Thursday, May 20, 2010

Mountain Bikes - Frame Designs

The chassis of the mountain is no doubt particularly important determinant of whether the motion could set the class or not to build.

 The following is that're available products, the higher the quality, the products are more expensive and if the materials used on mountain bikes to settle in large part on the amount that can be safeguards. In general, the clearer picture of the bike, the more expensive it gets. Special alloys have been developed to create the Sun MountainThis is because the last thing I would like a motorcyclist while driving is that the extra weight. The frames are the most difficult of the motorcycle must be relaxed. This is often particularly suitable for competitive cycling, but market forces always require that their decisions are different.

 Mountain Bike frame materials

 Cro-Moly frame Bicycle Cro-Moly that're C, often played a reciprocating mountain of goodwill. Cro-Moly its steel, butis difficult. On your way, Cro-Moly has the ability to smooth out bumps bending could not ride the motorcycle. There is no reason why you can not be properly equipped with Cro-Moly frame of the driver is not disturbed by the extra weight. As the Cro-Moly is used for bicycle racing bicycle frames under the driver should try to compare different materials under the bike. The extra weight of steel is prevented from competitive race, even if it is not so important if BergThe bike is made just for fun.

 C aluminum chassis and aluminum bicycle frames are lightweight materials are choosing more and more popular as the Cro-Moly. Aluminum is stronger than steel. to consider is stronger, the paint, which should lead to rigid structures bulky. cementation of aluminum with a stiffer ride.

 Carbon-C is a healthy material, although its main use is for the front fork of the bike. For carbonbe used throughout the body: the additional costs for the customer, however, the carbon fiber is light but sure to offer a unit performance really high.

 Titan Titan C is incredibly light and strong. This could be the best material for bike main power terribly sophisticated. The real reason to come, but perhaps the majority of mountain bikers and cyclists are competitive.

 bike frame mountain sizing

 Another important aspect in the consideration of a framework is its size. The correct size of a mountain bike is crucial, such as comfort and agility motorcycle is much more reliable. ATVs are smaller than normal road bikes made. To protect your skin with the right size, if the small mountain at least three inches are considered your standard road bike. Another way to put the bike between the legs with the tip touching the back seat. Lift the frontTurn to touch your hand. should be the front wheels, four inches of soil.

 Corners

 The angle of the bicycle frame translated dramatically, can function as mountain biking. More importantly, the Pinnacle tube angle and seat tube. The steep slope angles are perfect, while the angles are positive Slacker pedals for stability and high speed.

Thursday, December 31, 2009

Mountain Bikes Frames


New mountain bike... by ZekaG


Looking for the proper material for your frame depends on the biking involved. Many factors play a part in choosing the right frame material for you. Different alloys means different properties in strength or weakness so choosing the stead for your ride depends on a culmination of budget, style and landscape.

Ongoing progress in light weight and ultra-durable materials have continued to keep up with the curve and the growing number of mountain bikers throughout the world. It will be interesting to see the evolution of current materials into other synthetic or combined alloys that will push the limit with strength, consistent maneuverability and featherweight design. Typically the three major compounds riders deal with are carbon fiber, aluminum and titanium. These metals make up most of bicycles on the market, but vary in prices and attributes.

Titanium is among the more expensive but it has powerful corrosion resistant properties that rival even platinum. Titanium can be guaranteed to last past expectations and continue to maintain the same durability and appearance it did the day you bought it. This kind of high density metal provides support in those sweet spots on the bike that absorb the bunt of the impact. Light weight coupled with strength makes titanium a favorite among bikers. Titanium actually has the "highest strength-to-weight ratio of any metal." There are also no known health risks with titanium. Since the alloy is almost always pure, lead and other contaminants are taken care of. These traits together make titanium a smarter choice for all terrain riders.

Aluminum is vital for any bike, especially for those who intend to ride at night. It reflects light better than most metals and can help in safety. Chemical or physical vapor deposition is a process that can add a coating of aluminum to any metal to reflect light, so even if you don't want the entire frame made out of it, you can add a good shine to any other alloy or metal. The bike may not end up being as immortal as a titanium frame but aluminum holds its own as a decent alternative. The problem with this material is that the quality is never a sure deal and the purity changes from place to place. Aluminum will likely deteriorate faster than titanium and will be more prone to dents or contortions in the frame.

Carbon fiber is light weight and resilient to rain, weight and long term use. It is also malleable and able to move or bow according to suspension needs. The material is often found in shoes and helmets because of it's dexterity and flexibility. Carbon fiber frames do fail on being consistent with managing stress and the compound needs more studying before it is used to its best ability. This compound has the possibility of becoming an essential for long term cyclists, but as of right now has little success in the bike frame industry. It is simply not strong enough to conduct the large amounts of pressure put on a bicycle frame. A reinforcing composite material can be added to other materials, though, for added support and impact absorption. This has had solid success in skateboards, motorcycles and some mountain bikes.

Choosing the right compound for a bike frame can often take trial and error. Weight, density and stiffness all play important roles in the way the bike operates and responds to the rider. Titanium is the most dependable choice, but the other two should not be exempt from brainstorming for improvements in ergonomics and handling. There is an exciting future in store for riders and entrepreneurs in the bicycle world. Breakthroughs in materials and manufacturing will likely continue to be faster, cheaper and more durable than ever before. As of right now, I'd recommend going to your local skate park to ask around and maybe test ride a few frames.




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Monday, December 28, 2009

Mountain Bikes


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GMC Denali Women’s Road Bike (20″/50cm Frame) The GMC Denali 700C Women’s 21-Speed Road Bike is built around a lightweight aluminum 19.5-inch road bike frame. This model has the traditional dropped top tube women’s configuration. 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.

Specifications:


  • 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 700X28C
  • 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 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

Customer Review: Mediocre
This was my first road bike but I rode into the ground. I’ve easily put 600-700 miles on it in three months and it’s ready to be retired. The pedals make an clicking sound and the gears don’t change well. In fact, my chain tends to fall off from time to time.


I would recommend this bike to someone who is using it to commute short distances because it does ride well around town. I’m 5′5 and it fits me well.


Competitive bikers, look elsewhere. For the average rider, it’s about middle of the road, but it’ll get the job done.
Customer Review: the big problem
The bike in general is good, everything works, easy assembly, my big problem are the tires, i get a flat tire AT LEAST ONCE OR TWICE A WEEK!!!!!!!, OMG!!!, i need the bike, but this is imposible, i dont know what to do!.




Tags: 700c Wheels, Amazon, Bicycle Buying Guide, Bike Frame, Brake Levers, Caliper Brake, Drop Bars, Flat Terrain, Front Derailleur, Gmc Denali, Lightweight Aluminum, Mountain Bikes, Paved Surfaces, Racing Bikes, Racing Rims, Rear Derailleur, Road Bikes, Shimano Derailleur, Speed Road, Steel Chain

Other than spending a small fortune on a hybrid car or electric car, commuting by bicycle is probably the best way to save gas and improve the environment. When selecting your next (or first) bicycle, it’s pretty important to understand the different bike types. Here’s a few tips about the most basic categories.


Road bikes, also known as racing bikes, are usually, if not always built for speed and riding on smooth surfaces like pavement. Because of this they are equipped with very narrow tires, drop handlebars (to put the rider in the most aerodynamic position), and multiple speeds (12-24 gear positions is common). Racing bikes follow the same basic layout, but with a very lightweight frame. Although road bikes and racers can be used for commuting, most casual riders opt for comfort rather than speed.


Mountain bikes are built less for speed and more for durability and control. These bikes have much larger tires, raised handlebars that put the rider in a more upright position, and are generally (but not always) heavier. Since mountain bikes are intended to be used on trails and steep inclines, the gear ratios are generally lower than that of road bikes. Some mountain bikes have up to 36 gears, advanced suspension systems to handle bumpy trails, and it is now common to find disc brakes on one or both wheels. These bikes are great for commuting, especially if some of that commute is over uneven and rough or rocky roads.


Hybrid bikes attempt to combine the best of road and mountain bikes, and are intended to handle most commuting situations. These bikes come equipped with narrower tires than mountain bikes, suspension systems for the occasional bumpy road, comfort grip handlebars and comfy seats, and often come with pre-fitted fenders and luggage racks for bicycle saddle bags. Many hybrids are geared much like road bikes, while others limit the number of gears to a minimum (5-7 speeds) or have the gears “sealed” in the rear hub (3-5 speeds). Hybrids are generally the best selection for most commuting situations, and are a great choice for casual riders.


Many other specialized types exist, from single speed cruisers to very specialized off-road “rock riders” and BMX racers. However, most cyclists will do alright to start from the list above. Use this guide as a starting point, try out a few models of each type to see what’s a good choice for you, and then start riding. You won’t regret it.



PUMP's Forest Park mountain bike tour by BikePortland.org

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