What a mountain bike frame suits me

19. Since there is less off-roading, the flexibility of a small shelf is not important, and the large shelf beam is long, which is more comfortable to ride.

When buying a bicycle for sports, the first thing to pay attention to is whether the frame size is suitable for the rider's figure. The measurement of frame size is generally based on the length of the frame riser, and the longer the frame body length of the riser; You can also sit on the saddle and place your feet on the pedals, and the lower legs can hang down and swing straight, so that the feet can have room to stretch when pedaling. The frame size of a general road bike is mostly one size per two centimeters for production frame brands, while one size per centimeter for high-end handmade frame brands.

With the center of the center axis of the (large chainring) and the riser fitting of the upper pipe, it can gradually increase from the smallest 47 cm to 62 cm, a total of 8 or 16 sizes. We can use it:

Spans the length of the frame riser.

The above formula to choose the right road frame size for your height.

In the case of mountaineering vehicles, it is centered on the center of the (large chainring) center of the riser joint, every 2 inches, as the size interval of the frame size, which can gradually increase from 14 inches to 22 inches, a total of 5 sizes. Due to the large size spacing of mountaineering buggies, it is impossible to measure the frame size suitable for the rider with an accurate formula, and can only choose a roughly suitable frame for riding based on height. Taiwan is usually based on inches, suitable for riders based on height, about 14 inches is 155 cm or less, 16 inches is 155-170 cm, 18 inches is 170 or more, as for 180 cm or more friends should try to find a bicycle above 20 inches.

19 of 180 I use 20 to be suitable.

For children, choose 20x10 inches (wheel diameter is 20, frame is 10 inches).

About 1 meter, the suitable children's wheel diameter is 12 inches.

95 125cm suitable for children's wheel diameter is 16 inches.

120 145cm suitable for strollers with a size of 20x10 inches.

140 155cm for teen bike size 24x12 inches.

Bicycle: The total length of the bicycle does not exceed 185 cm, the width does not exceed 50 cm, and the weight is not less than kg. The saddle length should be between 24-30 cm, the distance between the bottom bracket and the ground should be between 24-30 cm, and the diameter of the front and rear wheels of the bicycle must be the same. The diameter of the wheels is up to 70 cm and the minimum is 55 cm.

The bicycle used should be a dead flywheel and should not be fitted with a gear shift and brakes.

Domestic such as good boy, Giant, but barely riding, the world's top ten brands of strollers can be viewed in the official announcement of the bicycle association, such as, Marmot marmot, BMC bicycle, Orbea Obeia, BH Bichi, etc., but ** is much more expensive than the domestic one, but the safety factor is high, and the quality is guaranteed. FYI.

If you choose a domestic children's bicycle brand, it is indeed as much as a cow's hair, the quality is uneven, mixed, the safety factor of children's bicycles must be the first, the second can really play a role in strengthening the body, at present, domestic children's bicycle brands are more than cattle, but many domestic children's bicycle children's bicycle brands have been exposed to the quality is completely unqualified, frame parts paint, formaldehyde, plasticizers, heavy metals, benzene and other toxic chemical products seriously exceed the standard, because for children, The safety factor of children's bicycles must be the first, in addition, the structural design of children's bicycles is also very important, the global health organization believes that letting children do bicycle sports can really promote children's brain and musculoskeletal development, so that children can obtain a relatively balanced development of intelligence and physical strength. About the world's top ten expensive children's variable speed bicycle brands announced by the bicycle industry association: Marmot Marmot, Tyrell Taylor, Spoked King FRW, Orbea Obea, Ghost Cool Chi, BH Byz, Focus Focus, Scott Scott, KTM Bicycle, Bianchi Bianchi, Fuji, but these children's bicycles ** are not generally high, generally more than 1,000 yuan, Depending on the budget and the personal preferences of parents and children, if the rice is enough, you can buy imported children's bicycles such as marmot, tyrell, Taylor, spoked wheel, frw, Obea, etc., first understand the relevant information.

There are thousands of imported and domestic children's mountain bike brands in the Chinese market, dazzling, as many as cow hair, but many domestic children's bicycle brands are exposed to be completely unqualified in quality, frame parts paint formaldehyde, plasticizers, heavy metals, benzene and other toxic chemical products seriously exceed the standard, greatly endangering the physical and mental health of children, more well-known such as good children, giant Giant, but the imported quality is much better, and the safety factor is also high, You can refer to the top ten children's mountain bike brands announced by the Bicycle Industry Association: Marmot, Tyrell Taylor, Spoked King FRW, Orbea Obaya, which of these two is more suitable for children and students, the key is to look at the budget, so ** is basically below 1000, it is recommended to buy carefully.

The choice of mountain bike frame material depends on the use scenario and needs. Here are some common frame materials and their special potato points:

1.Aluminum: Aluminum alloy is one of the most popular frame materials for mountain bikes.

Its advantages include low density, ease of molding, low cost, light weight, and high strength. At the same time, the corrosion resistance and shock absorption performance of the aluminum alloy frame are also relatively good. However, it is relatively poor in fatigue resistance and cannot be repaired if it breaks.

2.Steel: A steel frame is comparatively heavier, but it is more resilient than an aluminum alloy frame, providing better comfort and durability.

In addition, damage to the steel frame is relatively easy to repair and only requires a single weld. However, it is less corrosive and requires regular maintenance and painting.

3.Titanium: The titanium frame has high strength and rigidity, while being lightweight and corrosion-resistant.

It is technically difficult to manufacture, so it is relatively expensive. However, titanium frames are prone to bending in crashes, requiring complex stress calculations and handcrafting, resulting in higher costs.

To sum up, the choice of mountain bike frame material should take into account the use scenario, needs, and budget. If you need a lightweight, strong, and durable mountain bike, aluminum alloy is a great choice. If better comfort and durability are needed, a steel or titanium frame may be a better fit.

Advantages and disadvantages of mountain bike frames of different materials: 1. Ordinary carbon steel frame. Pros:

Sturdy and low-cost. Disadvantages: large weight, easy to rust.

2. Aluminum alloy frame. Advantages: light, good hardness, reasonable.

Disadvantages: low fatigue strength, poor elasticity. 3. Chromium-molybdenum steel frame.

Advantages: good hardness, good elasticity and high durability. Cons:

The weight is on the high side, ** on the high side. 4. Titanium alloy frame. Slim Silver Lift Point:

Light, good hardness, good elasticity and rust resistance. Cons: High.

5. Carbon fiber frame. Advantages: very light, elastic, rust resistant.

Disadvantages: poor impact resistance, high impact.

The 16-inch rack is suitable for 155 170, the 17-inch rack is suitable for 165 175, the 18-inch rack is suitable for 170 180, and the 19-inch rack is suitable for 175 185, but it is not absolute, and the length of the individual's arms and legs must be comprehensively referenced

Suitable for riding a 17-inch frame, suitable for people from 165-175. When the shunting seat sits on the car, the foot back state Li Zhao heel on the pedal, when the pedal is in the lowest position, the leg can be straightened, this is the standard height, novice can be lowered a few centimeters, and then slowly rise.