It should go without saying that the link SDK posted is a specifically anti-helmet one, so the studies they quote are unsurprisingly ones which don't support a pro-helmet argument.
Don't take this as me being pro-helmet, I wear one but I don't think the statistics are compelling either way. Reportage of cycling injuries is obviously terrible, and there's so many hygeine factors that most studies are meaningless.
For instance- the number of mtb injuries increases, even though protective gear gets better and helmet wear is the rule. Why? Well, the birth of the modern helmet- 1990- more or less coincides with the birth of the modern mass production mountain bike, so at the same time as the gear got better, the bikes became capable of more daftness. Cycling trends and road trends also change, so you can't distinguish any one factor.
The biggest problem is that if a piece of protective gear prevents an injury, then it's not a statistic. You just can't statistically prove that helmets are making any difference, because nobody collates "I had a crash and I think my helmet helped" stats.
There's another factor, which is that an injury doesn't have to be permanent or crippling to be worth avoiding. If you suffer a minor injury on a day's riding, that ruins your day, and can lead to time off the bike as well. In fact, given the relative rarity of major injury for cyclists, this minor injury prevention could have a bigger impact for most riders. I always wear pads (mainly because I'm osteoperotic, brittle bones) but it means that I'm far more likely to just dust myself off and carry on.
I've crashed and fallen off my mountain bike more times than I count and every time I ‘ve landed on my knees, elbows or hands.
Yup. For me, most of the time I'd sooner ride without a helmet than without my knee pads. Brains are well protected with a solid bone, and well located in a crash. Knees are delicate, load bearing and fundamentally fragile, and they're the bit you land on most. You're more likely to sustain a crippling leg injury in a single-vehicle cycle crash than a crippling brain injury. You're not especially likely to suffer either though. Course, a crippling brain injury is far worse news than a crippling leg injury, so I try and avoid both
Bike helmets offer protection up to 12mph head velocity, anything above that and the helmet does nothing to absorb the shock.
Not at all- they're rated to absorb at least that (and some do exceed it- though it seems that many on the market actually don't meet the CE standards), but it doesn't mean that the second you exceed this force they become worthless- they still absorb the same amount of force, so the amount transmitted is still reduced.
It's also worth mentioning that only 1 in 7 hospitalising cycle crashes involves a third party- the huge majority are rider error, so the popular argument abiut vehicular impacts isn't really all that valid
Oh. Lastly, my helmet gives me a convenient place to mount my light
