Gear case

As a chainguard or chaincase is called a component of two-wheelers and certain machines that safeguards the driver or user from contact with the chain and thereby related injuries and pollution, and on the other hand shields the drive chain from dirt and other environmental influences.

Bicycle

When the bicycle thrown up from the road dirt may adhere to the lubricant in the chain and, together with this kind of a grinding paste that penetrates into the joints of the chain and accelerates their wear. In addition, an exposed chain with clothing may come into contact and contaminate it. Depending on the type of bike are different designs of the chain guard for use:

Substring protection

Gear with chain guard plate

Recumbent Bike with chain guard tubes

Substring protection "chain runner"

Substring protection

The most common design of the chain guard is a part of chain guard, which surrounds the upper part of the chain and the sprocket, and thus the driver and his clothes effectively protects against contact with the chain. He is not very suitable, since these in the places that are more exposed to the dirt from the road (eg behind the front wheel ), most runs open. To protect the chain itself For bikes with derailleur, the market offers models with cut-outs for the front derailleur. An alternative construction method for a partial chain guard for hub gear wheels is a tracking with the chain of slotted corrugated hose, also called Chain Runner. He encloses the chain and protects it and the trouser leg as from contamination. The disadvantage is that once eingdrunger dirt and moisture can not escape. Also, the risk of Einklemmenes of foreign bodies ( laces, leg ) is not banned between chain and sprocket.

Full Chainguard

Especially on trips or Holland wheels you will find the full chain guard or chain case. It surrounds the chain completely, including chainring and sprocket. As a circuit is only a hub gear into consideration, since the full chain guard would impede the necessary movements of derailleur and derailleur derailleur gears.

The advantage of the full chain guard is its low maintenance and long service life of the chain. The disadvantage is the effect of the high workload during disassembly of the rear wheel.

Chain tubes

Particularly widespread in recumbents are chain tubes made ​​of polyethylene or PTFE, which are respectively fixed to the upper and lower part of the chain and surrounded the frame to reduce slippage along the chain line. Your task is primarily in the protection of the rider's clothing from dirt. Since the chain slides in the pipes on the wall, minor frictional losses in the drive.

By using chain thermowells also " exotic" chain guides are possible, as they are often required to recumbents.

Become chain tubes combined with closed panels for the gears and deflections, a full chain guard can be realized. This is to some conventional wheels with hub gears application.

As standard, the light motorcycles and scooters of the company Simson were provided with a closed system of pipes and chain guard gear covers to extend the life of both the chain and the gears.

Peg ( bash guard )

There are chainguard wheels for chain rings to a maximum of 48 plastic teeth that are screwed onto the crankset and can be installed without disassembling the pedal. Weight about 90-120 grams.

Here are a vital conservation of the pants the cyclist is only guaranteed.