bicycle helmet quality image
mipy
I am looking to buy a bike, preferably a BMX although I do not do tricks, but I would like to cruise around the city with my pals. I don't really want to spend over $120, but I do want some quality. Haro? Redline? Mongoose? Also, does spray painting the frame of a bike totally mess it up? Thanks everyone! :)
Answer
BMX bikes are TERRIBLE for actually going anywhere. They're only good for tricks. Why are they terrible? They're completely designed for tricks, with a saddle that doesn't get in the way during tricks (not fit for riding comfortably), bars that come high for more controls during spins (you'll be stuck upright in the wind, good luck getting over 15mph or so), etc. You'll be standing up to pedal the whole way (uncomfortable for extended periods) and it'll just be a generally unpleasant experience. If you end up sitting on the saddle, you'll be one of those funny guys I see commuting with their knees hitting their chin on the upstroke of the pedal stroke, hah.
if you simply want to trot along at a casual pace with friends, get a cheap beach cruiser, which might be the only thing you can afford with $120.
If you actually want to *go* places, and go places quickly, you want a road bike. Vintage road bikes can be had for cheap, within your budget, but you'll be put over your budget with accessories (helmet: 20, lock: 20, lights for night riding: 20, random parts you'll need for old bike repair: 20ish). Plus you need to know what you're doing when you're shopping for used bikes.
I pass BMX/cruiser guys all the time on my 1987 Japanese road bike I picked up for $100 on craigslist, in need of about $30 worth of repair. Sometimes, I see those I pass start sprinting in some manly, testosterone-driven spur of the moment competition, but there's no way they ever catch up to me on my road bike with thin, high pressure, slick tires (less rolling resistance).
Also, you said you want 'quality.' There's no way in hell you're getting that with $120 worth of department store bike. Either spend a few weeks learning about bikes, and then buying a used one that'll suit you, get a friend to help you find a used one to suit you, or go to your local bicycle shop (LBS) and tell them your requirements. Your LBS is going to be your best friend if you go in with enough money.
BMX bikes are TERRIBLE for actually going anywhere. They're only good for tricks. Why are they terrible? They're completely designed for tricks, with a saddle that doesn't get in the way during tricks (not fit for riding comfortably), bars that come high for more controls during spins (you'll be stuck upright in the wind, good luck getting over 15mph or so), etc. You'll be standing up to pedal the whole way (uncomfortable for extended periods) and it'll just be a generally unpleasant experience. If you end up sitting on the saddle, you'll be one of those funny guys I see commuting with their knees hitting their chin on the upstroke of the pedal stroke, hah.
if you simply want to trot along at a casual pace with friends, get a cheap beach cruiser, which might be the only thing you can afford with $120.
If you actually want to *go* places, and go places quickly, you want a road bike. Vintage road bikes can be had for cheap, within your budget, but you'll be put over your budget with accessories (helmet: 20, lock: 20, lights for night riding: 20, random parts you'll need for old bike repair: 20ish). Plus you need to know what you're doing when you're shopping for used bikes.
I pass BMX/cruiser guys all the time on my 1987 Japanese road bike I picked up for $100 on craigslist, in need of about $30 worth of repair. Sometimes, I see those I pass start sprinting in some manly, testosterone-driven spur of the moment competition, but there's no way they ever catch up to me on my road bike with thin, high pressure, slick tires (less rolling resistance).
Also, you said you want 'quality.' There's no way in hell you're getting that with $120 worth of department store bike. Either spend a few weeks learning about bikes, and then buying a used one that'll suit you, get a friend to help you find a used one to suit you, or go to your local bicycle shop (LBS) and tell them your requirements. Your LBS is going to be your best friend if you go in with enough money.
How do bicycle helmets work?
Forgetful
There is a "shell" and a "liner" in a bicycle helmet, right? what is the purpose of those things? Is the shell supposed to stop it from breaking or is the liner supposed to be crushed?
Simple language please.
thanks!!!!!
Answer
There are variations depending upon the quality of the helmet and the purpose... for example, some DH helmets are practically MX helmets now but, in general...
Bike helmets have the liner and shell as you've mentioned, the liner actually does the majority of work in saving you from a fall. The shell is really just there to prevent things like stick and such on the tral from penetrating the liner and stabbing you in the head, or to keep the liner from coming apart on hard impacts. The liner is what handles the energy transfer that prevents you from sustaining severe injury. When you take an impact, the liner is supposed to get crushed... in doing so, it converts the kinetic energy (the energy of an object in motion) of the impact into thermal energy (heat) as the liner is crushed. Remember, energy can never be created or destroyed, it can only change forms... The type of material used in the liner and the overall quality of the helmet determine just how effective it is but that's the basic principle in ALL helmets actually. Most common helmets use an EPS liner, Expanded PolyStyrine, and are good for just one serious impact... Once the liner has been crushed, it no longer has the capacity to be crushed much further to allow for the conversion of energy needed to protect your head. Some other helmets use materials that allow the energy conversion to take place repeatedly and only need to be replaced if the shell material is compromised... these are typically MX helmets or very high-end downhill helmets.
Also, it's worth noting that essentially all bike helmets pass the same certifications so there isnt a whole lot of difference in protection between a $40 helmet and a $140 helmet... Most of the extra money that you pay goes into what was spent on R&D to figure out a way to incorporate more vents into the helmet without lessening the protection offered.
There are variations depending upon the quality of the helmet and the purpose... for example, some DH helmets are practically MX helmets now but, in general...
Bike helmets have the liner and shell as you've mentioned, the liner actually does the majority of work in saving you from a fall. The shell is really just there to prevent things like stick and such on the tral from penetrating the liner and stabbing you in the head, or to keep the liner from coming apart on hard impacts. The liner is what handles the energy transfer that prevents you from sustaining severe injury. When you take an impact, the liner is supposed to get crushed... in doing so, it converts the kinetic energy (the energy of an object in motion) of the impact into thermal energy (heat) as the liner is crushed. Remember, energy can never be created or destroyed, it can only change forms... The type of material used in the liner and the overall quality of the helmet determine just how effective it is but that's the basic principle in ALL helmets actually. Most common helmets use an EPS liner, Expanded PolyStyrine, and are good for just one serious impact... Once the liner has been crushed, it no longer has the capacity to be crushed much further to allow for the conversion of energy needed to protect your head. Some other helmets use materials that allow the energy conversion to take place repeatedly and only need to be replaced if the shell material is compromised... these are typically MX helmets or very high-end downhill helmets.
Also, it's worth noting that essentially all bike helmets pass the same certifications so there isnt a whole lot of difference in protection between a $40 helmet and a $140 helmet... Most of the extra money that you pay goes into what was spent on R&D to figure out a way to incorporate more vents into the helmet without lessening the protection offered.
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Title Post: What kind of bicycle would best fit my lifestyle?
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