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  1. #1
    Senior Member Brian's Avatar
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    Who wants to be famous?

    Ok, famous on bikeforums.net anyway. BMX needs a sticky that covers most of the questions that get asked over and over. You know, cro-mo vs hi-ten vs aluminum. 36 or 48 spokes. 3/8 vs 14mm axles. Which bikes are good for parks/dirt/vert/street. A guide to brakes and gyros. How to lose weight on your bike by cutting down your bars and seatpost. All that important stuff. If someone wants to write it all up, or several people handle little bits, we'll make it a sticky, and update it as needed.

    This is your chance to put your money where your mouth is, and show everyone how much you know.

    Reply here, or PM me.

  2. #2
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    I'll take care of it. Give me a few days to write it up, and add sources, links, and whatnot.

    edit: Actually, I take that back. I'll let someone else do it so that I can tear it to pieces and cause them to feel insecure about themselves.

  3. #3
    Senior Member Brian's Avatar
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    Cool.

    [edit] Damn!

  4. #4
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    I don't have that much time on my hands, anyway. All work (and school) and no play makes Jack a dull boy.

  5. #5
    your mom
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    why doesnt someone make a thread that has links to other threads that cover the questions?
    "Do not worry about tomorrow, for tomorrow will worry about itself. Each day has enough troubles of its own." - Matthew 6:34

  6. #6
    Senior Member Brian's Avatar
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    Redrum. I'm packing for our move, and I won't be on for a while after the move. I'd like to see this done in the next week. Hopefully someone else will volunteer.

  7. #7
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    Yeha, I would, but I know i'm not the most knowledgable when it comes ot the specifics. I'll try and handle some of the easier questions if I have time.

  8. #8
    Senior Member Brian's Avatar
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    Quote Originally Posted by enormungus
    why doesnt someone make a thread that has links to other threads that cover the questions?
    Because we have a search function for that. Would you like to link up all the old threads? And they all get off topic too. We need a "BMX basics" thread that explains it all in one thread, which we could update as needed.

  9. #9
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    Bottom brackets

    The Bottom Bracket(or BB)is located where your downtube, and chainstay meet. It is the hole in your frame that your spindle for your cranks goes through, and where you berrings sit. There are 4 different types of Bottom brackets.

    Note-In order to run a certain type of BB berring, your frame must correlate to it. Example: You can not use American berrings in a Euro/Spanish/Mid BB, ONLY in American BBs.

    American-American has the largest diameter of the 4 BBs. Also the heaviest, but with that comes more strength than the other 3(edit that part if I am wrong). Americna BBs need to be pressed into your frame, by using a proper cup press, or a piece of wood and a hammer.

    Euro-Euro has the smallest diameter of the 4 BBs. Euro berrings have threads along with the inside a Euro BB, so you do not a need a press, or a hammer to put them in. Euro berrings are so small that they use 4 berrings(two on each side)to spread the load, unlike any of the others. Since it is smaller, it is considerably lighter than American. Ex/Beerman, I am not sure how the weight of Mid, Euro, or Spanish level up, so edit that in please.

    Mid-Mid BBs use an R12 size berring. This berring is smaller than American, but bigger than Euro. These berrings do not require a press or hammer either, you can simply "snap" them into your BB with your finger. These also save weight considerably when compared to American.

    Spanish-Spanish berrings are smaller than Mid, but bigger than Euro. They "snap" into your BB the same way as Mid berrings do. [EDIT] EX/Beerman, I'm not sure about other info about Spanish, so maybe you could finish it up. Thanks

  10. #10
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    Wheels

    Rims-Rims can come in either single wall, double wall, or triple wall. Single wall means that there is only one horizontal wall in the rim. Double wall means that there is 2, thus more strength and more weight. Tripple wall(as you might have guesed) has 3 horizontal walls, thus, even more strength, and more weight. Most riders use rims that feature double walls, they are very strong, but arn't over kill like the tripple walls. Single wall rims are to light, and hardly have any strength. Some of the more popular rims are, Odyssey Hazard Lite, Odyssey Midway, and Primo Hula Hoops.

    Rims can come in chrome, black, and some anodized colors, and a few come in chrome/black. When it comes to braking, brake pads grip the best to Chrome rims, black smears and slips, and i'm sure chrome/black would do the same. Anodized rims(such as the Odyssey Durrelectra), brake nearly as good as chrome rims.

    Rims come in your choice of 28H(for racing mostly), 36H, and 48H. The "H" stnads for "hole", as in hole in the rim. Each hole corelates to a spoke. More spokes = more strength, and more weight. 48H is what begginers should have, becasue as a begginer, they arn't the smoothest, or the best at upkeeping their bike.

    Spokes-Spokes can change a lot when it come to your wheel. Regular spokes are 14G. Spokes can come in many varieties.

    Color-either stainless, or black. If you get Primo Forged spokes, you can get Blue, red, yellow, ect.

    Material-Most spoeks are stainless steel, but you can get Titanium spokes to save some weight.

    Size-Most spokes are 14G, but you can get 12G spokes. They will make your wheel stronger, and significantly heavier. These are considered by many to be a waste. You can get double butted spokes as well. Double butted spokes are 14G near each end, but tapper down to 15G in the center to save weight. I am not positive about this, but a 48H wheel with double butted spokes is only about 38% stronger than a 36H wheel with regualr 14G spokes.

    Nipples-Niples are the little things that sit into the holes in a rim that the spokes thread into in order to keep the wheel together and true. They come in a variety of colors, and 2 different materials, Brass, and Alloy. Brass is standard, but heavier than Alloy by a few grams. Alloy is lighter, but it is also a softer metal, so it strips easier.

    I am not going to get into hubs, because that is a LOT of typing, and i'm not 100% sure about some of that stuff. So i'll let Beerman or Expatriate handle that.

  11. #11
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    That's so full of errors. Here's my version:


    Bottom Brackets

    The Bottom Bracket (BB) is located where the downtube, seattube, and chainstay meet. It is a tube that bearings sit in, and allow the crank spindle to rotate. There are four main different types of bottom brackets: American, Euro, Spanish, and Mid. Lesser used varieties include the Yorkshire, ISIS, and the Press-Fit Euro.

    The American has been the traditional bottom bracket on BMX bikes for many years. However, it is far from standard; there have been a wide variety of inner diameters and widths over the years, and there has never been a standard size for it. American BBs work by pressing a pair of steel cups into the frame, with either a cup-press or - more generally - by pounding them in with either a rubber mallet or a hammer and a 2x4. The bearings and spacer are then placed into the cups, and the spindle is slid in. Grease is recommended, but not required for installing the cups, but is necessary on the spindle.

    The Yorkshire - designed by "G-Sport" George French - is not at all widely used, but is similar to the American. It has a standard width and diameter; basically, it a 16g steel tube of 2" diameter cut to a length of 66mm. It uses plastic cups, which allow it to accept American-sized bearings.

    The Euro, although lighter and lower profile than the American, is far less durable; rather than using a pair of large bearings, it uses four smaller ones set in a pair of steel or aluminum cups. These are installed by threading one cup in, inserting the spacer and sliding the spindle in, and then threading the other cup in. Of course, the threads should be greased beforehand on the threads and spindle.

    ISIS - a mountain bike standard - is rarely used on BMX bikes; simply put, it is a large-diamater of the Euro.

    The Mid - designed by FBM - uses R12 bearings, the standard bearings for the American on cranksets that uses 19mm (3/4") spindles; for cranksets with 22mm spindles, custom-sized bearings and spacers must be bought separately. To install a Mid, grease the bearings, spindle, and the inside of the bottom bracket up until the lip, push in one bearing (depending on how tight the constraints are, you may be able to do this with your hand, but in some cases a rubber mallet is necessary), insert the spacer, slide the spindle in, and then press in the other bearing.

    The Spanish - designed by Fly - uses bearings smaller than the American/Mid/Yorkshire uses, but larger than those on the Euro. The installation method is the same as that of the Mid.

    The Press-Fit Euro is rarely used, and follows the Mid/Spanish method of directly pressing the bearings into the frame; however, instead of using larger, more durable bearings, it simply uses regular Euro bearings, although exactly which bearings (as different cups use bearings of different sizes) varies from manufacturer to manufacturer.

    Note: Aside from American-Yorkshire-Mid, and the Euro-PFEuro, bearings are not interchangable. MacNeil produced plastic cups for the Spanish that allowed them to use normal Euro bearings, but these were not popular and did not fare well on the market, so they are no longer available. Fly also produces a Euro-Spanish conversion kit that holds Spanish bearings outboard of the bottom bracket; this has similarly proved unpopular.

    For more information on the advantages and disadvantages of the major bottom bracket types, please refer to George French's tech column in Ride UK #79, which can be accessed online here. Please note that this article is older, and is not entirely up to date.
    Last edited by CMcMahon; 01-29-06 at 10:36 AM.

  12. #12
    Senior Member Brian's Avatar
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    So how about we just post contributions here, and once they're edited and corrected, I can add them to the sticky? I'll give credit to each contributor too.

  13. #13
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    I knew whatever I typed out wouldn't be perfect and that Beerman would just kill it. I planned for that to happen, now(thatnks to my supreme intelect)we now have a section done.

    So Beerman, could you go ahead and revise my other one now? Please?

  14. #14
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    Hey Beerman! I have a question that needs answering. Why, oh why isn't there Ti nipples? TI is lighter than brass, and lighter thatn some Alloys, but it wouldn't strip like those do. Why isn't this made yet? Someone call up Knight Bike Co. and find out. Tell em BMichaelX came up with the idea, and he wil test em for you for free. Thanks.

  15. #15
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    Quote Originally Posted by Beerman
    That's so full of errors. Here's my version:
    You forgot about the zimbabwe BB. That's what I have, I prefer a wood spindle to this dumb Ti.

  16. #16
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    Beerman - I think you mean seat tube, not seat stay.

  17. #17
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    Quote Originally Posted by bmichaelx
    You forgot about the zimbabwe BB. That's what I have, I prefer a wood spindle to this dumb Ti.
    Oddly enough, some kid sent me a bunch of pictures to put up on my site (of which only one was useable), and he IMed me later, asking me if I was going to put them up, and I mentioned that I was working on a bottom bracket guide for a different website, and then he said "I'm going to invent a Zimbabwe BB."

    Weird.


    Quote Originally Posted by dooley
    Beerman - I think you mean seat tube, not seat stay.
    Indeed. It's fixed now.

  18. #18
    Keep it real BikerLRY's Avatar
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    Yeah, don't forget that 14mm axles are better than 3/8 axles, for street, park, and dirt. Unless your racing.

  19. #19
    Senior Member Brian's Avatar
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    Ti nipples would be a waste. You might as weld your spokes to the rim.

  20. #20
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    It would be a waste for sure, but sin't Ti nuts, and stem bolts a waste as well? YOu know if it saved any weight at ALL, people would buy them.

  21. #21
    Keep it real BikerLRY's Avatar
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    Aluminum is not good for parks or street riding. If you want to ride street and park I suggest Chromoly.

  22. #22
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    Begginer Tricks

    If you are just starting out in BMX, here is a short list of tricks you should start to get to know.

    -Bunnyhopping-A bunnyhop is when you lift your front wheel of the ground, and then your back wheel, making your bike air born. The trick to bunnyhops is the same as everything else...PRACTICE! There is no "pro hopping", or broncos, or j-hops, or whatever other crazy names you hear. It is bunnyhopping(as explained above), and then there is a nollie, which is the opposite of a bunnyhop, and harder than a bunnyhop. First you lean forward and pop your back wheel of the ground first, then you lift your front wheel. THIS IS A NOLLI! Not anything else.

    -Manuals-A manual is a wheelie, except no pedaling. If you realy want to progress, do not do weelies. They will not help you at all in the long run. Do manuals all the time everywhere, untill you get them down. It's a good thing to know how to do. For a manual, you want to have your arms straight, and your knees bent slightly, if your front wheel starts to go to high and you feel like you're goign to fall back, you bend your knees more, and that will push the fornt of the bike down. If you front wheel is going down, you straighten your legs, and pull back. So on and so forth. This takes a while to get down. PRACTICE!

    -180s-Do a bunnyhop, except you want to be pulling up to one side(depending on what feels most comfortable to you). Whne you go to kick your back wheel up, you want to push your legs agaisnt your frame in order to whip it around to get the full rotation of the 180. The best places ot try these are on banks, small quarter pipes, and on the ground.



    I don't have time to write up anymore, but this is a good start. Anyone can fell free to add onto this.

  23. #23
    Senior Member Brian's Avatar
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    Ok, do you guys want this or not? Someone write about what they know, so we can get it added to the thread.

  24. #24
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    I tired, but Beerman yelled at me.

  25. #25
    Senior Member Brian's Avatar
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    Ok, here's my offer to you. Go to your previous posts, and use the edit function. Then cut and paste it into Word. Use the spell check to correct the frightful spelling. If you do that, I'm sure one of us will check it for technical accuracy, then I can add it to the sticky.

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