August 30th, 2010
Many riders new to BMX will often hear or read about the importance of chromoly in BMX bike construction, particularly with regard to the various types of BMX frame on the market. What is chromoly and how significant is it?
Chromoly is a steel alloy that makes use of two strength-inducing elements, chromium and molybdenum. Compared with normal high-tensile steel, chromoly has over 50% extra strength. The advantage of using chromoly in a bike’s construction is that the strength of high-tensile steel can be matched using lighter tubing; a factor that can help when performing high energy, strength-sapping freestyle tricks.
A BMX frame made from chromoly will usually tend to be more expensive than the equivalent high-tensile steel version, and this will also tend to be reflected in the price of any bike that contains a chromoly frame.
For the less experienced rider, however, a lightweight frame or bike may not necessarily be essential, particularly as the more complex, gravity-defying tricks can only be performed properly with a great deal of practice. Whilst easier manoeuvrability of a BMX bike may be a pleasant additional touch, the bike’s strength should be given more focus when choosing a complete model or when looking for a replacement frame.
Moreover, advancements in frame construction technology have led to other modifications like smaller drop outs (the parts of the frame that connect to the back wheel hub) also contributing to a reduction in overall bike weight.
At bmx.co.uk we can advise on the most appropriate, and affordable, quality BMX bikes and parts for any rider.
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August 6th, 2010
BMX frames have developed over the years into precision components that provide a perfect balance between helping to maintain stability and facilitating manoeuvrability.
Although all BMX frames have strong similarities to each other, there are some small but significant variations between frames used by riders from different BMX disciplines.
Racing BMX bikes, for example, may have a steep head tube and a short wheelbase to help facilitate quicker and easier turns. Such features on a street or vert bike, however, would risk undermining the rider’s control of the bike during the performance of complex tricks.
A flatland BMX frame on the other hand will often have a short top tube and a short wheelbase in order to help the rider lift and raise what has to be a relatively bulky and robust structure.
A second reason to look for BMX frame variation is the accommodation of differing rider heights and builds. A longer top tube and longer wheelbase, for example, would be more comfortable for a taller rider.
Complete BMX bikes that are designed for taller riders include the Free Agent model, Devil. Not only does this bike have a 24 inch long top tube (the average length being twenty inches), it also provides additional support for the taller, heavier rider by incorporating 24 inch wheels rather than the standard 20 inch versions.
Whether choosing a complete BMX bike or simply looking for a replacement BMX frame, we at bmx.co.uk can give expert help and advice, as well as offering a wide range of great value designs.
Tags: BMX, BMX Bikes, bmx frames, racing bmx
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July 8th, 2010
There are many considerations when looking at the suitability of a BMX frame.
The top tube (the uppermost tube between the handlebars and the saddle area) is the most important consideration, as a longer tube will be more appropriate for taller riders, a shorter tube for smaller riders. In addition, for more experienced riders, a longer top tube will provide more room for performing mid-air bar spins.
The length of the chain stay (the tube linking the bottom bracket, or pedal area, to the back wheel hub area) should also be taken into consideration. Taller riders, for example, will benefit from the stabilising counterbalance afforded by a longer chain stay. Experienced stunt riders, however, may find that a shorter chain stay makes the bike more responsive when performing lifts.
A steeper angle for the head tube (the tube to which the handlebar stem and the fork are connected) can also help the bike respond more easily, when turning and spinning during advanced stunt demonstrations. Dirt riders, however, may benefit from the greater stability of a more modest head tube angle.
A similar balance between manoeuvrability and stability should be considered when choosing between a less stable high bottom bracket (the bottom part of the frame to which the pedals are attached) or a more stable lower-positioned bracket.
A final dilemma can sometimes arise with a steep seat tube angle that might interfere with performing experienced mid-air vert tricks, but which can also be easier to grip when performing jumps.
At bmx.co.uk we understand the science that helps you find the best BMX frame.
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June 12th, 2010
With BMX bikes, very subtle differences in frame design have a significant impact on the way they handle and perform.
For example, variations in length of the frame’s top tube (the uppermost horizontal tube on a frame) will have implications for both riding comfort, and the ability to undertake certain manoeuvres.
A longer top tube will be more ergonomically suited to a taller rider, a shorter top tube for riders who are shorter. A longer top tube will also provide the experienced rider with space, in which to demonstrate more complex mid-air vert tricks, such as bar spins. A shorter top tube, on the other hand, will render a bike easier to perform flatland tricks, such as wheelies and a 180 degree turn on one wheel.
The surprising fact, however, is that top tube variations do not have to be drastic to impact on riding comfort or performance; lengths vary only between 19.5 and 22 inches.
Similar subtle distinctions apply to the angle of the head tube (the tube that connects the front wheel axle to the bike’s headset). A steeper angle will provide much more responsive steering. A less steep angle will allow for more control over manoeuvres. Yet, the actual angle variation between the two is often only between 74 and 75 degrees.
With such subtle variations being so crucial, yet hard to observe by the amateur rider, it is vital that sound advice is obtained before purchasing a BMX bike.
At bmx.co.uk, we have expert advice on all BMX bikes, together with some great deals.
Tags: BMX Bikes, BMX Frame, bmx shop, branded BMX parts
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May 19th, 2010
In the BMX world there can often be much fuss made about the introduction of a brand new signature BMX frame. Why should this be?
Signature frames are named after one of the professional riders working for a BMX company who has had a hand in the frame’s design.
A signature will first attract comment if it competes favourably against other brands in the area of weight. Much is made in BMX circles about the increased ease and flexibility afforded to a rider through the use of a lightweight frame, although it should be stressed that strength and durability are equally important qualities that a rider should be looking out for. A frame such as the D Watt$ HT designed by Davey Watson for Federal, for example, weighs under four and a half pounds but has also undergone a special heat treatment to provide added strength.
Many signature frames will also include subtle design variations with a view to helping the experienced rider capitalize more on his or her abilities. These variations can, for example, affect the angles or lengths of the different tubes that make up the frame.
Finally, a new signature frame always makes a statement and, when fitted, can make any BMX bike appear more up-to-date.
The added benefit of course for those riders who secure a new signature frame will be the guarantee of quality from one of the top BMX brands. At BMX.co.uk we stock the best branded BMX frames on the market, and at prices that will make any BMX rider happy.
Tags: BMX Bikes, BMX company, bmx frames, BMX Parts
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