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GMC Topkick Dual-Suspension Mountain Bike |  | Brand: GMC
Category: Sports
List Price: $299.99
Buy New: $249.99
as of 7/29/2010 05:37 CDT details
You Save: $50.00 (17%)
New (3) from $249.99
Seller: Amazon.com
Rating:  59 reviews
Sales Rank: 1338
Color: Black
Batteries Included: No
Clothing Size: 26"
Size: 26"
Shipping Weight (lbs): 0.4
Dimensions (in): 52 x 27 x 7.5
MPN: 72670
Model: 72670
UPC: 016751726700
EAN: 0016751726700
ASIN: B000BT4W2C
Shipping: Eligible for FREE Super Saver Shipping
Availability: Usually ships in 24 hours
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| 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 |
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| Accessories:
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| Editorial Reviews:
Product Description
The GMC Topkick 21-Speed Mountain Bike can handle whatever road you ride. The full-suspension, strong aluminum frame utilizes a floating beam suspension design and is mated to a Zoom suspension fork that features elastomer/spring technology. The Topkicks drivetrain starts with Microshift push shifters. These shifters control Shimanos 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. Stop on a dime with Promax disk brakes on the front and rear. These brakes are vastly superior to rim brakes, especially under adverse road conditions. True to its GMC roots, this bicycle is rugged, good looking, and built for the long haul.
Amazon.com Product Description
Boasting a full-suspension, extra-strong aluminum frame, the GMC Topkick mountain bike is an ideal choice for both trail riding and rough city riding. The frame employs a floating beam suspension design mated to a Zoom suspension fork with elastomer/spring technology. This gives the bike a smooth, steady performance even on rough terrain. The Topkick's drivetrain, meanwhile, is outfitted with Microshift push shifters that control Shimano's tried-and-true TZ-30GS derailleur. The drivetrain also offers a strong aluminum wheel set with a V-shape rim profile and high-flange alloy hubs. And to keep you stopping smoothly in any circumstance, the Topkick boasts front and rear Promax disc brakes. Disc brakes are vastly superior to rim brakes, especially under adverse road conditions. True to its GMC roots, the Topkick mountain bike is rugged, good looking, and built for the long haul. Specifications: - Frame: 26-inch full-suspension aluminum MTB frame
- Fork: Zoom CH-386 suspension fork, 65mm travel
- Shocks: Kind Shock, adjustable to 650 pounds
- Chain: KMC Z51
- Crankset: Alloy ISA 335P, 28/38/48, L170mm
- Front derailleur: Falcon MF 31 T
- Rear derailleur: Shimano RD-TZ30GS SIS, 7 speed
- Shifters: Microshift TS-50 ADII index L3/R7
- Brake levers: GP 30 AP aluminum
- Brakes: LCHI DSK-320 disc brakes, 160mm
- Rims: Alloy black 26 x 1.5 inches
- Tires: Kenda black with yellow band 700 x 25C
- Stem: A-head TDS63K-8, EXT: 100mm, 15D
- Handlebar: HL-MTB 153, W: 600mm, R: 30mm
- Saddle: Velo, black padded
- Seat post: Alloy micro-adjust 27.2 x 300mm with quick-release
Amazon.com Product Description
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. GMC Topkick Mountain Bike Specifications
- Frame: 26-inch full suspension aluminum MTB frame
- Fork: Zoom CH-386 suspension fork 65mm travel
- Shocks: Kind Shock adjustable 650 pounds
- Chain: KMC Z 51
- Crankset: Alloy ISA 335P 28x38x48 L170mm
- Front Derailleur: Falcon MF 31 T
- Rear Derailleur: Shimano RD-TZ30GS SIS 7SPD
- Shifters: Microshift TS-50 ADII index L3/R7
- Brake Levers: GP 30 AP aluminum
- Brakes: LCHI DSK-320 disk brake 160mm
- Rims: Alloy black 26-inch X1.5
- Tires: Kenda black with yellow band 700X25C
- Stem: A-head TDS63K-8 EXT:100mm 15D
- Handlebar: HL-MTB 153 W: 600mm R:30mm
- Sadle: Velo black padded
- Seat Post: Alloy micro adjust 27.2 X 300mm with quick-release
Amazon.com Bicycle Buying Guide
Finding the Right Bike
To really enjoy cycling, it's important to find a bicycle that works for you. Here are some things to keep in mind when you're in the market for a new bike: The Right Ride
In general, bikes are broken down into three major categories: - Road and Racing Bikes--As a general rule, road and racing are built for speed and longer distances on paved surfaces. Thinner tires, lightweight 29-inch (700c) wheels and drop bars that allow for a more aerodynamic position are the norm. Most road bikes, regardless of price, offer many gears for tackling both hilly and flat terrain.
- Mountain Bikes--With their larger tires, hill-friendly gearing and upright position, mountain bikes are very popular for all types of riding, both on pavement and off. Mountain bikes that are designed specifically for rugged trail use typically feature a suspension fork. Some may have rear suspension, as well. A quick change of the tires on any mountain bike--even one that you use regularly on trails--adds to its versatility and makes it a worthy street machine.
- Comfort/Cruiser Bikes--For tooling around on bike paths, light trails, or for cruising a quiet beach-side lane, comfort/cruiser bikes are the ticket. With a super-relaxed riding position, padded seats, and limited or no gearing, these bikes are made for enjoying the scenery and having fun with the family.
The Right Price
A bike's price boils down to three essentials: frame materials, bike weight, and component quality and durability. - Entry-level--You'll find a wide range of comfort and cruiser bikes in this category, as well as some lower-end mountain bikes and road bikes. Most will have steel frames and components that are designed to last for several years with frequent use.
- Mid-range--Bikes in this range may feature a lighter aluminum frame with mid-range components that keep performing after miles of use. If you're looking for a quality bike that is relatively lightweight and will stand up to abuse, this is the "sweet spot." Most serious commuter and touring bikes fall into this category, as do mid-range mountain bikes with a decent front suspension.
- High-end--Racers and serious enthusiasts who expect lightweight, high-performance components will want to stick to this category. For road bikes, exotic frame materials (carbon fiber, titanium) and ultra-lightweight components can add thousands to the price tag. Mountain bikes in this class often feature advanced front and rear suspension technology, as well as components designed to handle lots of rugged trail action.
The Right Size
Fit is crucial for comfort, control, and proper power and endurance on a bike. Here are some basic bike fit tips: - Stand-over Height--To find out if a bike's overall height fits your body, measure your inseam. Next, determine how much clearance you'll need between your crotch and the top tube of the bike. For a mountain bike, you'll want three to five inches of clearance. A road bike should offer between one and two inches of clearance, while a commuter bike should have two to four inches. Compare the stand-over height for a given bike to your measurements (inseam + clearance) to determine the right bike height.
- Top Tube Length--You can measure your torso to get a good estimate of proper top tube length. First, make a fist and extend your arm. Measure from the center of your fist to the end of your collarbone (the part that intersects your shoulder). Next, measure your torso by placing a book against your crotch with the spine facing up. Measure from the spine to the bottom of your throat (the spot between your collarbones). Finally, add the two measurements (arm length + torso length), divide the number in half and subtract six inches. This is your approximate top tube length. Compare this number to a bike's posted top tube length. You can allow for about two inches longer or shorter, as most bikes can be adjusted via stem length/height and saddle fore/aft position to make fine adjustments to the fit.
- Bikes for Women--Proportionally, women tend to have a shorter torso and longer legs than men. Bike makers design women's bikes that offer a shorter top tube and many comfort/cruiser bikes built for women may also provide more stand-over clearance.
The Right Accessories
When you make a bike purchase, don't forget these crucial add-ons: - Helmet (this is a must!)
- Seat pack
- Lock
- Hydration pack, or water bottles and bottle cages
- Spare tubes
- Portable bike pump
- Gloves
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| Customer Reviews:
Showing reviews 1-5 of 59
 Good Mountain Bike;Bargain at $150 February 21, 2007
cdog (Colorado)
45 out of 48 found this review helpful
This is a good bike - the best feature is the dual suspension. Light and easy dropping off curbs on the way to work - huge difference from my hardtail mountain bike.
Disc brakes are nice to have, on front and rear - work much better than rim brakes. To adjust them hold the brake lever in and tighten them down via a hex wrench on the opposite center of the disc brake until the pads are flush against the disc, then turn back until the brake lever has enough play in it.
The rims are v-shaped, and narrow - much more so than my other bikes. It was quite a job to add tuffy liners to to the tires. I think I will have a bike shop change the tire next time they need it. The hard part is getting the tire off and on those narrow rims. The people at REI said to squeeze on the sides of the tire as you put it on, so both ends go deep into the rim.
Be careful when you put the front tire on that you have the fork facing forward. (I had it backwards the first time). Make sure the big round points on U part of the fork point towards the front of the bike.
The tires are very knobby. If you ride on the street a lot you might want to change them to something with a smoother tread in the middle.
The bike weighs 38 pounds put together - not exactly light, but since I ride for pleasure and exercise, and don't plan to race, the weight is fine.
If you get it for less than 150, (what Amazon is selling it for the week of Feb 20), it is quite a bargain. (disc brakes by themselves often add $100 to a bike).
I raised the seat pretty high for a comfortable ride at my height, and found the handlebars are two low. I fixed this by adding some handlebar extenders which allow me to be more upright when I am not braking.
To my knowledge you can't raise the stem on the handlebars without adding a spacer. If anyone finds out otherwise, please comment to this post.
Another possibility (besides handlebar extensions), would be to replace the handlebar with one that has more of a rise to it.
The Topkick is made by Kent Bicycle Company for GMC. They also make some Cadillac Mountain Bikes - the Cadillac AM2.4 and AM2.7, which are sold on Amazon. They are both dual suspension with disc brakes and have a very similar frame as the Topkick. Both bikes sale for over $1000.
Great February 7, 2007
Faraz Ahmad (usa)
6 out of 6 found this review helpful
This is a great bike.
However, the shipping dented the chain and it costed me 40 dollars to get it repaired/new one. I called amazon and they gave me a refund for the money i had spent in no time. I have to say, amazon customer support is great (at least off holiday season).
Great bike, needs instructions.... March 21, 2007
Thunderkatz
5 out of 5 found this review helpful
First off, I ordered this bike from Amazon at $150 on March 5th and was told 4-6 week delivery at mid April being the estimated ship date. Luckily, I got it by March 20th, assembled it, and just took it out for a test ride. Overall I am very satisfied, it is a very solid bike worth every penny.
As previous reviewers have mentioned, shipping quality isn't astounding, but it doesn't seem like I have any damaged parts other than slight frame scratches.
Assembly is quite tedious and the only fault about this bike I could really come up with was the lack of instructions (besides the bike being a little bit heavy) but it isn't hard to figure out. Only tools you need are hex wrenches and pliers. Mounting the front brake was confusing and tweaking it to align right was tricky, make sure you understand which way to mount and how to tweak before assembling the brake. Also, make sure you screw the pedals in completely. I failed to do so and the pedal snapped out of place while riding, although I was able to fix it.
The dual suspension is really nice to have as well as disk brakes (the main reason I opted for this model) and quick release tires/seat are nice. Seat is a little uncomfortable, shifting isn't that smooth, but both do the job.
The rear suspension takes up space in the middle. I mounted a pump and lock on it but no room for water bottle. The kickstand is not your average flimsy stick, very sturdy. Handle bars aren't the best but adequate. Be sure to tighten everything!
The bike was worth every penny at $150 (keep in mind that it came with a claimed 4-6 week wait), jumped to $260 as of today. I'd say if it dropped under $200, get it.
One well-designed, sturdy bike! November 15, 2009
Hanh Dinh (California)
4 out of 4 found this review helpful
After shopping around and reading reviews of other bikes, I decided on buying this one, even though it was on the higher end of mountain bikes under $300. I decided not to buy a road bike for two reasons: 1) the route I take to commute to and from work has many conditions unfavorable to road bikes and 2) the increased cost of road bikes. My commute is about 13 miles from home and I've been riding this bike for almost a month now 2-4 days a week. I can hop off sidewalks, run over speed bumps, go through gravel and dirt and the roughness/shock is substantially reduced due to the dual-suspension system on the bike. The brakes and gearshifters (after properly adjusting them) make a comfortable fit. The gears shift very smoothly from one speed to the next. The pedals, though made of a plastic composite, haven't cracked or broken yet.
Now onto the cons. One of the first things I noticed after riding is that my inner seat bones would get sore if I rode the bike for more than two days consecutively. Eventually, I had to replace the seat with something more comfortable. It's something any male bicyclist should do anyway because the stock seat (and many others with similar design) can cause impotence after long-term use. Secondly, the bike is on the heavier side weighing 38 lbs stock. There's not much to be done about this because the frame is naturally heavy. You can replace the tires and/or wheels, the seat, the handlebars, the pedals, and switch the disk brakes to rim brakes; but if you're going to do all that, you should probably get a more expensive bike that weighs less in the beginning.
Overall, I'm very satisfied with my purchase because I know that it's going to last me a long time. For the amount of money that it costed, if it does get stolen I can't get too upset. When I get tired of the weight of this bike (or if it gets stolen before then), I'll look into getting a more expensive, lighter bike.
Great bike...however.... September 15, 2006
Slyde (Planet X)
3 out of 3 found this review helpful
well i just recently got this bike. It came with no instructions...it was really easy to put together though. The front disk breaks have to be tweaked before its maiden voyage. Also the back gearshift needs to be adjusted before the first ride. Its a really nice bike for its price. Its a great bike i recommend it for anyone who likes dirt trails.
Showing reviews 1-5 of 59
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