21-speed road bike features a lightweight aluminum frame
Alloy calipers and ally brake levers
High-profile alloy Vitesse racing rims
Shimano derailleur and Shimano Revo shifts makes it easy to change gears quickly and smoothly
High-performance 700c tires are up to the challenge of rigorous street racing
The GMC Denali 700C 21-Speed Road Bike is built around a lightweight aluminum road bike frame for racing or commuting.
You'll stop on a dime with the alloy calipers and brake levers, and the high-profile alloy Vitesse racing rims look as
good as they perform. The Shimano derailleur and Shimano Revo shifts make it easy to change gears quickly and smoothly,
and the high-performance 700c tires are up to the challenge of rigorous street racing. Lastly, this road bike will help
you stay hydrated with the included alloy water bottle cage.
* Frame: Aluminum 7005 straight gauge
* Fork: GMC Series 7000 steel
* Chain: KMC Z 51
* Crankset: Prowheel Alloy 335P6 28X38X48 170mm
* Front Derailleur: Shimano FD-TZ 31 Index
* Rear Derailleur: Shimano RD-TZ30GS 7SPD
* Shifters: Shimano Revo SIS L2/R7
* Brake levers: Promax BL-250AP Aluminum
* Brakes: Promax 501A Alloy Caliper Brake
* Rims: Vitesse Alloy black 700CX14GX36H
* Tires: Kenda Black With Grey Band 7X28C
* Stem: Aluminum black EXT:100mm 0D.
* Handlebar: Maesbend W: 430mm D:22.0mm
* Saddle: Cionlli Black
* Seat post: HL Aluminum Micro Adjust 27.2 X 300mm
* Pedals: VP-990S plastic body with steel cage
* Weight: 29.0 lbs
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
The Right Accessories
When you make a bike purchase, don't forget these crucial add-ons:
* Helmet (this is a must!)
* Seat pack
* Hydration pack, or water bottles and bottle cages
* Spare tubes
* Portable bike pump