Mountain bike problem, mountain bike problem

If you don't consider your actual use and capital reserves, of course, the higher the better. Generally speaking, the higher the number of shifts, the smoother the shifting, which can bring a comfortable, smooth feeling to the ride, and of course, the higher the speed. From nearly 1,000 yuan of DEORE to nearly 10,000 yuan of XTR, they are all 27-speed masterpieces.

Of course, if you're planning to get around the city and get out into the smooth backcountry once in a while, then an 18-speed transmission is more than enough for you, because the low price point of the 18-speed will give you plenty of enjoyment for city cycling.

Therefore, there is no fixed judgment of whether a transmission is good or bad, and its quality is determined by your own actual usage. Therefore, the transmission that suits you is the best.

To be exact, it is *9, which should be used for both left and right shifts. For example, the most ** to the largest fly, the smallest disc to the smallest fly is taboo, which will damage the chain and derailleur.

The 18-speed is generally found on ordinary civilian vehicles. In mountain biking, there are 7 introductory stages, 8 recreational stages, and 9 professional stages. It also corresponds to the speed separately, but it is inaccurate to say this, and the explanation is as above.

If it's just on flat land, in fact, there is not much difference, and the ordinary 28 bars may not run much slower than these cars without a transmission. The difference is mainly uphill, with more sections giving the rider more options when the trail changes, resulting in a better ride.

More importantly, each segment corresponds to a transmission system, 9 stages are better than 8 stages are better than 7 stages, and the weight, accuracy, and solidity of the former are greater than those in the later stages. It should be for the level of competition. Of course**It's not the same, the 9-stage XTR kit** is about 1W, the 9-stage DEORE entry-level ** is about 2500-3000 yuan, and the 7-stage entry-level is about a few hundred yuan.

So it's definitely the best 9 paragraphs, but 9 paragraphs are also divided into a lot. It is best for novices to start with an entry-level car, and buy a Warrior or ATX 660 with a vehicle of about 1000 is a very classic 7-stage entry car, and light off-road is also enough. Diving in the forum, many of the same riders often ride.

If you have more experience, you can change the car directly, and as for what car to change, you can do what you can. Anyway, what suits you is the best. If you have enough money, an 8-section car on the Duke or ATX 750 is also good.

The 9-stage car is just a shifting system, in fact, the frame, fork and so on are very important. Welcome to the Ride Tour!

Of course, the 27-speed is okay The 24-speed is the entry car, the 27-speed should be smoother and smoother, and the 27-speed transmission package is more expensive than the 18-speed, 21-speed, and 24-speed gearbox.

To put it simply, the more gears the better, and the more you change gears, the smaller the speed difference will be, and the physical wear and lactic acid accumulation will be reduced. You can ride faster and farther, of course, this is in terms of speed and competition, the difference between riding a bike at ordinary speed and riding is not particularly big, and it will only be more obvious at very high speeds.

The 27-speed is the best, the transmission system can be smoother, more delicate, and more able to find the gear ratio that suits you.

It's useless to say so much, usually there are 18 enough to press the road, if you are interested in outdoor riding, then go up to 21 or more, and then go up to be honest when you don't need to race. It's a bit that the more you shift, the easier it is to find the right shift ratio and the more comfortable it is.

It's hard to say, the more speed, the more troublesome, but the speed you choose is the most, and it's easy to find a feeling. In short, it depends on your hobbies.

Of course, the more mountains, the better.

This situation is very likely that Taki slipped his teeth!

This is the base of the spinning hub, and you can see that threads are used in conjunction with the flywheel.

The spin fly is officially combined with the hub through the thread of this five-millimeter model, which can cause slippage (o) when pedaling too hard

According to the description of the landlord, it seems that there will be a problem once you step on it vigorously, and this one is more like a slippery tooth ==

Another possibility is that the ratchet inside the flywheel is broken, the pawl rebound is not smooth, the landlord can try to step on it upside down and then suddenly step on it will not be empty...

Try it and you should know what the reason is, if you slip the teeth, it is recommended to disassemble the flywheel to see if the thread of the flywheel is broken or the thread of the tower base is broken (if the flywheel is broken, it would be good to replace it with a new one, tz21 is about 30 pieces.) If the base of the tower is broken, the hub will be replaced.o(> oAs for whether the hub can be replaced.。。。 Forehead...

It is recommended to change the card flywheel group directly, and the card fly will not have the problem of tower base slippage.

You may have one or more problems such as over-worn chain teeth, over-worn chain, over-worn flywheel tower, or damaged jack gear. It is advisable to check all the components of the entire drivetrain and the rear axle, and personally recommend focusing on the flywheel tower and jack, which are the two places with the greatest possibility of excessive wear or even damage, according to the phenomenon of LZ.

If mountain bikes are used for sports, it is recommended to do a small maintenance in 1-3 months and a major maintenance every six months. If it is used for transportation, it is recommended to do a small maintenance every 3-6 months and a comprehensive maintenance every year. Because mountain bikes tend to have a relatively large load, the concept of riding a mountain bike is that the quality of mountain bikes will be better and more "resistant", so it is easy to ignore its maintenance and maintenance problems.

Mountain bikes are indeed more durable than other bicycles, but there are also limitations, and this degree is often not as big as many people think, so the maintenance of mountain bikes cannot keep up, but it has become the most problematic bicycle type. Therefore, it is recommended that LZ, even if it is a mountain bike, you should cherish it.

The above is based on personal experience, pure hand. Hope it helps.

The frontal ,,, drive system is worn,,, chain, flywheel, and crankset, and are replaced in turn! Change the chain first, and then change the flywheel like that. If you change the crankset like that, it has nothing to do with the bottom bracket

Hello! Hello, the car is going backwards, and the flywheel will turn backwards with it. This is normal.

The reason for this phenomenon is determined by the internal structure of the flywheel. The part of the flywheel that is connected to the bearing is called a ratchet, so let's introduce the ratchet.

Below is a diagram of the construction of a mountain bike ratchet. This picture is drawn by myself, the red one is the metal shrapnel, when the outer ring part rotates clockwise, the shrapnel will jam the outer wheel, and at the same time drive the middle bearing to rotate, when the outer ring rotates counterclockwise, the shrapnel will bounce off one by one, which is the clicking sound of the rear flywheel when you ride a bicycle and slide.

In the same way, when the middle bearing is twisted, the shrapnel will jam the outer ring and cause the external gear to rotate. The picture is hand-drawn by myself.

There is also a picture that was searched on the Internet, and I hope it can be displayed more clearly. <>

Satisfied!

It's normal for the car to retreat and the flywheel to spin with it... It's a problem when you push the cart forward, and the flywheel also rotates.

v=10 9 is found by v 2-0=2as, the resistance is the resultant external force, f=ma, and it can be found.

Constant motion, the final velocity is 0

v-square=2as---a=v-squared 2s

f=am, f=f-resistance.

f=v square m 2s---f=10 9*10 9*100*cow probably did this It was probably the same years ago, but now I can't say, haha.