Hyper Bicycles Shocker Mountain Bike, 20" Wheels, Kids Age Group 8-13 Years, Black, Child

Perfect size for my grandson. Shopped at all of the surrounding stores and online availability. This was the most reasonably priced for the features that were on the bike.

You'll need the allen wrench that's a bit thicker than the typical Ikea allen wrenches (5 or 6 mm) - the other tools are pretty common. The trickiest part of assembly is to remove one of the brake shoes so you can pop in the front wheel (don't loosen the front brake line). Once that's done, put the brake shoe back on and spin the front wheel before securing it in (adjust it so that it doesn't rub the break pads that much). One thing that was not in the instructions is that the hand brake levers were pointed down instead of forward at least for me (which makes it hard to reach the levers) - I wasn't able to loosen the bolts that tighten the handlebar to adjust it - if that's the case, you'll need to loosen one of the screws near the brake lever (with the allen wrench) to adjust it - on the left handle, you can just pull the lever up. on right handle, the gear selector is in the way so you have to turn the lever all the way around.

I was excited to receive this complimentary, 20" Hyper Shocker Boys' Bike, because my eight-year-old Grandson, Ryan, had already outgrown his 16” mountain bike. This was an opportunity for him to step up to this larger sized mountain bike with the following advanced features: Smooth, seven-speed, twist grip shifting; Linear pull hand brakes for both front and rear; Dual suspension steel frame with suspension fork; All terrain, 20” x 2.25 knobby tires mounted on spoked wheels; Three piece high performance crank; Quick-release seat clamp for height adjustment of the deluxe, padded seat; Colorful, bona fide, Hyper graphics (blue on black); and, Shimano Equipped; drive train, brakes, shifter, crankset, derailleurs, front and rear wheel hubs, chain, etc., of all component parts for total integration and engineering. Assembly out of the box took approximately forty-five minutes to include gathering up my metric sockets, Phillips screwdriver, Allen wrenches, Torque wrench, and 12” adjustable wrench. It took me another 30 minutes to read the highly elaborated, Bicycle Owner's Manual. This manual is very detailed and includes specific drawings and illustrations, which are especially valuable in adjusting the brakes and derailleurs. Additionally, the manual features valuable tips, do's and don'ts, along with the SAFE and proper riding procedures for the riders of this particular bike. TIP - I found it a great deal simplified to mount the front tire first, then proceed with the handlebars, adjust and align the front caliper brake shoes, pedals, then install and adjust the seat, reflectors, etc. The Owner's Manual does not really have a rigid, 'set-order' of assembly instructions to follow. But, if you mount the front tire first, you can then set the kick-stand up to support the bike in the standing position and install the rest of the bike parts much more easily. One bit of caution – do NOT over tighten any of the bike's bolts, nuts, or cable clamps. Use a torque wrench and follow the recommended pounds per inch, or, foot pounds. If you do not have a torque wrench – just use your best judgment – tight, but not over tighten. The trickiest part of the bike assembly was installing the front tire to the fork. Either one of the brake shoes must be removed to allow the tire to slip into the front fork. Care must be taken to re-assemble the brake shoe with all of the washers and spacers in the exact order they were removed. TIP – I took a close-up pic of the washer placement with my smart phone before I disassembled it. It was simple to re-assemble the washers in the exact order using that pic. After installing the handlebar it was pretty easy to adjust the front caliper brake shoes. Just align the brake shoes against the rim of the front wheel and align with the curve of the rim. Then, follow the outlined procedures in the 'Brake System Adjustment' section of the Owner's Manual. Once I had the seat and handlebars adjusted for Ryan he put this bike to the 'test'. He had no prior experience with a 'shifter', so I explained the basics to him. Ryan found out he could climb hills in first or second gear, easily. And, on the downhill side he could shift into the higher gears for effortless riding. On streets and sidewalks he stays in his middle gears mostly. Ryan is getting the 'feel' for shifting up and down the range of gears by daily riding and practice. He has found out that he has to ease up a bit on his pedaling when shifting gears to keep the chain from slipping or falling off the gears. Now, after two weeks of riding this bike he is eager to tell Grandpa how it works, and for what conditions. Since we live in North Central Florida there are many kinds of year-round trails for him to ride on. We prefer the 'Rail-To-Trails' bike paths the best. Converted railroad beds into bike trails are very challenging. Although Grandpa on his three-speed rides along with Ryan on these trails it is getting harder and harder to keep up with him as he becomes more skilled with shifting and comfortable riding this mountain bike over somewhat challenging terrain. Thank You, Walmart! This 20" Hyper Shocker Boys' Bike has given me a chance to spend more valuable time with my Grandson, Ryan. I have enjoyed watching him learn the advanced features of this mountain bike through practice and having just the plain FUN of riding it. This is a great bike for local roads, sidewalks, and off-road terrain for any eight year old boy or girl on up to adult. This bike will support a person up to 220 pounds in weight. I highly recommend the purchase of this mountain bike for any adventurous kids in search of Fun. It just may kindle a spark of escapade and daring in your child for a lifetime of all terrain mountain biking.

My 9 year old loves this bike! The assembly was pretty straightforward after watching a YouTube video on how to assemble the brakes properly. One of the brake pads on the rear couldn't be loosened and rubs the tire a little more than it's supposed to but it doesn't interfere with how the bike works. This is a good sturdy bike and the design is cool enough for my son.

I recieved my bike 4/21/2026 and I paid for someone to assemble the bike and he told be the front wheel is bent out of shape so it will not ride well.... My son was riding his bike and it does not ride smoothly and well. If I take a picture of the bike you won't be able to see anything. Please can you send me a new wheel? Thanks in advance

The bike itself looks great and my son loves it! However after only 2 weeks of him riding it there have been many issues. The rear brakes do not release on their own all the way causing them to stick, the chain has popped off MANY times, and he keeps having issues with the gears not shifting correctly. The front rim was also a little bent upon purchase. I really wish this bike would hold together and last longer. My son just turned 8 so we were hoping he could get a couple years out of it. By the looks of it he may need a new bike before summer is even over. I would definitely stay away from this bike if you want it to last longer than a couple months.

Terrible experience the bike came delivered and the wheels didn't roll so when I went to return it customer service was terrible I called back 3 times and every time someone told me to do something different. Will never buy anything from Walmart again.

This is the second huffy or hyper bike we have gotten in the last couple years and it always seems to have a problem with the chains and the gear shift. my kid likes to go fast and then it starts clicking and starts shaking. he only had it for I think 30 hours at most and he's only wrote it 3 hours. I noticed it right in the first hour but he told me it was fine but then told me you can't handle it anymore. he's afraid of falling off of it like the last one. the last one I bought second hand so I thought it was wear and tear but the boy's parents told me that they went through three of them in the last year and they're all the same. the first one I got wasn't bad. it was made for toddler so it had a better brake system. and no, the bike wasn't put together 100% but the chain and everything was already attached to begin with. unfortunately I'm going to have to bring it back to mare

Poor quality. Bike was delivered assembled, even though that's not what I ordered ordered. It was later realized that the handlebars and brakes were not assembled correctly. Bike chain broken within a relatively short period of time. Although this is a cheap bike, the cost is not worth the investment.

This bike was for my 13yr old son he got it in September he was only able to ride it maybe 7 times before it was just to cold out. The chain popped off numerous times within the small windows he was able to ride it and as soon as it got warm he went to ride it one time and the chain popped off again and the gear shift broke so the bike isn't very sturdy I wish I could of taken it back but we couldn't because it had been past the time frame which sucks bc he was nvr able to actually ride it.