What is a bicycle frame? Notes when choosing a chassis

When you choose to buy a bicycle, the frame is the part that needs to be focused on because it determines the durability as well as the comfort of riding. Let’s learn about bicycle frame parts with Tnhelearning.edu.vn!

What is a rib frame?

The frame is the main part, like a skeleton, that determines the shape of the car. This is the place to connect parts such as thighs, discs, handlebars, handlebars, saddles, wheels … or to attach other accessories. This is a heavy-duty part, so it is reinforced very firmly, to ensure the safety of the operator.

Classification of frames

Based on the material, frames are usually divided into 4 types:

Steel frame:

A popular material since the 1980s, this is still a good choice when it comes to feeling compact and solid.

Advantages: Steel material is inexpensive, durable, easy to repair and easy to machine. If bent or cracked, it can still be bent or welded. The heavy load capacity and bearing capacity of steel are very good.

Cons: Having a fairly heavy weight makes it difficult to carry the car, the frame quickly rusts and degrades as well as can be easily corroded.

Aluminum frame:

A popular material and quite popular in the bicycle industry because they are not only light and strong, but also easy to weld.

Pros: Aluminum frame is lightweight, responsive, strong and tough. Therefore, mountain bikes are often designed with aluminum frames, to ensure the rigidity and certainty required.

Cons: Usually breaks down faster than carbon and titanium frames, bends easily during operation, so the weight of the car is often heavier than other frames.

Carbon frame:

It is an advanced material that has been widely applied to road bikes. Because not only is the interlocking structure super durable, but it is also extremely flexible, light and sturdy.

Advantage:

– Extremely light weight.

– Good shock absorption performance: Carbon fiber can effectively absorb vibration, making the car stable and damping good bouncing.

– Can make many different frame shapes.

Defect:

– The cost of the carbon frame is quite high (even higher than the titanium material). This is because the manufacturing process requires a lot of manual work, and the scrap rate is high, resulting in a large increase in costs.

– Complex stress calculation (vertical stiffness and transverse stiffness). Carbon fiber frame is composed of carbon fiber, which is characterized by strong tensile strength, but weak shear strength, which requires complex stress calculation during machining and carbon fiber sheet superposition according to calculations.

Titanium frame:

It is a light weight and good bearing material, which is the best material for the manufacture of bicycle frames.

Advantages: Titanium frame is light but very strong and durable, hard to corrode and hard to damage.

Cons: The cost of the titanium frame is high.

Notes when choosing a bicycle frame

To choose a suitable car frame to use is not an easy thing. The first thing you need to determine is your need to use a bicycle, whether it is mountain climbing, or going in the city, or running long distances, …

Determining the size of the chassis is extremely necessary, each person has different height and body parameters, so different frame sizes are needed. Here is one of the methods to help you choose the right frame size.

Step 1: Measure inseam

– Stand close to the wall, bare feet.

– Place a book between your legs while standing in a normal position, pressing the book upwards, against your pelvis. Mark with a pencil or crayon on the wall a point above the book.

– Measure the distance from the background to the wall marker in centimeters or inches, this distance is called your inseam (red distance in the picture).

Step 2: Refer to the related chart between body parameters and chassis size

Road bike frame size conversion table (Road Bike):

Inseam foot length (in/cm)	Seat Tube Stand (cm)	Crank Size (mm)	Rib Size Size
25.0/64	43	165	XXS
25.5/65	44	165	XXS
26.0/66	45	165	XXS
26.5/67	forty six	165	XXS
27.0/69	47	165	XS
27.5/70	47	165	XS
28.0/71	48	165	XS
28.5/72	49	165 – 170	XS
29.0/74	50	165 – 170	S
29.5/75	51	165 – 170	S
30.0/76	52	170	S
30.5/77	53	170	S
31.0/79	54	170	S
31.5/80	54	170 – 172.5	USA
32.0/81	55	170 – 172.5	USA
32.5/83	56	170 – 172.5	M/L
33.0/84	57	172.5	M/L
33.5/85	58	172.5	OFFER
34.0/86	59	172.5 – 175	OFFER
34.5/88	60	172.5 – 175	XL
35.0/89	60	175	XL
35.5/90	sixty one	175	XL
36.0/91	62	175	XL
36.5/93	63	175	XXL
37.0/94	sixty four	175	XXL
37.5/95	65	175	XXL
38.0/96	66	175	XXL

Size conversion table for mountain bike / off-road vehicle (Mountain Bike)

Inseam foot length (in/cm)	Seat Tube Stand (cm)	Crank Size (mm)	Rib Size Size
25.0/64	13	170	XXS
25.5/65	13	170	XXS
26.0/66	14	170	XXS
26.5/67	14	170	XXS
27.0/69	14	170	XS
27.5/70	15	170	S
28.0/71	15	170	S
28.5/72	15	170 – 175	S
29.0/74	16	170 – 175	S
29.5/75	16	170 – 175	S
30.0/76	16	175	S
30.5/77	17	175	USA
31.0/79	17	175	USA
31.5/80	17	175	USA
32.0/81	18	175	USA
32.5/83	18	175	USA
33.0/84	19	175	OFFER
33.5/85	19	175 – 180	OFFER
34.0/86	19	175 – 180	OFFER
34.5/88	20	180	OFFER
35.0/89	20	180	OFFER
35.5/90	20	180	OFFER
36.0/91	21	180	XL
36.5/93	21	180	XL
37.0/94	21	180	XL
37.5/95	22	180	XL
38.0/96	22	180	XL

Street bike frame size conversion table (Hybrid Bike)

Above is information about car frames and how to choose a suitable frame. If you have any questions or need further advice, please leave a comment below so that Tnhelearning.edu.vn can support you as soon as possible!