GMC Topkick Dual Suspension Mountain Bike
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- Assembling 1 customer-supplied bike
- Guidance on basic tuning and maintenance
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- 21-speed mountain bike features a full-suspension, strong aluminum frame
- Floating beam suspension design is mated to a Zoom suspension fork with elastomer/spring technology
- Micro shift push shifters and Shimano TZ-30GS derailleur
- Strong aluminum wheelset featuring V-shape rim profile and high-flange alloy hubs
- Front and rear Promax disk brakes work great, even in adverse conditions
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The GMC Topkick 21-Speed Mountain Bike features a full-suspension, strong aluminum frame that utilizes a floating beam suspension design that is mated to a Zoom suspension fork with elastomer/spring technology. The Topkick's drivetrain starts with Microshift push shifters. These shifters control Shimano's tried and true TZ-30GS derailleur. The drivetrain finishes up with a strong aluminum wheelset featuring V-shape rim profile and high-flange alloy hubs. Stopping is handled by Promax disk brakes on the front and rear. These brakes are vastly superior to rim brakes, especially under adverse road conditions. True to it's GMC roots, this bicycle is rugged, good looking, and built for the long haul.
Color: Matte Black/Blue
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Top customer reviews
The frame is robust and balanced. Much better than my first bike. It definitely feels capable of taking on a mountain trail without sustaining serious damage or throwing me off balance or sliding under me on a sharp turn. On the downside, it is a bit heavy compared to its kind. It tires you quite fast if you don't have the stamina for it. Luckily I already built that stamina with an even heavier bike, so it doesn't feel that heavy to me.
The suspension is rock hard out of the box, which is bad. I needed to dial it down a bit to get better contact in rough surface. It is still a bit too hard, but it'll probably get softer in the long run. It will definitely endure.
WHEELS AND HUB
This is where things start going south a bit. The wheels and rims are alright, but I can't say the same thing for the hub. Out of the box, the front hub axle was slightly bent at the tip (probably shipping accident), which makes me doubt its robustness.
GEARS AND DERAILLEURS
Being almost lowest end Shimano, the derailleurs are basically junk. Especially the rear one. In the first day, I tuned and returned the rear derailleur many times because for some reason it just lost its tuning. Second day, the rear derailleur just gave up on me. Decided to jam into the rear wheel and snap into two pieces when I was commuting to class. Needed to bu a new derailleur and change it myself. And ironically, the cheapest derailleur I bought holds better than the stock one.
The front derailleur has not wronged me yet, but I am doubtful after the incident with the rear one.
The shifters and gears seem to be working alright.
They do their job. Though they are not hydraulic, they still are soft enough to function with little force. One mishap, though, was that the handlebar part of the front brake has a tuning nut that is not so sturdy. Skipped once or twice when I was tuning it, but now it works just fine.
Cheap junk, will probably change with something more robust and fit for MTB.
Overall, I am satisfied with the bike. It needs some effort put into it in tuning out of the box. But once tuned (and fitted with a better derailleur), it functions pretty well. I would recommend it for starters and amateurs with a limited budget. It definitely helps build up stamina and experience for mounting biking.
The BAD thing I would like to inform about is the rear tire was flat, and found the tube to be punctured. I capitalize BAD because this was the case for BOTH BIKES. Each bike in their own box and packaging. What are the odds that BOTH rear tire tubes are punctured? Maybe the manufacturer has a disgruntled employee on the assembly line? Or their quality assurance program needs to be reevaluated immediately. None the less I hope the manufacturer learns from this so they can prevent further issues.
Besides that, great looking bikes. Can't wait to try them out as soon as I go get a couple of new tunes and install them. I am really glad that I decided to sneak in an assembly before Christmas otherwise my grandkids would have enjoyed only looking at the bikes on Christmas day. I have no doubt that the bikes will perform above expectations but will pass along any details should things arise.
So if you're one of those types that love a long distance, bike ride (or touring) this bike is for you, just make pretty sure that you got a large hike bag of replacement parts (Water and trail mix is VITAL!!) so you don't end up stuck in the middle of absolute nowhere. However, if you're planning to go on a cross country ride with this model, install reinforced shocks, slightly large disc brakes, off road tires with teflon strips (for more thorn resistance) if necessary install a dual crown fork for unforgiving terrains and utmost importance, GOOD BIKE LOCK!! NOT THE 1/2 @$$'D ONES AT WALMART!! For extra security and anti-theft procedure. Ride like you mean it, PEACE!!
Most recent customer reviews
I did some research for a decent mountain bike around $300 and this bike came up.Read more