Why does bike frame size matter




















Tall riders with heavier loads may even require a marathon tube that reinforces the bike with extra metal connecting the head tube to the seat stays. That said, marathon frame designs are typically not necessary these days as metal tubing is available in larger diameters than ever before.

If you have a front and rear touring load The typical touring load distributes weight across the whole bike. The heavier the load, the more stiffness the frame requires to handle the forces travelling through it. For example, I carry approximately 10kg up front and 15kg on the rear, and with this kind of load, the extra stiffness of an oversized steel Co-Motion touring frame is very noticeable when compared to a steel Surly Long Haul Trucker.

If you use a belt drivetrain Belt drive bicycle frames require a particularly stiff rear triangle so that a belt does not jump off the rear cog. Gates and Rohloff actually have a minimum stiffness standard for this if you plan to use their products. Other than keeping the belt on, stiffer rear triangles actually allow you to run lower belt tensions — which result in a reduced drivetrain resistance from your belt drivetrain.

You can read more about belt drive efficiency HERE. Most bike frames require upwards of N of force to flex one vertical millimetre. This translates to about a millimetre of flex when you apply your body weight to a frame. In comparison, a carbon seatpost like the Ergon CF3 Pro requires just 69N of force to travel a millimetre, which is a fraction of the force required. By applying as little as 10N to a wide tyre, it will easily deform a millimetre or more. Read more about why seatposts are overlooked yet critical for comfort HERE.

Frame stiffness optimises the stability of a loaded touring bike. Standover height can be a bit tricky to calculate, depending on the shape of the frame. Stand over the frame in the center, with your feet flat on the floor.

If you wear cycling shoes when riding, make sure you have them on. Effective top tube length ETT, refers to the horizontal distance between the head tube and the seat tube.

This measurement does not require any certain shape of frame, or even a straight top tube, so it can be measured on any bike. Buying a bike with the correct ETT for your body allows you to fine tune other parts of the bike later for a more perfect fit. If you have longer arms, you may need a bike with an added inch or two on the ETT. This is where you can really dial in your bike to make sure you are in the best position for steering and pedaling.

There are very few things you can actually adjust on a bike that are significant, but the two that you can are the saddle seat height, and the stem length. Once you have the right sized frame using the criteria above, you are ready to fine-tune the fit with these two components.

Getting your bike saddle to the perfect height ensures that you get the most out of your pedaling, while also avoiding lower body issues over time. A proper height also puts you in the best stane to maneuver the bike with your body, and your arms. If your leg is too bent, it means the saddle is too low. Adjust the saddle post by raising it a few notches, and then try it out again.

If your leg is too straight, the saddle is too high, and needs to be lowered a bit until you get the desired leg extension percentage. Always be sure to not o ver tighten the saddle post, as you may break the lever, or even cause the post to crease and fold. The best way to tell if you have the saddle in the right position to to check the positioning of your foot as you pedal, in relation to where your knee rests above it.

If your knee is too far ahead of your forefoot, you need to slide the saddle back a little bit, and vice versa if your knee is behind your forefoot.

You can make slight adjustments by loosening the saddle binder bolt, and then sliding the saddle forward or backward as needed. This adjustment and pedal position is the same for all bikes, although you may be able to tweak it a bit over time as your riding habits and strengths change. The stem is what connects the handlebar to the top of the fork. If your ETT is too short, you can purchase a stem that is a little longer, which will allow you to lean forward more comfortable as you steer, and allow your arms to relax more.

It should be noted that your steering will not be as responsive, but this will not be an issue, most likely. Fitting a bike for a woman may be different, but not always. Make sure to adjust the seatpost height as needed too.

Now you know what to look for when shopping for a new bike that is fitted to your size. When looking online, pay special attention to the measurements, and check to make sure they are in line with your ideal size.

You can also determine your frame size by looking at your height. The bike frame size does matter as it determines your cycling posture and overall comfort.

A wrong frame means an uncomfortable posture, which translates to body pains and poor bike handling. You should get a bike frame size that matches your inseam and height, and here is a table to use:. Such a bike will force you to sit stiffly and will not offer you enough room to pedal and control the bike.

Bike Finest is your ultimate resource for learning everything about bikes and cycling or any information when trying to find the right bike for you. A hybrid bike is one versatile two-wheel beast. Whether you want to commute to work or school, run errands, or explore light trails, a hybrid bike comes in handy, and one of the leading hybrid makers According to Trek, its electric bikes allow you to go fast, carry more and conquer hills.

Since that's everything we all want from our e-bikes, I had to find out: are Trek electric bikes Skip to content One thing you are likely to notice first when shopping for a bike is its size. The geometry offers you more room to flex, which is suitable for casual riding. Larger Wheelbase A bigger frame size also means have a longer wheelbase. Though you can handle the bike better, you cannot move it freely. Smaller Wheelbase A shorter frame also translates to a shorter wheelbase.

Backache An incorrect bike frame, especially a smaller one, puts your back under unnecessary stress as you stay rigid. Knee Pain A small bike frame, in particular, is likely to hurt your knees. Doing so could rupture your soft knee tissues, resulting in pain. Body Fatigue An incorrect frame size also interferes with your pedaling efficiency. Risk of Crashing The other risk and irrefutably the gravest of them all is that an incorrect bike frame size could make you crash.

Frankly, you can only have that if you get your size.



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