1. Single link system
Main structure: Single link system is currently the most common type of front and rear shock absorbers. The lever of this system only uses one bearing to connect to the frame, and the position of its upper bearing determines the riding performance of the car. Like off-road vehicles, the bearings are mostly at the height of the middle chainring; the bearing position of the freeride model is relatively higher, and slightly forward.
Advantages: light weight, cheap and easy to maintain.
Disadvantages: easy to shake and easy to be interfered by the transmission system.
Technology: Most of the single-link system adopts a compromise approach, so it is recommended to use the rear shock absorber of the stepping platform.
2. Multi-link system
Main structure: The rear suspension system of this structure is most easily confused with the four-link system, because the two are the same in terms of the number of links; but from the functional point of view, the function of this rear body is the same as that of a single link. The system is very similar. In this structure, there is no link connecting the main bearing of the pedal bearing and the rear wheel shaft. Simply put: it is a single-link system with multi-link support.
Advantages: good rigidity, no uneven load of unilateral shock absorbers.
Disadvantages: Because of the large number of bearings, it is easy to shake.
Technology: If a rear shock absorber with a stepping platform is used, its performance can be greatly improved.
3. Four-bar linkage system
Main structure: It is a design method in which the bearing point on the chain bracket is located before the rear suspension. This is the difference between the four-link system and the multi-link system. In this way, the rear wheel moves on a turn formed by four bearing points. For example, on Specialized models, the rear wheels are vertically upward to absorb shock. In this case, the shock absorber must also operate independently of the chain.
Advantages: The action is extremely flexible, and there is no interference from the transmission system.
Disadvantages: There is a bearing, which is slightly too heavy.
Technology: Since there is no interference from the transmission system, there is no need for a rear shock support system with a stepping platform, or only a lighter one.
4. Four-bar linkage system without sinking
Main structure: It is a kind of four-bar linkage system, such as the one used by GIANT in its NRS frame. In this structure, the rear wheel absorbs shock obliquely to the rear. In addition, its shock absorbers also have no reverse easing stroke. In the event of a collision, the shock absorber will immediately pull away from the chain guide after it absorbs the shock, so it will also cause annoying subsequent shaking.
Advantages: No shaking, stable even when riding in a standing position.
Disadvantages: Need to do precise adjustment, comfort will be affected.
Technology: There is no need for a rear shock absorber to step on the platform, because this-shock absorber system has already taken anti-shake measures.
5. Floating link system
Main structure: Although this floating link system developed by the Fusion factory looks extremely complicated, it is basically a four-bar system without compromise. Its special feature is that the shock absorber is suspended between the revolving rod and the connecting rod. This design allows it to have fine acuity and a lower center of gravity.
Advantages: high acuity, good transmission system, low center of gravity.
Disadvantages: complex frame structure design is required.
Technology: With ordinary springs, this floating connection system can perform extremely well, and there is no shaking when stepping on it.
6. Virtual Link Pivot Point (VPP) system
Main structure: This virtual connecting rod turning point system is driven by two revolving rods to drive the entire rear wheel, using its cushion stroke to make an S-shaped turning motion. In this way, the shock absorber will automatically be positioned in a position that does not interfere with the transmission system when stepping on it.
Advantages: no obvious shaking when stepping on.
Disadvantages: Need to be carefully adjusted, flexibility is not high, there is a slight kickback phenomenon.
Technology: A rear shock absorber with a pedaling platform is not very needed, but it can only improve its standing riding function.
7. Single link system
Main structure: In this single connection suspension system, the pedal bearing is connected to the frame and the rear wheel in a mobile manner, thus forming a hybrid structure of multi-link and transmission link. The stronger the rider's pedaling force, the less stress the suspension system will bear.
Advantages: There is no shaking when riding in a standing position, and the body is stable when pedaling.
Disadvantages: If the rider leaves the seat cushion, the shock absorbers will not be sensitive enough.
Technology: There is no need for a rear shock absorber with a platform, because the system itself has almost no shaking.