Mountain Bike Anatomy
Mountain bike anatomy is more like the skeletal structure of the bike cycle, although the word anatomy does describe the complexity of some components of the bike cycle.
Like any tool that has a purpose of use it is important to understand what the working parts are. By understanding the various components of the unit it brings more confidence to go riding in the back country. One of the basic repair tasks that a bike rider needs to understand and have the competence to do is to learn how to deal with a flat tire. The tire may go flat for many reasons, it could be that the tire tube inner valve has been removed, or that the air was let out of the tire through the valve. The other possibility is that the bike has been in storage for so long that the air has leaked out of the tires, this may happen in 3- 6 months. The other scenario is that during a ride a sharp object has penetrated the outer tire and puncher-ed the inner tube. Therefore the inner tube repair is needed. This can be done with the wheel in place, you can fix the puncher without taking off the wheel.
Step1. Undo the tire of the rim, using two tire levers. Then pull out the inner tube along the wheel.
Step 2. Use an air pump to get some air into the tire, once there is sufficient air in the tire, and that the hole in the tire is sufficiently big, you will hear the air leaking out.
If the hole is not sufficient in size (slow leak) then you will need a basin of water, and place the inner tube into the basin of water, or rub some water onto the inner tube. Once the water on the surface of the inner tube covers the hole, there will be a visible bubble, and a hissing sound. That will indicate where the hole is.
Once you have discovered the hole, look at the tire, at the precise location where the inner tube was when in place, go by the valve position, there is only one way that the inner tube can go on, while the wheel is in place. Check for the sharp object, it may be a nail, a tack, or a shard of glass. By locating the cause of the puncture, and checking for an object, and removing it, you will save time. If you don’t remove the sharp object, you will be redoing this tire repair all over again once you get on the bike and start riding, the cause of the puncture may be still stuck in the tire. Duh! Not always the case, some times the object falls out by itself.
Step 3. Mark the hole location by placing pointers on the outside, 2 cm distance from the dead center, by rubbing it with sandpaper, marker or a scraper. That way when you put the glue on the inner tube, it won’t cover up the spot where the hole is, and get lost.
Step 4. Select a patch sufficient size to cover the damage, clean the area with a cloth, sandpaper the are rough, that way the glue will hold better. Then place the glue on the area, a tad over the size of the tube repair patch. Allow the glue to dry a minute. You will not need to place glue on the repair patch, it is protected with a plastic or foil covering. After one minute place the repair patch over the damage area. Press down firmly, rub from the center of the patch to the outside, to remove any air bubbled from the repair patch. Tap down with a block of wood, over another piece of wood. This will ensure that there are no air bubbles left under the repair patch. Allow to rest some several minutes.
While waiting you can get a piece of cloth and rub the inside of the tire, to check for sharp objects, and also clear the inside of the tire from sand and dust. You can easily feel it when rubbing the inside of the tire, if there are shards of glass, a stick, or a thorn sticking through the outer tire. Also check the rim, there should be a rim tape around the rim, it’s purpose is to cover the spoke heads, so that they won’t cause the inner tube to rub and wear though, causing a puncture that way. Make sure that the rim tape is intact, if not then replace it with a new one. There should be no sand or dust inside the tire or the rim, any sand or dust will eventually cause the inner tube to wear through and the air to escape.
Step5. Start putting the inner tube back inside the tire, work it from the location of the valve, and make sure that the inner tube is not twisted or crooked when it goes into the tire.
Mountain Bike Anatomy explained
A mountain bike is the one thing you need before you
go mountain biking. A mountain bike contains many
parts, which will be covered below:
1. Bottom bracket – This attaches the crankset to
the body of a bike.
2. Brake cable – This is the cable that connects the
brake lever to the brake mechanism.
3. Brake lever – The lever on the handlebar to
activate the brakes. The left side is the front brake
and the right side is the rear brake.
4. Chain – The circular set of links that transfer
power from the chain ring to the cogs.
5. Chain ring – The toothed rings that attach to
the crank to hold the chain.
6. Crank – The lever that extends from the bottom
bracket to the pedal, transferring the power to the
7. Derailleur – The mechanism for moving the chain
from one cog to another.
8. Down tube – The section of frame that extends
downward from the stem to the bottom bracket.
9. Front shock – The shock absorber on the front
10. Handlebar – The horizontal bar attached to the
stem with handgrips on the end.
11. Headset – The mechanism in front of the frame
that connects the front fork to the stem and
12. Hub – The center part of the wheel that the
spokes are attached to.
13. Idler pulley – The bottom pulley of the rear
derailleur that provides spring tension to keep
the chain tight.
14. Nipple – A threaded receptacle that holds
the end of the spoke to the rim.
15. Pedal – The platform to pedal on; attaches to
16. Rear shock – The shock absorber for the rear
tire on dual suspension type bikes.
17. Rim – The metal ring that holds the spokes
on the inside and the tire to the outside.
18. Saddle – The seat.
19. Seat post – Offers support for the seat.
20. Skewer – The metal rod that goes through the
hub, attaching the wheel to the dropouts of the
21. Spindle – The free rotating axle that the
crank arms attach to; also a part of the bottom
22. Spokes – The thick wires that join the hub to
23. Stem – A piece that attaches the handlebar
to the steering tube.
24. Wheel hub – The center of the wheel that the
spokes are attached to.