HM Bike DHM, Руководство пользователя

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Wheels, tires, air pressure, valves
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source of extra information. On www.magura.de for instance, you will find detailed information on
using and setting up suspension forks and disc brakes.
Frames with rear suspension
If you want to experience a particularly sporty or comfortable ride off-road
with your DHM bicycle, then perhaps you opted for a full suspension
model. This means that the rear part of the main frame is not rigid but
flexible and damped and cushioned by a shock absorber. This type of mo -
del doesn’t just offer increased riding safety and comfort, it also requires
special care when using it. This instruction manual is only able to discuss
general key topics. If you would like more detailed information and advice
then please read the enclosed manufacturer instructions for the shock
absorber and speak to your specialist retailer. The website of your respective
suspension manufacturer could also be a useful source of information. On www.sram.com/rockshox
for instance, you can find detailed information on how to use and set up the rear suspension.
The specialist retailer should have set up the suspension for you before handing over your new
DHM bicycle. Don’t be surprised if the bicycle and seating position are different and if they feel
different to what you are used to.
The suspension struts have to be set up to be soft but not so soft that they overtravel when you
drive over an obstacle. Therefore the bicycle should only lower a little when you sit on it.
Please ensure that you read the enclosed instructions provided by the manufacturers on suspension
and shock absorbers.
Care and maintenance
You can clean a full suspension MTB as you would a conventional bicycle, using warm water with a
little washing up liquid or weak cleaning agent that can be purchased from your specialist retailer.
You should avoid washing your bicycle with a high pressure cleaner, as this forces cleaning fluid at
high pressure into insulated areas and damages them.
The shaft and seals of the shock absorber themselves should be carefully wiped with a soft cloth as
part of your regular bicycle care. If you spray a little lubricant onto the surfaces of the suspension
and the gasket, they will work better and last longer.
There are special lubricants made for this purpose, such as Brunox.
You should regularly check the fixtures at the rear of the bicycle for any looseness. To do this, pick
up the bicycle and try to waggle the rear tire laterally. Also, by picking up and then quickly putting the
rear part of the bicycle back down, you can check if the fixing sockets of the suspension are tight. If
you feel any looseness anywhere or can hear rattling, you should have your bicycle checked by a
specialist retailer at once.
It is vital for your safety that the suspension elements are working properly and are tightly fitted!
Clean and check your full suspension bicycle on a regular basis!
Wheels, tires, air pressure, valves
The wheels form the only points of contact between your bicycle and the ground.
They consist of rims, hubs, spokes, rim tape, inner tubes and tires. They are put
under great pressure by the weight of the rider and the road conditions. Checks
and maintenance are therefore essential. In addition, the spokes should be
retrued by a specialist after being ridden in (after approx. 100 km).
Rims are subject to friction from rim brakes.
They are therefore subject to wear; the strength of the rims, which can be checked by specialists
using a special measuring device, may not fall below a critical level. You should have this checked
after every second set of brake pads. The wear of aluminum rims (from 24”) can be detected by
analyzing wear indicators.
Even if these are only showing signs of wear in one place, the rims have to be replaced! The hubs
should be adjusted by a specialist if you can detect any play. To detect play, you have to grip the
front wheel in the fork or the rear wheel in the rear stays on the rim or tire and try moving from side
to side at a right-angle to the wheel. This will easily allow you to feel any looseness at the hub.
Seek advice from a specialist retailer when selecting your type of tire, because this is closely linked
to the type of riding you are expecting to do with the bicycle. After all, the tires are responsible
for providing grip and traction in corners, under braking and acceleration on the different types of
terrain. The rolling resistance and off-road capabilities are majorly dictated by the tire profile. It goes
without saying that the inner tube also has to match the dimensions of the tire. These dimensions
are given in millimeters (width and diameter e.g. 622-23) or in inches, e.g. 28 x 1.60. The required
air pressure is also printed on the tires, and is displayed as a conversion from PSI to bar.
You can find more information about how to convert PSI into bar in the table in the “Technical
information” chapter.
The maximum air pressure may not be exceeded as this can cause the tyres to explode and result
in injury!
Tire pressure that is too low is also dangerous, as the tire does then not have enough grip on the
rim.
As a general rule of thumb, mountain bike tyres have a safe air pressure of 2.5-3 bar, trekking, city
and touring bikes approx. 3.5 bar and racing bikes around 6.7 bar.
If you have to change a tire, be careful to replace it with another tire with the appropriate type and
dimensions!
There are now 3 different types of valves on the market. The valve
is protected again dirt by a protective cap. These valves allow you to
pump air into the inner tube and are protected from dirt by a small cap.
Dunlop quick release valves and Schrader valves can be filled with air
after the cap has been removed and a fitting pump allied. In the case
of Sclaverand / racing valves, a small nut first has to be screwed on
and pressed for a short time, allowing some air to escape. You can
avoid fitting your tires the wrong way round by always ensuring that
the quick release lever is on the other side to the chain gear system. If
your wheels are protected by cap nuts, it is important to adhere to the
correct order of nut, fail-safe mechanism and locknut.
Rear shock absorber
Wheels
Information on tyres
Bicycle valve