July 5th, 2009 
admin 
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 SpecificationsFrame: 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 28×38x48 L170mm Front Derailleur: Falcon MF 31 (more…)
Posted in 
Tags: 
3.0 out of 5 stars
Alright for the price
I picked this up for $100 even, its an ok bike. I find the tires/rims combination to be awkward, the deep V rims are so very narrow compared to the wider knobby tires.
4.0 out of 5 stars
Good, but not great.
I paid for overnighting my package, which didn’t arrive for two days, but that’s besides the point. The assembly was simple.
4.0 out of 5 stars
Good quality, good price
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.
1.0 out of 5 stars
Rear brake always grips the wheel
The rear disc disc brake was found to always touch the disk, slowing down the bike quickly. Loosing the brake pad to make some space resulted in rear brake not functioning.
3.0 out of 5 stars
Rare Inner Tubes…
First, based on my experience, don’t rely on the specifications posted here for the GMC Topkick Dual-Suspension Mountain Bike; actual parts used and their specifications may vary…
2.0 out of 5 stars
Get something else
This bike is not worth $300 but if you could get it for the $150 some reviewers got it for that’s a different story. It’s heavy and very slow.
5.0 out of 5 stars
Great bike for most users
I purchased this bike because the price was great and it came with dual suspension and front/rear disc brakes.
4.0 out of 5 stars
Excellent choice for the price
I’ve had the GMC Topkick for almost a month now, during which I have been using it daily (home-work); it has also been put to the test on a biking trail in a nearby state park…
4.0 out of 5 stars
Great Value…Worth the Money!
GMC Topkick Dual-Suspension Mountain Bike
Amazon came through again with the best price on the web. It was such a good deal that I bought two!
4.0 out of 5 stars
Good bike for the money
Let’s put it this way: If you don’t know how to tune dérailleurs and brakes, you’d better learn it now or shell out your dough for others to tune.