banging noises as i pedal.
598338
Bike was great until it started to make loud banging noises as I petal which ruins the flow of my workout. Only used lightly on days i was unable to make to the gym for a year and a half.
2711429
Even after taking apart the hub and adding grease, it still grinds and makes clickity clackity noises.  We were afraid it would come out of gear while riding, so returned it, but JBikes was very disrespectful, unhelpful and and even acusatory.  It took them weeks to respond, even after we returned them and called a lot.
1799430
My ONLY complaint, mine sounds like there's a little metal piece trapped inside, and the noise can be a bit irritating. I'm sure it's an isolated incident though.
277619
LFO clicking sound when pedal was engaged.  Sounded nice.  But clicking noise could be heard beneath the effect. Corresponded directly with the rate of the effect.  Each volume dip was proceeded with a light click.  Made the pedal unusable. Returned.  I have tried the Rowin version of this pedal as well.  Same problem.  I have also read about this being an issue with the Mooer Trelicopter.  Check out the Amazon reviews for the Trelicopter.  You'll see that quite a few have mentioned this clicking sound. I believe the Mooer, Rowin, and Donner all share a similar circuit.  And therefore all share a similar design flaw. First.. I ordered a Rowin, then contacted Rowin. They sent me another due to the clicking.. it too clicked.  Then I ordered the Donner.  3 in a row! All had the same issue.  It is a shame.  They all sounded great, especially for the money.  But the clicking sound is a real buzzkill.
1944343
It says on the package "quiet ride wheel", but NO it's far from being quiet. The front wheel makes the loudest noise that almost broke our eardrums! not to mention it was very hard to pedal. Tried calling amazon, got disconnected 3 times after telling them the issue. After repeating my story 4 times, I finally got a return label for the item and a replacement. 30 minutes later that is... so I now just have to disassemble it and when the new item arrived, re assemble that one!!!
1122023
Hello.
Motor runs but doing too much noise, he slams !!!
1280697
Easy to mount and charges my Bolt quite efficiently.  It makes a strange thumping sound when I plug in the Bolt and sometimes at other times as well.  Very strange.
2057913
Having a problem with pedals coming off and they are on right just like the book says . Right clock wise and left one counter clock wise! And seem to start squeaking
3308089
I have had the item several months and now it makes a very irritating clicking sound on the left side.
Update: I have now used this for approximately 70 minutes a day for 5 months and the left pedal fell off. Outside of the warranty at this point. Do not buy this unless you want to continue to replace over and over.
920089
It makes lot of noise and then blows a fuse at 28 PSI
3387961
I was so excited to invest money to be able to do spin at home.  The bike was easy to put together and I couldn't wait to start.  Once I started riding I noticed that it made a LOUD noise.  My husband and I did everything to try to get it to stop.  I called customer service several times.  And finally the tech said that even though Spinner bikes do make more noise than most that it wasn't normal so they sent me an upgrade and after about 2 weeks the upgrade is making the same noise.. So like I said it is a good bike for your money if noise isn't going to drive you nuts while you bike!
3106154
I've used this bike 3-4 times a week for 5 months and now it makes a loud squeaking noise when pedaling.  I imagine those that initially gave it 5 stars will change their rating once they start experiencing issues.

**5/6/2018 Update**
Here is a summary of my support case (still ongoing)

4/18  opened case (provided all requested info:  name, address, receipt, serial #, description, item number on manual etc..)
4/23  Support - asked that I remove the pedals and rotate cranks to see if noise is present
4/23  Me  provided results
4/26  Support  asked that I provide a screenshot of proof of purchase (was included in original email)
4/26  Me  provided proof of purchase
4/28  Me  I asked for a status
5/3  Support  tells me Im no longer covered under warranty and Im asked to purchase replacement pedals (even though my manual states parts are covered for 180 days)
5/3  Me  asked when my warranty expired
5/4  Support  manufacturer warranty expires 90 days after the date of purchase
5/4  Me  my manual says 180 days (included picture)
5/4  Support  requests I submit a photo of front page of manual (even though I included item # from front page in initial email)
5/4  Me  provided photo
1154440
The bike arrived as advertised and was delivered in 5 days. Fast.  Bike looks and feels sturdy, strong, and fast.  I have inflated the tires, lubed the chains, and looking forward to breaking it in this weekend.
There is some clacking noise though, which i am trying to find out what and where, maybe the crank, BB or the hub.  seems like a common problem. found the same problem with other Mu Uno owners online.  because of this, the ride does not seem smooth and sweet, its like pedaling with a tick, tock, tick, tock.  Hope Dahon has looked into this.
I am planning to bring the bike to a local bike shop (there is no Dahon supplier in Dubai) to check the issue.  I hope that its not a big issue.  Otherwise, i will not buy another dahon bike online again.
2902227
Wheels are loud. In an office building this may matter.
927026
Makes noise if you're doing it right, what else is there to say
4044700
They squeak is this normal, will it go away sounds like a truck .
1461920
I have been using this bike since April 4 times a week and have clicking noises and, squeaking in resistant knob.  It is very difficult to reach anyone to ask questions and get it fixed.