Questions tagged [bmx]

BMX is a style of off-road bicycles used for racing and stunt riding. It also refers to the sport itself.

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-1
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1answer
225 views

Free agent model? [closed]

need a little help to figure out the model and the year of this Free agent
-8
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1answer
571 views

I have a bmx I can't figure out with a stamp of ia* on bottom side front of frame

Ok I just aquired a bmx through trade with a stamp of ia* on bottom side of frame and a serial # of wtu208po15oh and a secondary # of 312962
2
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1answer
415 views

My crank slips I think

I've got a 2015 premium bmx. When I start to pedal, the left crank kinda slips, if that doesn't make sense, let me siimplify it. When I pedal, it's like it doesn't grab the chain or something, like it ...
2
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1answer
300 views

Measure Spoke Tension on BMX Wheel

I'm building a 20" BMX wheel. I want to check the spoke tension, I'm not sure how to do that accurately. It's a high flange hub laced 3x with 186mm spokes. Because of that, the cross is just off ...
18
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2answers
26k views

What is the name of the part, often seen on BMX bicycles, that allows an additional rider on the back the bike?

What is the name of the part, often seen on BMX bicycles, that allows an additional rider on the back the bike? It appears to be a set of relatively short but thick poles that go on either side of the ...
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2answers
275 views

Does anyone know what frame my bike is pls? [closed]

Hi need help finding out what frame my BMX is. Serial number is YSEL11E1518 under next to serial number says made in Taiwan ). Wheels are from a different bike I think pls help ??
-7
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1answer
8k views

Mongoose bmx ,serial number identification [duplicate]

A while back I bought a an old Bmx bike I'm certain it's a mongoose but I'm not sure what year I plan to restore it but I'd like to know exactly what it is first. Can anyone help with serial number ...
-3
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1answer
132 views

I have a bike that I would love to know what kind

I have a bike that I would love to know what kind it is if anyone can help it would be grateful.. The serial number is 0960668010 and I can fix it anywhere
19
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4answers
14k views

Why is BMX gearing so low

I was watching the BMX racing on the 2012 Olympics and the gearing seems incredibly low. About half way down the start ramp they are already going too fast to keep pedalling and they barely seem to be ...
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1answer
352 views

Can you identify this bike/frame?

Hello though this might be a good place to ask this.anyone knows this bike?
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1answer
10k views

I need help to identify my bmx bike by using serial numbers

20" bmx freestyle bicycle Serial number is SNACEOSF18391
-1
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1answer
638 views

I've got a old school chrome bike serial number starts with AV can you please identify what kind of bike I have

These are pictures showing the front of the bike and rear. Please let me know if you can identify this bike.
27
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4answers
10k views

What is the foam tube on the top of bmx frame for?

What is the foam tube found on some bmx bikes for? Here's an example: Besides for advertising, I'm guessing its there to save biker's legs when doing tricks, but I could be wrong, because I've seen ...
4
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1answer
236 views

What year and make BMX do I have?

Front back spring shocks 1970s. I'm sure is this a kawasaki BMX EDIT from duplicate question. After a lot of digging, I found that it is a 1975 Montgomery Ward Silver Fox
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1answer
221 views

What kind of BMX bike did i find?

got this bike for free at a local car repair service. It had been sitting there for a long time.
-3
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1answer
107 views

How do I get the right parts for my BMX? [closed]

Was told it was a Sunday bmx 20" just don't know the year, so how will I know how to order the proper parts? Serial number is wtu148p048e.
-2
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1answer
2k views

how can i determine the model of dyno brand BMX i have

I have a dyno vfr 3d dropout flat oval bike. How can I find out what it is? The serial number is S9ET18105.
17
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2answers
7k views

Can riding without a chain damage a bike?

I've been really struggling learning to ride fakie (backwards) on my BMX. Tonight, an idea occurred to me. If I remove the chain from my bike, it'll be a "free coaster," and I won't have to pedal ...
4
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1answer
212 views

Rear sprocket clicks or points of engagement

I'm a dad learning about BMX racing and I want to know what the difference is between a sprocket which the bike shop says as 90 odd clicks, then starts talking about points of engagement. Does the ...
0
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1answer
248 views

I don't know what kind of bike this is. I need the name of this frame before I trade somebody

I need help identifying this bike. I've tried looking up the colors, tried looking up the logo but can't make out what the logo is. Please help
1
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1answer
76 views

What kind of dyno is this?

Can anyone help me out. Just pick this dyno up and have no idea what kind it is.
3
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1answer
134 views

507 rims on a narrow frame

I bought my son a powerlite Jr cruiser. He would like to but a bigger tire on it. It currently has 520mm 24" wheels with 1" tires. Question is how wide is a 24" 507 bmx rim? I can't find specs ...
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2answers
960 views

What kind of 24 inch bmx is this?

I have a 24 inch bmx and have no clue what it is. I need help please!!!
12
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7answers
15k views

Why are BMX saddles so low?

I've seen a lot of teenagers riding BMX bikes recently. It seems that most if not all of the guys I've seen riding their BMX bikes around the streets, car parks, local parks, etc have a frame that's ...
-1
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1answer
108 views

Strange tube leak [duplicate]

So I have this bmx bike where the back tire's inner tube was leaking air and I'd have to inflate it every day or so. And I just got a new tube and it's having the same issue. Anyone got any ideas?
3
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5answers
10k views

Alternative Chain Grease/Lube [duplicate]

Can I use this general-purpose lithium grease on my chain until I can get some Finish Line lube?
2
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1answer
105 views

Handlebar of my bike will not bolt onto the front forks

I decided I'd like to remove my front brake from my bmx, but having looked closer i realised I was looking at a gyro brake system. I proceeded anyway, thinking this wasn't going to be a problem, and I ...
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1answer
191 views

Can you identify this probably-stolen BMX I paid $15 for? [closed]

I have purchased this BMX bicycle for $15 USD. Can somebody please tell what kind of BMX this is and if I got a good deal?
2
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3answers
5k views

My stem keeps moving side to side even thought I tighten it

I just got a new Demolition Stem.I tight it with all my force And It keeps slipping side to side Like it doesnt match with the fork lined up And whenever I check it its fine but after a while it is ...
2
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0answers
148 views

What brand is this BMX frame?

Can anyone tell me what bmx frame this is? I can't find anything about it.
2
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0answers
75 views

What year make and model of my haro frame [duplicate]

I have a haro frame that I believe is a 1986 haro group 1 but the only difference is that it doesn't have a place for the kickstand like the rest I've seen
5
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1answer
12k views

How many freewheel thread sizes are there?

I'm buying new freewheel and noticed that not every freewheel can be screwed onto my hub because they have different thread sizes. For example: I've found the following thread size specifications: ...
0
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1answer
420 views

What brand is this (maybe Eastern) frame? Is it good for a first bike?

What brand is this frame? I think it may be Eastern but I'm not sure. Also is it good for a first bike?
3
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1answer
37 views

Bmx tire hole. Won't pump up!

So I found a small thorn in my tire. It did make a hole in my tube so I replaced it after trying many solutions. My question: I'm wondering if because there is a hole in the tire but not the tube, why ...
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1answer
25k views

How to tell what BMX frame I have?

How can I determine what kind of BMX frame I have if I there no decals on the bike when I got it? I got it from my dad who found the frame and we put it together, but I am clueless as to what brand or ...
3
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2answers
377 views

Should my aftermarket frame have a serial number on it?

I was riding a mostly custom WTP Crysis frame which had a serial in case the bike was lost or stolen. I snapped the drop out arms on Sunday and ended up buying a new FBM Hard Way frame. I checked all ...
3
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2answers
572 views

I bought a used 20 inch bmx bike from bike shop but no one has any idea of the brand

Could someone help me narrow this down? I bought a new-used bike from local bike shop in Sacramento, California, USA. I do not know what brand it is and so were the bike shop. There are no stickers ...
2
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0answers
94 views

Chain vs seatstay with a 50T Chainring - BMX frame

I plan to put a 50T chainring on my bmx but I am afraid to have an interference between the chain and the frame. Does anybody know what is the critical distance between the seatstay and the chain so ...
2
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2answers
1k views

Which master links for 1/8 inch aka BMX chains?

It was very easy to find master links for 3/32inch (aka 9-speed chain) but I cannot find them for 1/8 inch (aka BMX chain). My chain is the Nexus CN-NX10. Cannot understand the odd observation that ...
5
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1answer
7k views

Can I add gears on a bmx?

Just asking if it is possible. My friend added gears, but won't it damage the look or my cycle?
3
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1answer
744 views

BMX V-Brake lever for MTB compatibility

Shimano have this v-brake levers in the product family DXR for BMX. Is there any difference between a BMX brake lever and an MTB one? Are they smaller?
6
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2answers
2k views

Why do riders swing the bike out sideways when jumping?

When people do really big jumps on a bicycle or motorcycle, they'll swing the tail of the bike way out to the side once they've taken off. Then it rotates back under them by the time they land. Do ...
6
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3answers
43k views

Advantages / disadvantages of freecoaster and cassette hubs

I've been reading a lot over the past few days about BMX, and last night I watched a few videos like this one. I have been seeing the words "freecoaster" and "cassette" around a lot, and I was curious ...
6
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2answers
2k views

How can i get the most air from a jump?

I'd like to know what technique/s to use to get both the most height, and the most distance from a dirt jump. The stock image below is the kind of dirt jump I'm referring to.
5
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2answers
969 views

What is a good method for constructing dirt jumps?

What is a good method for constructing dirt jumps? Not massive jumps, just something more than a simple mound of dirt for a bit of fun. It's one thing to pile up the dirt, but there seems to be a bit ...
2
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1answer
220 views

BMX: Freestyle vs Supercross?

So I understand the difference between the sports but how diifferent are the bikes? are they essentialy interchangeable or are there special racing BMXs?
7
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1answer
214 views

Effect of BMX bike geometry on manualing

What aspects of the geometry of a BMX bike have an effect on the ease (or lack of ease) with which a manual can be performed? Obviously there is an element of skill to performing a manual, but do ...
2
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1answer
2k views

Ideal top tube length for BMX

Regarding BMX bikes, is there an easy way to determine what top tube length is most suitable for a person based on their height? In my experience, most LBS only want to talk about BMX size in terms ...
1
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1answer
455 views

How do you remove the sprocket from an eighthinch splined BMX style crankset?

I have the EighthInch Freestyle Splined Crankset. These are very similar to profile bmx cranksets. I purchased a larger sprocket to use with the crankset. I've used a crank puller to remove the drive ...
1
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1answer
376 views

What is the usual value of a Fit bike pro bmx second hand?

There are some photos of the bike http://imgur.com/a/rIozR Can I get a rough value of it?