Removing And Installing Wheels With Gear Shifting Mechanisms; Schrader And Presta Valves; Tubeless Wheels - Orbea ALMA Instruction And Maintenance Manual

- Insert the clamp nut.
- Gradually turn the nuts on either side of the axle in opposite directions. The following torques
should be applied:
Front wheel: 12-15 Nm
Rear wheel: 12-15 Nm
Check that the nuts are properly adjusted as specified in the section below. If the nuts are not
correctly positioned, repeat the adjustment procedure or take your bike to your authorized
dealer.
Checking the clamp nuts are properly adjusted
Lift your bike and strike the upper part of the wheel. The wheel should not drop out, loosen or
move from side to side.
Adjusting tire pressure
If you cannot maintain proper tire pressure, it is most likely punctured or has a leak. Repairing
a puncture is explained in the tire inspection section. If you do not have the proper tools to com-
plete the repair, take your bicycle to your authorized dealer.

REMOVING AND INSTALLING WHEELS WITH GEAR SHIFTING MECHANISMS

Some parts of this chapter refer to parts that have already been explained, such as wheels and
braking systems.
Note: to remove the rear wheel with coaster braking systems, follow the instructions specified in
the brake section.
Removing the wheel
- Position the chain on the outermost cog.
- Open the brakes as indicated in the braking section
- Open the quick-release of the wheel or loosen the hub nut.
- Slide the wheel out of the fork ends.
Installing a wheel
- For the rear wheel, rotate the chain to position it on the outermost cog.
- Insert the wheel in the frame or fork, making sure that the hub is well inserted in the fork ends.
- Readjust the quick-release or tighten the hub nut as explained in the wheels section.
- Check the brakes and make sure they are well-adjusted.
- Spin the wheel and check that it is trued and spins freely without rubbing against anything.
Lubrication
- Grease the hubs once a year. This process requires specific tools and special know-how. It
should only be performed by an authorized dealer.
- Lubricate the quick-release lever with a synthetic lubricant ever year.

SCHRADER AND PRESTA VALVES

There are two types of valves: Schrader and Presta. Follow the criteria below when inflating your
tires.
Schrader valve: remove the valve cap, attach a pump with the proper head fitting for this type
of valve and inflate the wheel. Once inflated, replace the cap so that the valve does not become
dirty.
Presta valve: Remove the cap, if any. Unscrew the valve stem lock nut and push down on the
valve stem to free it up. A small amount of air will be released. Inflate the wheel using a pump
with the proper head fitting. After inflating, tighten the valve stem lock nut.

TUBELESS WHEELS

Some bicycles are equipped with a tubeless tire system. This is made up of the tire, a rim and a
specific valve for use without an inner tube.
A normal tire can fit onto the rim without using an inner tube without a problem. However, you
will have to install a tube since the tire is not sufficiently sealed to maintain the pressure. This
section explains the requirements of this system and includes instructions for assembly.
WARNING A normal tire is not able to maintain air pressure without an inner tube. If an inner
tube is not used, you could lose control and fall. Always use an inner tube with standard tires.
Repairing punctures in tubeless tires.
A well-installed tubeless tire can lose up to 0.25atm per day. If the loss is greater than that,
look for a leak. Dirt, sand, mud or possible grooves could weaken the seal between the rim and
the tire and cause leaks. Check that the valve is firmly in position. Check for punctures and the
sealing surface.
- Tire with rim
- Valve with rim
If the tire has a puncture hole smaller than 3mm, it can be repaired from inside the tire with
an appropriate patch. If the opening of the tire is greater than 3mm, the entire tire must be
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