Colossus G.0

Mens 29 inch Hardtail 21 Speed Mountain Bike

By Mantis

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$296.00 In Stock

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Description & Features+

The Mantis Colossus is the new way to go. The 29" wheels help roll along any surface. Whether it be on the dirt or on the asphalt the Colossus delivers with its front disc brake and Shimano rear derailleur. Find a new path to ride as you explore on the Colossus.

Frame/Fork: Steel hard tail frame, with steel suspension fork Wheels/Tires: Aluminum rim with 29 X 1.95 inch Wanda King mountain bike tires Drivetrain: 21 speed, 3 piece crank, twist shifters Brakes/Cockpit: Rear V-brake front mechanical disc, threadless stem, steel riser handlebar Extras: Kickstand


Available for Shipping to Canada Post
18 years and up
Supplier Warranty
Limited lifetime warranty on frame and fork. One year on original parts except tires, tubes, and cables.
Supplier Warranty Length
1 year
Product Identifiers
Walmart Item #
Model #

Return Policy+

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You can return this item within 90 days from the day you receive your online order.

There are two easy ways to return this item:

  • Return this item to a Walmart store
  • Return this item by mail

From the Manufacturer +

Ratings & Reviews+

Colossus G.0 is rated 3.1 out of 5 by 19.
Rated 4 out of 5 by from good for a big guy Bike shipped and arrived ahead of schedule big plus. Assembly is easy if you know bikes because the instructions are not for this bike. I had a few problems with a bent front wheel that was promptly replaced in 2 days fantastic job by the way guys it was really unexpected how great the service was!! on to the ride its solid I am a large man and it works for me the gears are not great and seem strange to shift but they will do for now. I would highly recommend this bike for large men that are looking for a cheaper first bike.
Date published: 2014-09-09
Rated 1 out of 5 by from Pass on this one Not really for a bigger person handle bars keep coming loose if you put pressure on them, hand grips seem small, seat is small and hurts my tail bone
Date published: 2014-10-20
Rated 3 out of 5 by from Very inexpensive bike, but.... Bike went together very quick and had to make only minor adjustments to get riding. Instructions are vague and cover 3-4 different bikes. I do not like that as you are flipping pages back and forth looking 'your' bike. I purchased this bike to street ride, not any off-road riding. Tires are a bit noisy on the street, but that is where I chose to ride. **BAD**I rode about 30-35 miles street cursing, not riding hard at all. I stood up to peddle hard one time and the right peddle axel broke through the plastic peddle casting. The peddles will not be able to stand up to any off-road riding. VERY disappointed with the peddles. I did not contact the manufacture because I do not want those peddles on my bike. I purchased a replacement full metal peddle set. Outer than the instructions and horrible peddles, it is a good buy.
Date published: 2014-09-15
Rated 1 out of 5 by from poor the bike does not have a stamped serial number on it. just a sticker. the sticker will fall off the first time it gets wet then who does the bike belong to if it gets stolen.
Date published: 2017-01-22
Rated 5 out of 5 by from mantis collosus mens bike This bicycle is lightweight and a very good bicycle. My son is 6'2" so this 29 inch is the perfect size. Thanks walmart for the fast shipping!
Date published: 2015-07-24
Rated 4 out of 5 by from Good bike for price Bike is good buy for money and occasional use. Front wheel is not true, which I can fix. Bearings are not the greatest. Like the way it shifts and is a comfortable ride.
Date published: 2015-02-17
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