green) 2. Connect the charger to battery (charger's LED goes Red) 3. When fully charged, Charger LED is green again. In my bike, there seems to be an issue: 1. Charger in unconnected state (charger's LED shows Green) 2. Connect the charger to battery (charger's LED goes Red > for 2 seconds > then it goes green again) 3. After having been connected for 4 hours, there is still no charge on the battery at all. It's just a couple of months beyond the 12 month battery warranty Is there any fix I can do that avoids buying new battery?

dodged a bullet there, i was considering getting a T1 some months ago!

Vivescooters.co.uk does the cycle scheme for the Fiido D21 As an aside, I might be selling mine in the next few weeks, it's still under warranty until Feb 2023. My new office location requires me to commute home through some large parkland / marshes in the pitch dark, so for safety's sake a suspension bike is on the cards. The D21 is fine on roads/paths but it's a stiff frame ultimately not ideal for off-road.

True, i also found that some retailers (Vive Scooters in my case) sometimes offer the bike with a discount for direct sales, but this discount does not apply via the cycle scheme. In the end I bought directly just to save time, the difference was £80

May I ask which aftermarket shock you got for the rear?

"Less paperwork to be filled in on the shop's side" was what I got told by a bike shop friend. I have no direct experience, personally.

"Less paperwork to be filled in on the shop's side" was what I got told by a bike shop friend. I have no direct experience, personally.

I'm told that Green Commute Initiative is a decent alternative to the cycle-to-work scheme, and that it's quick and easy for shops and customers to register with.

I'm told that Green Commute Initiative is a decent alternative to the cycle-to-work scheme, and that it's quick and easy for shops and customers to register with.

Vive Scooters was the shop i got mine delivered from

Vive Scooters was the shop i got mine delivered from

I believe it's a twist throttle (with sustained power) that's not allowed. The D21 has a thumb throttle. There's printed text on the motor itself stating 250w. They sell such stickers on Ebay though. But with the tiny motor size it's pretty clear it won't be a bike physically capable of naughty speeds (unlike a 750 watt motor which is much larger). I've ridden past countless police in London who don't bat an eyelid. The D21 is available via the Cycle-to-Work scheme which means it's vetted for legality

Okay, first annoying bug found with the D21, specifically the spring located at the big hinge between the two halves of the bike, that which protects the internal cables from being pinched/damaged. Over a few weeks of use, my spring stretched and developed a wider circumference than it had originally. This led to the spring being unable to retract fully into the frame when the bike unfolds, and wedges itself preventing the 2 halves from clamping tightly shut. Pretty annoying. Called the dealer and was advised that this is rare but not unknown, the solution being "turning the spring counterclockwise while pushing it back into the frame." Alternatively, to cut the spring and replace it with a plastic cable-holder off amazon. Was assured this doesn't void the warranty. My spring is too wide now for the first option, so shall report back when the new cable holder arrives.

I've had a look at those photos, did not get the weld issue near the clamp. I do see a similar notch in the weld in photo 2 (seat tube meets top tube) but thought it was meant to be like that (for a cheap bike at least) Had had the D21 about 2 or 3 weeks now. It climbs small hills fine on assist level 3, even when pedalling in the highest gear. Downhill resistance of the Fiido is higher than normal-wheel-sized bikes, freewheeling is slow; I tend to get smoked downhill by the freewheeling normal pedal bikes. The Fiido climbs well enough to annoy them beforehand though! It's possible to be lazy and do the throttle-only gliding at 24km/h on flat ground, although that gets boring. The speed unlock trick (described above) definitely works, am getting a bit more than 15 mph on assist which is fine for commuting. Haven't managed to unlock the display (so my bike's display is still capped at 25 km/h), whenever I tried it reset the speed unlock so I had to do that again. It's no real bother, the bike will never touch 20 mph so no need to look at the display. Chain showed beginnings of rust, but a spray of ACF50 is an easy fix The D21 could benefit from folding into a more compact form, but other than that, I'm pretty happy with what it is and how it is.

Week 1 of the D21, loving it! It handles heavy traffic well. Doesn't fold as tightly as a Brompton and the halves don't lock together like the Onebot S6. Carrying it on the tube is a bad idea, but less squashed situations like the overground / trains seem easily doable. It's a great bike for the price. Might have discovered an unlock, but need a separate speedometer to verify this. It did feel a little faster after doing the procedure, although the bike's speedometer is hard-fixed to display 25km/h as it's maximum (i.e. it could have been more, it just didn't show on screen) "To unlock the speed on the newer displays, please try the below: Switch the bike ON whilst holding full throttle and the right brake lever for 15 seconds."

The Fiido D21 arrived yesterday! First impressions, build quality is nice, and components didn't require much tweaking out of the box. Swapped the grips and saddle. Gets moving quickly from a standstill, although the speed tops out very shortly after. Nimble on the street. Shall take it on light trails this evening.

True, i had my eye on the Fiido X. Their FB group seems to report some faults with the first batch (could be user error, in fairness) while the D11 seems to be a tried-and-tested design. I'll have a look again.

Thanks, wasn't aware of that. Is the display something that could be straight-swapped with a D11 display spare part?

Hi! New to the forum. Has anyone got the new Fiido D21 folding electric bike? On paper it seems to be the Fiido D11 that's been out for a couple of years, but has an added torque sensor. Specifically I'd be interested if the speed limit (for assist) could be tweaked similar to the D11. It's not designed to be a fast bike, but a few more mph does help. Thanks in advance!