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| |  | Strength Training | Home » » » GMC Topkick Dual-Suspension Mountain Bike | | | | | | | Description: | | Mens GMC Topkick 26" Dual suspension Bike with Shimano 21 speed index gearing~ For any service questions contact Kent at 1-800-451-KENT (5368) EST., for replacement parts, repair kits, tools and warranty information (or) www.services@kentbicycles.com | | | Features: | |
• 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
• Microshift 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
| | | Product Details: | | | Product Length:
| 52.0 inches | | Product Width:
| 27.0 inches | | Product Height:
| 7.5 inches | | Product Weight:
| 40.0 pounds | | Package Length:
| 52.0 inches | | Package Width:
| 27.2 inches | | Package Height:
| 8.9 inches | | Package Weight:
| 44.4 pounds | | Average Customer Rating:
|  based on 59 reviews |
| | | | Customer Reviews: | |
Average Customer Review:
Write an online review and share your thoughts with other customers.
1 of 1 found the following review helpful:
 Excellent entry-level mountain bikeJul 26, 2010
The bike is a steal for the price (I paid $250 in June 2010). It looks great, feels great and handles really well. I give it five stars because it works for me exactly/better than I expected. If you are a first timer or novice or have limited use, this bike works!
I did not assemble it - a friend did - so I cannot comment on that.
The bike rides as expected and as many have commented - it is heavy, but then again, you cannot compare it to a road bike. The shifter are good (occasional problems because of my errors). The ride is good. The front suspension is "very dynamic," i.e., it gives a little even on the smallest bump but you do not feel it (there is no way to compare with and without the front suspension and I do not know how to make it "less giving"). I have gone down a 30 degree incline rough trail and was not been knocked-off, so the dual suspension may be working (again, I cannot tell the difference).
The disc brake comments you may read elsewhere... I feel that those reviewers are expecting a lot for the money. First of all, most people go mountain biking it good weather and the advantage of disc brakes is moot (in this novice users opinion). Nonetheless, the brakes work fine.
My only gripe about the bike is that the front handle cannot be raised. I am 6'2" and need the seat to be higher to have a comfortable ride, and not being able to raise the front handle is a problem after long rides because of stooping down. I guess road bikers do it all the time and may be it is a problem for me because I am not active as I once used to be or I am not using proper posture during rest of the day. Also, the local salesperson was pushing a 29er. Maybe that is what I needed. Try out some bikes before you decide on the frame size (this one is 26").
Another thing that is not mentioned elsewhere is that the handle grip is pretty knobby. I wear some cheap weight-lifting gloves and that works out fine. I guess I will learn the advantage of that knobby-grip on a really rough hill someday.
I am not much into regular "exercising" and I have found a new way to get at least some cardio in every other day through this bike. There are some good trails close-by and I cannot wait to get on that bike. I have since bought at least $100 worth of accessories including a baby seat for my 2.5 year old daughter, helmets for us, gel gloves, computer, bike pump, etc.
All in all, if you are an avid mountain biker then this bike may not be for you. But if you are just starting like me, or are doing it for occasional use and light trails, and are not tall this is an excellent bike to purchase.
Good but here is how I made it betterJul 17, 2010
First, let me caveat this review by saying that I modified this bike to use an electric assist motor. I mounted the motor on the rear wheel and used a seatpost rack to put the electronics and battery in. The seatpost is connected via the suspension (otherwise the heavy battery and controller would have to be connected to the wheel and would experience more severe road shock, which I didn't want).
In all, the bike is a great deal for the money, and that's why I'm giving it 4 stars. The suspension is better than I expected and the the shifters and brakes worked fine.
I'm not going to go on and on about the "ok" parts of the bike, just know that if I don't mention it, it's fine. However, here are some gripes about certain parts:
BRAKES: The brakes are cheap disc brakes. They work fine, but are hard to adjust and I use this bike enough for that to matter. I replaced them with Avid BB7s, which bolted right on and are the best brakes i've owned in my life. This is probably one of the most critical upgrades you can get.
TIRES: The tires that come with the bike are knobby and fine for some road use with some trail riding mixed in. I bought two sets of tires, one set of slicks (for ~ 20 bucks each) and a set of carbide tipped snow tires (50 bucks each) for winter. I trade them out seasonally. They really improve performance.
RIMS: The rims on this bike are curious. They are SUPER narrow, but they have a wide tire squeezed into them. It's suprising how well this works. You would think the tire would flex too much in the turns, but I don't notice it (I run about 50-60 psi in the tires). However, the narrow rims are taller than most bike rims (maybe to make up in the structure area?). That does mean that the tubes have to have a long extender (40mm stems is ok 30mm is too short and it won't come through the rim so you can't inflate them)
SHIFTERS: My shifters are wearing out after a year of heavy riding (every day as a commuter). Also, I have noticed that my chain rings (the front sprockets on the bike) are bent relative to the axis of rotation. When I pedal, they wobble left and right and this causes the chain to rub on the derailleur. As a result, the derailleur has to be adjusted so that it won't rub and that means that I'm having problems shifting. This is probably not the shifter's fault, but I don't know how much you care about the bending of the chain rings.
FENDERS: You can put fenders on the bike. I have some. However, it's not optimal and they are a constant headache for me. The problem is that this bike lacks the right holes for standard fender attachment, so you have to get creative with wire ties and they inevitably fail at some point.
1 of 1 found the following review helpful:
Good bike for the moneyJul 08, 2010
This is a good bike for the money, but a few things I experienced:
All bikes will need adjustment from the factory. Mine shifted right out of the box, but not cleanly. It took some fine tuning to get it right. Budget a few bucks for a bike shop to do this if you're not comfortable doing it yourself. No bike is going to come out of the box ready to go.
This bike is not a great setup for light trail riding which is what I ended up mainly using it for. Its on the heavier side and the tires are very knobby which add considerable riding resistance. If you're looking to get a work out, this is fine, but be prepared to have to work extra hard to keep up with your riding buddies or other people on the trail. I replaced my tires with urban style tires and this helped tremendously.
This bike is a mountain bike, and as such, has a bent over, not-so-comfortable riding stance for long-distance riding. Again, if you're mainly going to be doing light bike trails like me, this might not be the best bike for you. I bought a stem riser which raised the handle bars 3" and this also helped out tremendously.
The rear suspension takes up valuable room for things like a second water bottle or rear rack.
Cliffs: For the price, I am very happy with this bike. New tires and a stem riser transformed it into a much more livable multi-purpose bike.
Gravel RoadsJun 14, 2010
I've had this bike for 6 months now and I agree that this is a great product. It shifted a little rough at first but it quickly broke in and now shifts great. I bought this particular bike because of the suspension and tires for riding on gravel roads. It rides a lot smoother on the gravel than I thought it would, potholes and loose gravel is problem with this bike.
As I learned the hard way, I would recommend getting a bike pump that you can attach to the accessory screws where the bottle holder should be located.
Very Good BuyJun 09, 2010
Bought this bike for my 15 year old sons birthday. He loves it because it had all the features he wanted; dual suspension, disc brakes, light weight. I am happy cuz he's happy and it didn't cost as much as the bikes at the expensive bike shop where he was looking....
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