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GMC Topkick Dual Suspension Mountain Bike

by GMC
3.5 out of 5 stars 228 customer reviews
| 6 answered questions

List Price: $449.99
Price: $332.99 & FREE Shipping. Details
You Save: $117.00 (26%)
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In Stock.
Ships from and sold by Amazon.com.
Matte Black/Blue

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  • Assembling 1 customer-supplied bike per guidelines
  • Guidance on basic tuning and maintenance
  • Safety ride to ensure function and performance
  • Please allow an assembly window of 2 hours
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Estimate: $79.00
Fulfilled By: PDK Home Solutions
95% positive ratings (41 reviews)
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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
2 new from $332.99 1 used from $310.00
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Need help buying the perfect bike? Visit our Bike Buying Guide with complete information on bike types, best uses, and how to measure for the right bike size and fit.
$332.99 & FREE Shipping. Details In Stock. Ships from and sold by Amazon.com.

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Technical Details


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.

Product Details

  • Shipping Information: View shipping rates and policies
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B00J2LW2DG
  • Item model number: 32672-P
  • Average Customer Review: 3.5 out of 5 stars  See all reviews (228 customer reviews)
  • Amazon Best Sellers Rank: #129,228 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
  • Product Warranty: For warranty information about this product, please click here

Customer Reviews

Top Customer Reviews

Color: Black 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.
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Color: Black 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.
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Color: Black Verified Purchase
I got this bike for my husband for his birthday. I put it together in about 2 1/2 hours myself, and test rode it, seems to be working well. The toughest thing was adjusting the disc brakes, which I had never done before. I found it easier to adjust like this: loosen all four bolts holding the caliper assembly on, then lock the brake, tighten the two bolts attaching the assembly, release the brake, spin the tire while manually fine-tuning the position of the pads while looking head-on to see a little daylight on each side of the disc and hear no rubbing, then tighten the remaining two bolts a little at a time while maintaining the position of the caliper by hand. I also had to tweak the inside pad 1/4 turn counter-clockwise, but it worked well! Just need to see how my hubby likes it. The bike looks great, but is heavy. I will try to update this after he's ridden the bike for a bit.

UPDATE: He likes the bike, it handles well and is a good fit for him (he is 6'2"). I thought the handlebars seem a little low, but he hasn't mentioned this as a problem. I had to adjust the front brake one more time after he'd ridden it a few times, but now seems to be just right. Seems to be a good investment, I recommend to anyone looking for a good quality, dual suspension mountain bike at a very affordable price. Also, I just uploaded some photos of the bike so that you can see more detail, look for them to show soon on the product page.
2 Comments 51 of 53 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Color: Black
I am very new to mountain biking, and only got into it because of this bicycle. I have never taken bikes off road until I got this GMC Topkick (In reality, this is made by Pacific Cycles - cheap department store level of quality, for the most part). For a novice like myself, initially the bike seemed fantastic. As I continue to progress into the sport, the shortcomings of this bike are becoming very apparent, however, it is only a ~$300 bike. So, to be concise and to the point, here is my take on it:

PROs:
- Decent enough construction quality
- Perfect place for this bike is on city streets, negotiating potholes and other like hazards
- Comfortable seat
- Good looking bike
- Disk breaks that work very well! - few offer disk breaks at this price point
- Sharp and responsive rear derailleur

CONs:
- TERRIBLE front derailleur (no matter how many bike pros have tuned it, the chain rubs on the derailleur and the derailleur fails to shift downward often) NOT trail-worthy derailleur at all
- Handle bar height cannot be adjusted - I had to purchase a stem extender, as the default posture for the bike is very uncomfortable.
- The inter-tubes of the bike are what are called "Aero" design, meaning that they are a deep V.
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GMC Topkick Dual Suspension Mountain Bike, Matte Black/Blue
This item: GMC Topkick Dual Suspension Mountain Bike, Matte Black/Blue
Price: $332.99
Ships from and sold by Amazon.com
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