Wooken Vivi Electric Bike for Adults with 500W Motor, 27.5'' Ebike with 48V 499WH Removable Battery, Up to 55Miles Electric Mountain Bike, 19.8MPH Adults Electric Bicycle with LCD Display, 7/21 Speed

I haven’t been on a bike in over 20 years. I’m 38 now and trying to get in more exercise. I searched all over for a 10 speed style bike and they were pushing $350.00 just for something decent- and that’s just for a manual pedal style bike! I happened to stumble upon this and I was a little skeptical at first about having a motor/electric..batteries etc. but after watching a handful of YouTube reviews on this bike, I was sold. I couldn’t pass it up especially for the price! The bike came packaged extremely well and it was overall easy to assemble. Weighs in about 40ish-lbs. It sounds a little much, but when you pick it up- it’s not bad at all. Only took about 45 mins to secure everything in it’s place. My packaging included a manual but if yours doesn’t, there are YouTube videos out there of people putting this bike together. I found those extremely helpful! I would recommend someone to assist you if possible. It’s a little awkward trying to assemble by yourself. The bike does come 90% assembled and they provide some tools to help assemble it. Just need to attach the handlebars, front tire, headlamp, secure the battery and pedals-add some air to the tires then off you go! The frame is incredibly well made and really solid! I made a few tweaks to the brakes so they don’t grab too quick and tight. You don’t want to be thrown over the handlebars! Also, take your time aligning the front tire. Make sure it’ spins freely without the caliper rubbing against the brakes. That took the most time for me, but yet again I’m a newbie and there was probably an adjustment I could’ve made to make it easier. I’m pretty tall, 6’3 so I bought a $15.00 gooseneck extension here off Amazon to help raise up the handlebars so I’m not hunched over when riding. If you’re over 6ft tall, I highly recommend it! Also, the seat on the bike is well made but not very wide, or much padding for the butt. I would definitely recommend upgrading to a wider gel padded seat for a more comfortable ride. The front suspension shocks can be locked/unlocked and has a sensitivity adjustment! I keep it unlocked so it absorbs the impact of bumps. Handle grips are comfortable and have a nice contour to them! All terrain, well made tires! I read some reviews that the tires are not quality. I disagree! It states on the instructions that the inner tubes hold up to 60psi of pressure. BAD BAD IDEA! DO NOT DO THAT! You will blow the inner tubes if you go that high. When you pump up the tires just go slow and squeeze into them until they are firm. Sit on the seat and test it with your full body weight until they are not flattening to the ground. That’s it. No need to over think it. The gears, and crank system on the bike are name brand Shimano. Might not be top of their line, but it’s a name brand quality piece! The gears function overall really smoothly. It might need a slight adjustment? But having owned this for three months I haven’t had any issues at all with the gear shifting. I only use a few gear settings and that’s it. If you’re ever unsure, don’t risk your safety. Take it to your local bike shop just to make sure everything is functioning properly! Performance wise, the bike is amazing! I’ve put 47 total miles on it! The indicator screen shows that the battery is still fully charged! Granted, I only mainly keep the pedal assist on one(when it’s needed) I will turn the pedal assist off when it’s not needed just to conserve the battery life. I haven’t hit a bunch of big hills on the bike- just around town/small inclines and declines. On level three, this baby packs a punch up to 21mph. For a bicycle, that’s pretty fast!! Don’t underestimate it, this thing takes off quick! There are two ways to use the motor/assist. The throttle on the handlebars and the pedal assist. On level one- start pedaling and you’ll feel the motor kick in and get you up to about 6mph. Once you hit the brakes it kills the motor assist which is nice. I keep the assist on level one(the lowest level) for working up small inclines. Still gives your legs the ability to pedal without burning yourself out. If you want to speed up the hill without pedaling, just click up to the second level notch. Use the throttle on the handle bars and you’ll zip up that hill with no problem at all. Also, it’s great if you just want to cruise the streets for a joyride without any peddling. Note: when you’re on level two & three just plan on not pedaling if you’re on flat pavement. You might be able to pedal if you’re going up a steep hill? But it’s best to just use the throttle on the handle bars when riding on flat terrain. The screen is super easy to use and easy to read. All the controls are laid out well and everything is easily accessible within a thumbs reach. Display screen lights up at night, the battery life, mph, trip distance, total distance, and a few others that I haven’t yet explored. I’m surprised how loud the horn beeps, and how bright the headlight is! I primarily ride at night and it provides plenty of light to see! Lastly, the charging dock is well made. The battery came practically fully charged. I did give it an hour of charge after unboxing it just to make sure all works properly. Nice battery life indicator light on the battery that shows green, yellow & red. Not sure how long it takes to charge a dead battery, but I think I remember reading it takes around 6 hours? So in closing, I guess the only dislike I have about the bike is the name, Tot Gaurd. Kinda tacky…doesn’t make sense. So I found a couple stickers with a Mountain on them and covered up the name. I also added a few decals to the battery just to give it a little personalization. Perfect-o!! The only real concern I have is riding this bike in the rain, or on really wet roads. I’d be afraid of the water affecting the display screen, battery and motor. As you know, electronics and water don’t mix so to be on the safe side, I wouldn’t ride it on rainy days. Second, I’m not too sure in regards to customer support and warranty? My best guess would be to go through Amazon as a chain of communication with the manufacturer. Aside of the gooseneck extension and bike seat being a little on the small side-it’s a short coming that every other bike has out of the box even at the 1k price points. For the money, this bike is worth every penny. 5 stars! Buy it! You’ll love it! Be free & ride on!

Good bike for the price. I give 4 stars because the original seat is in no way comfortable. So after buying a new seat the bike feels better. Rode the bike 15 miles and still had more than half battery life left.

We bought 2 of them, plus a trailer and a tandem for our son. They are so much fun to ride, even in our age and shape (old and round). When I got the first ebike, I had just been in a car wreck, and my arm was broken. Ben was in tech school and could not take the time to put it together. I did it myself with a broken arm, so that speaks to its ease of assembly. As the year and a half passed, I've added upgrades to the ebike to make it more functional. All in all, I'm really glad we invested in our ebikes and accessories. It was worth the money.

I have had this bike for nearly a year now, and use it for recreational riding with my son. He rides a small motorcycle, and I ride this bike so I can keep pace with him without exhausting myself. The bike is overall a great recreational ride, except for one crucial point: By far, the worst aspect of this bike is the brakes. They are the worst brakes I have ever had on a bike in my 45 years of riding. From day one, they squealed like a old car's worn brakes. From about a week into owning this, I had to tighten the brakes after every ride. They will frequently stop working five minutes into every ride, and I have to resort to Flinstones-style braking. I have destroyed a perfectly good pair of shoes because of these horrendous brakes. I will have to replace the entire braking system to fix the problem. Until then, I will not be riding this. This bike does NOT have the power for hills any steeper than (estimating) 20-25 degrees, more or less depending on your weight. I am 180 pounds, and I have to push the bike up hills steeper than that. UPDATE 1: I have recently decided that I want to keep riding this bike, so I started investigating the brakes. I have zero experience with disc brakes, so this is all brand new for me. After watching some YouTube videos, I found out how to locate and remove the brake pads. The braking material on all the pads is completely gone, so I ordered two sets of replacements (they are cheap, assuming I bought the right ones). I will update this as my experience unfolds. UPDATE 2: The brake pads arrived, and I was able to replace the front pads easily. With just the front brake pads installed, the bike stops reasonably quickly on both flat surfaces and on a slight incline like I have in my neighborhood. The pads I bought don't fit the rear brakes, so my rear brakes are non-functional. My riding environment is conducive to single-brake riding, so I will probably ride that way until I find replacement pads that fit the rear brakes. On the bright side, though, there is zero squealing from the front brakes now. UPDATE 3: I have had the bike for over a year, and I still ride it when the weather permits. It has been a great investment, and I'm very glad I took a chance on it. The new brake pads not fitting was my own fault. As the old pads wore down over time, I had tightened the calipers so much that there was no room for new pads (any new pads). After loosening the brake calipers to make room for the new pads, they fit like a glove. I have to replace the pads more frequently that I would like, but they're cheap (about $5 per set) so I don't stress over it.

New update, now have 573 miles still amazed how this bike has held up, 2nd set of tires original battery and I can get over an hour ride time. Update, after 248 miles this is an awesome bike. For the price point I have no regrets. I did a couple upgrades, fenders, bike seat, but otherwise the battery is great I have not gone further then 12 miles in a ride, but it doesn’t even touch the battery and I can get up to 21 miles an hour. No complaints. After 100 miles this has been a great bike!. I couple of miner things. The front brake has some squeak (not a big deal) I lost a bolt on the kick stand. Easily fixed with a replacement bolt from Home Depot. The main concern is the power charger that has a lose connection, so to charge a have to move the power cord. I have not contacted the company and can order a replacement for $30 on Amazon. So at the end of the day I paid $700 for a 500 watt E-bike with lots of extra features. Still very happy. Easy assembly, what I wasn't sure about the provided video showed me. LCD screen is very accurate (Trip miles, MPH). So far very happy! Also added orange fenders that match pretty good and of course got those on Amazon as well.

For the price paid this bike is just awesome. It hits over 26 mph with my 225 lbs self on it. With that said, the brakes are not even close to adequate for the speed. The brakes are grabby and not effective for downhill offroad. The lack of a functional rear refelector is minor, but important for safety. The provided one will not allow the seat to be properly lowered onto the post, it has to be left off at assembly. Will update in a couple months.

I am a 53 year old woman...not particularly handy but I put it together myself with no problem. I bought this bike for my son who is taller than me but he isn't using it, so I am! I am 5'4 and the frame is a tad big for me, but when I am riding it, it is fine. When I have my feet on the ground the cross bar is a little too high for my size. For the price, it is a great first electric bike. I live in a hilly area, and I do not normally bike where I live because it is not so fun unless you are really athletic! But now it is a blast to bike here! I feel like I am a kid again! It is easy to use...pretty basic, with three levels of assist. I don't know how long this bike will last, or if the battery will last long... and I haven't tested out how many miles it actually will do, but I have ridden it for 10 mile stretches and it is great with plenty of battery left. The brakes are a little screechy...I will figure out what to do about that eventually and I will replace the seat for a more comfortable ride for the ol' tush.

The cells they use in the battery are really bad and probably taken from used things. They are very cheap cells and are all different kinds, hence this is why the bike is so cheap. Yes I took the battery apart and its a sad mess. I own a vivi electric bike as well, its only 350 watt and will actually go 22 miles on only throttle. This bike no way, maybe 10 on throttle and thats being nice. The shocks leak, the light is bent, the tires are way cheap and scary, you must replace them right away. The neck is so low your butts in the air, I'm 6'2 and boy is it small for a 27 inch. Breaks squeak no matter what, chain is cheap, the charger for the battery gets so hot it's scary, and it has no fan...so beware. Anyway sending these bikes back is an awful terrible process so don't bother. Oh and you can not remove speed limiter via controller. Also you can't even find who makes the motor for these..it will go adverised speed but for about 1 mile. LOL! One more thing the battery indicator is way off, and NO its not the settings, or amp draw it just reads random. So yeah it's a rip off you get a very heavy bike with a bad battery, bad suspension, bad motor, bad brakes, bad riding position. And used cells from who knows what. ENJOY!!!!!!