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Product Description
Amazon.com
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:26 inch MTB Tread
- Stem: A-head TDS63K-8 EXT:100mm 15D
- Handlebar: HL-MTB 153 W: 600mm R:30mm
- Sadle: Padded Foam
- 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
Product 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
Product Details
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Customer Reviews
Most Helpful Customer Reviews
95 of 100 people found the following review helpful
By cdog
Amazon Verified Purchase
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.
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.
62 of 65 people found the following review helpful
By F. Moreau
Amazon Verified Purchase
I purchased this bike in February of 2009. I was looking for something to improve my cardio health but wasn't sure that I would really enjoy biking. After seeing numerous ads in the online classifieds of nearly new $1000 to $2000 bikes being sold for substantial discounts after being ridden for only a few miles, I decided to err towards caution in my initial purchase. I was hoping that by purchasing a mid priced bike I should get a reasonable quality components and not be deterred by a low quality bike. Assembly was basic requiring me to attach the front wheel, handlebar, pedals and seat. Everything else was preassembled. Pretty simple really. Inflate the tires and in 45 minutes it was ready to ride.
I am 58 and live in the mountains in the Pacific Northwest so I was looking for a full suspension bike, mostly to ease the shocks and jolts from riding on bumpy chip sealed roads. Since I was looking for a bike for exercise, weight of the bike was not a huge factor to me.
Having not owned a bike since my 20s, I was unfamiliar with the improvements in cycling. The 21 speeds seemed a bit of overkill to me at first, but now I find it well worth having in the rolling hills in my area. The push button indexed shifters were a real treat to me and easy to learn. The rear derailleur shifted extremely smoothly with no jumps clicks or clatters especially in the upshift. It simply changed ratio and I could feel a little extra resistance in the pedals as I gained speed. The front derailleur is a little less sophisticated but it works adequately. The disk brakes are a good idea in the wet region I live because they are far less likely to lose effectiveness due to getting wet. I remember rim brakes that would become almost ineffectual after riding through a large puddle. My only complaint would be the squealing noise they make at the end of a stop.
On flat roads the gearing is adequate to allow me to pedal along at 22+ mph until my legs tire, but it isn't designed to be a race bike. I have climbed some rather challenging but short hills (total of about 400' gain over a mile and a quarter) and pedaling like mad, I can climb a 12% short grade at 4.8 mph. The bike is heavy, approximately 37 pounds so it makes the hills a little more challenging. Over varied terrain on paved roads I can routinely average around 14 mph. Going down the above series of grades I have coasted up to 38 mph.
The only things I have found to be problematic are that as the bike breaks in, the cables stretch a little so the shifters need to be adjusted after a 100 or so miles. (Common on all bikes) The inner tube in the rear wheel failed at about 130 miles when the joint around the valve gave out while I was off the bike taking a photo. That brings me to a second problem, the tubes. Because of the deep V rims (which makes them stronger) they require a long schrader valve tube. Department stores carry the standard size but not the 48mm valved tubed this bike requires. I would recommend that anyone buying this bike order a couple of 26 x 1.9/2.125 48mm valved tubes at the same time.
The bike is fun to ride and so far, after over 700 miles, it seems very durable. The only problems were the aforementioned inner tube and derailleur adjustments. The seat isn't the best either, but unless you ride more than 30 minutes at a time it will do. The only changes I have done is to replace the saddle with a male gel saddle (I sometimes ride for two hours or more at a time), added a couple of lights for safety, a bike computer, a clamp to the seat post carrier rack (a cheap and effective dual purpose rear fender), and replaced the knobby off road tires with a smoother tire designed for pavement for lower rolling resistance.
Overall I am very pleased with the bike. The bike is good quality especially for the price. I have recently been test riding some higher end bikes and the only difference is that they are are significantly lighter and significantly more expensive. I would have no problem recommending the bike to anyone.
I am 58 and live in the mountains in the Pacific Northwest so I was looking for a full suspension bike, mostly to ease the shocks and jolts from riding on bumpy chip sealed roads. Since I was looking for a bike for exercise, weight of the bike was not a huge factor to me.
Having not owned a bike since my 20s, I was unfamiliar with the improvements in cycling. The 21 speeds seemed a bit of overkill to me at first, but now I find it well worth having in the rolling hills in my area. The push button indexed shifters were a real treat to me and easy to learn. The rear derailleur shifted extremely smoothly with no jumps clicks or clatters especially in the upshift. It simply changed ratio and I could feel a little extra resistance in the pedals as I gained speed. The front derailleur is a little less sophisticated but it works adequately. The disk brakes are a good idea in the wet region I live because they are far less likely to lose effectiveness due to getting wet. I remember rim brakes that would become almost ineffectual after riding through a large puddle. My only complaint would be the squealing noise they make at the end of a stop.
On flat roads the gearing is adequate to allow me to pedal along at 22+ mph until my legs tire, but it isn't designed to be a race bike. I have climbed some rather challenging but short hills (total of about 400' gain over a mile and a quarter) and pedaling like mad, I can climb a 12% short grade at 4.8 mph. The bike is heavy, approximately 37 pounds so it makes the hills a little more challenging. Over varied terrain on paved roads I can routinely average around 14 mph. Going down the above series of grades I have coasted up to 38 mph.
The only things I have found to be problematic are that as the bike breaks in, the cables stretch a little so the shifters need to be adjusted after a 100 or so miles. (Common on all bikes) The inner tube in the rear wheel failed at about 130 miles when the joint around the valve gave out while I was off the bike taking a photo. That brings me to a second problem, the tubes. Because of the deep V rims (which makes them stronger) they require a long schrader valve tube. Department stores carry the standard size but not the 48mm valved tubed this bike requires. I would recommend that anyone buying this bike order a couple of 26 x 1.9/2.125 48mm valved tubes at the same time.
The bike is fun to ride and so far, after over 700 miles, it seems very durable. The only problems were the aforementioned inner tube and derailleur adjustments. The seat isn't the best either, but unless you ride more than 30 minutes at a time it will do. The only changes I have done is to replace the saddle with a male gel saddle (I sometimes ride for two hours or more at a time), added a couple of lights for safety, a bike computer, a clamp to the seat post carrier rack (a cheap and effective dual purpose rear fender), and replaced the knobby off road tires with a smoother tire designed for pavement for lower rolling resistance.
Overall I am very pleased with the bike. The bike is good quality especially for the price. I have recently been test riding some higher end bikes and the only difference is that they are are significantly lighter and significantly more expensive. I would have no problem recommending the bike to anyone.
51 of 55 people found the following review helpful
By UART
Phenomenal bike! That is all I can say, especially for the price. Ideal for casual riding. This bike however came with instructions and was purchased from Dunhams in Michigan for about $200.00.
Pros: Stylish, Appealing, both aluminum and steel build, and the full strut suspension system gives it a comfortable ride. Disc brakes are very nice, too!
Cons: (applied to stock build only) After long rides the pedal-bearing hub assembly becomes tightened, very difficult to pedal forward until you reverse-pedal. The rims are too narrow and the high knobs will cause the tire to twist making it difficult to ride sideways on concrete slopes at 45 degree angles or more, The rear suspension system makes is difficult to buy accessories such as a rear tray or basket, The rear derailleur causes the chain to "jump" only during high speed/heavy torque conditions (rear derailleur=7 front=3)
Overall: BEST BANG FOR YOUR BUCK. It's a beautiful bike that grabs alot of attention everywhere I go.
Facts: I am solid, 200lbs 5'10" from Michigan, Ride bikes an average of 4hrs/day, in harsh climates/terrains, (Mich. area) and daily commuting 7 days/week. I'm tough on bikes, and haul groceries with my trailer attached to it.
(good job, GMC/Kent bikes)
Pros: Stylish, Appealing, both aluminum and steel build, and the full strut suspension system gives it a comfortable ride. Disc brakes are very nice, too!
Cons: (applied to stock build only) After long rides the pedal-bearing hub assembly becomes tightened, very difficult to pedal forward until you reverse-pedal. The rims are too narrow and the high knobs will cause the tire to twist making it difficult to ride sideways on concrete slopes at 45 degree angles or more, The rear suspension system makes is difficult to buy accessories such as a rear tray or basket, The rear derailleur causes the chain to "jump" only during high speed/heavy torque conditions (rear derailleur=7 front=3)
Overall: BEST BANG FOR YOUR BUCK. It's a beautiful bike that grabs alot of attention everywhere I go.
Facts: I am solid, 200lbs 5'10" from Michigan, Ride bikes an average of 4hrs/day, in harsh climates/terrains, (Mich. area) and daily commuting 7 days/week. I'm tough on bikes, and haul groceries with my trailer attached to it.
(good job, GMC/Kent bikes)
Most Recent Customer Reviews
5.0 out of 5 stars
Great bike!
This was a present for my son who is currently stationed at Ft. Irwin, Ca. He is really happy with this bike. He uses to get to work on post and does trailriding with my grandson. Read more
Published 6 days ago by david brown
1.0 out of 5 stars
Total Weight 200 Pounds!
S****. I weigh a couple over that.
What am I supposed to do with a mountain bike that says I can't ride it?
What am I supposed to do with a mountain bike that says I can't ride it?
Published 11 days ago by Chuck Pelto
1.0 out of 5 stars
lesson
The components of this bike are cheep cheep cheep cheep cheep !!! It cost me more money in the long run too finish my project! Can I have a do-over ?
Published 16 days ago by Pen Name
3.0 out of 5 stars
Assembly Quality
The bike arrived as described. The bike was assembled. Rotated pedals and clicking noise could be heard. Front and back disk screws were not tightened proper. Read more
Published 21 days ago by Brad Potier
5.0 out of 5 stars
Very Pleased with the GMC Topkick
First, I was pleased with the way this bike was packaged- the packaging engineers did a great job. I assembled the bike in about 30 minutes with no problems (remove from box; cut... Read more
Published 1 month ago by Mike K
5.0 out of 5 stars
Very Happy!
I bought this as a gift for my husband (he had it on his wish list), I was a little hesitant ordering a bike online, especially for so much $ and read so many reviews that it made... Read more
Published 1 month ago by Jenifer D. Jones
5.0 out of 5 stars
Cool MTB with perfect geometry.
I bought this bike on last June 8, 2012.
I ride it over 1 hour everyday, because I use it for transportation between home and office. Read more
I ride it over 1 hour everyday, because I use it for transportation between home and office. Read more
Published 2 months ago by JOUNGWOO
5.0 out of 5 stars
Bike
I bought this to converted it to an electrical bike I love it it gets me to work every day now it's time to up grade on the my motor
Published 3 months ago by Steven Dawes
3.0 out of 5 stars
returned
wasnt what i was looking for was hard to tell in picture what the frame looked like. Wanted a rounded frame
Published 4 months ago by Rebel
4.0 out of 5 stars
GMC bike Paul Reichert
Bought this bike in Nov. 2012 haven't had a chance to ride so can't give review as of yet. It is a good looking bike, but the emblem on the handle bar stem is loose and will be... Read more
Published 4 months ago by prdog44
Listmania!
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