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2h
comment Bicycle Frame: Aluminium?
Yeah, the photos don't appear.
17h
comment Best ways to avoid getting hit by cars?
This is simply part of the "claim your lane" strategy that most experienced cyclists employ. There are times when you should swing wider, and times when you should squeeze closer to the shoulder, but mainly you stay about a third of the way out in the lane.
1d
comment Pedals feel like they are too far back
The seat is too far forward.
1d
comment Standing vs. high rpm for acceleration
It depends on the individual, but generally if you're over about 110 RPM you're wasting too much energy in simply spinning your legs. But this can get to be a contentious issue. (Saw a study of this about 25 years ago in the LAW magazine and lab tests indicated that over 100 RPM is probably not justified.)
1d
comment Tire Continually going flat
@altomnr - Of course, rim tape will do no good if the spoke is too long.
1d
comment Speed and distance for a beginner
@mattnz - And they look so sexy!!
1d
comment Speed and distance for a beginner
As to cadence monitors, good ones are few and far between. Whatever you do, don't get the Cateye Strada wireless model -- worst design I've ever seen.
1d
comment Speed and distance for a beginner
Yeah, I suspect that more people die from lack of exercise due to waiting to get a doctor's OK to exercise than die from exercising when they should have first gotten a doctor's OK.
1d
comment Speed and distance for a beginner
Yeah, start with rides of 30-60 minutes. You will feel a desire to go longer when you're ready. Make sure your seat is high enough (most aren't) and try to keep your cadence (rate of turning the pedals) above 60 RPM when not climbing a steep hill. And give your butt a chance to acclimate before you go looking for a new seat.
1d
comment Front and Rear speed shifters aligment guide
Yeah, it takes some bit of mechanical skill and know-how, but using the Park Tool and Sheldon Brown web sites, and being patient, it should be possible to properly align your derailers. The main thing is to not try to rush it, but go through the full alignment procedure. Then do it a second time.
2d
comment Tire Continually going flat
If you're repeatedly getting a hole on the spoke side ("inside" of the tube) then you almost certainly have a spoke poking through.
2d
comment What is the second thread on the crank for?
Something along those lines.
2d
comment Best ways to avoid getting hit by cars?
You failed to mention chickens. I once hit a chicken, and though it was a fair thump, it did not cause a crash. (For me that is -- unsure of the chicken.)
2d
comment What is the second thread on the crank for?
The problem is almost certainly that the crank arm came loose and was allowed to stay that way while the bike was ridden. Once a crank arm is loose it only takes a small amount of riding to cause the socket in the arm to be deformed such that it no longer tightly fits on the shaft. Sometimes a skilled and creative bike mechanic can supply a "fix", but most likely your arm needs replacing.
2d
comment What is the second thread on the crank for?
(And if the crank arm comes off without resorting to a puller it usually means that the arm (and possibly shaft) is toast.)
2d
comment What is the second thread on the crank for?
The threads are for a crank puller. They also incidentally hold the screw-on caps that cover the openings.
2d
comment How does the risk of a cyclist colliding with a vehicle vary with the speed difference?
@Michael - It should be noted that a substantial fraction of car-bicycle collisions (perhaps half) are technically the fault of the cyclist. And a substantial fraction of serious bicycle injuries (again, I'm recalling that it's about half) don't involve an automobile at all.
2d
comment What exactly are Quest bikes?
There are likely thousands of bike "brands" that have been use over the years. Especially with the Chinese churning out cheap bikes like they are there's a need by the manufacturers to change brand names frequently so that a poor quality reputation doesn't build up. Don't know about "Quest" in particular, but many brands like this are only sold for a year or two, then they quietly go away.
2d
comment How does the risk of a cyclist colliding with a vehicle vary with the speed difference?
More relevant is this answer: bicycles.stackexchange.com/a/9035/1584
2d
comment How does the risk of a cyclist colliding with a vehicle vary with the speed difference?
Your two quotes are addressing different things. Obviously an accident, when it happens, is more likely to produce serious injuries if the closing speed is greater. This is (mostly) unrelated to the probability of the collision in the first place.