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Jun
24
comment How often should one service headset bearings?
It should be noted headset bearings -- at least the old "threaded" style -- can come completely apart (all the balls fall out) without severely impairing the handling of the bike (though certainly this condition would drive a "bike nut" crazy). I've seen many bikes -- still being ridden -- with severely loose headsets. (Dunno what would happen with "threadless" units in a similar situation, though.)
Jun
24
comment Tube sealant vs. tire liners vs. puncture-resistant tires — which best prevents flats?
I've only ever had one puncture in my Forte Metro-K tires (Kevlar belted), in about 3000 miles of riding, and that was when the tire was nearly worn out. Prior to switching from standard tires I got about one puncture every 200 miles.
Jun
24
comment Why are foot-long pedals not widely used?
With the foot off the pedal, the pedal would strike the ground and cause a spill. Probably about six inches is the longest practical pedal on a standard upright bike.
Jun
23
comment Is graphite grease suitable for bicycle bearings?
As it says, it's intended for lubricating sliding parts. Not ideal for ball bearings.
Jun
22
comment Rekey a Kryptonite lock outside North America
Ask a locksmith.
Jun
22
comment Twist shifter cannot shift down – what might be the cause?
@ChrisinAK - When they work they work. When they stop working (which is frequent) they're trash.
Jun
22
comment Symptoms of handlebars that are too narrow? Triceps pain?
It seems highly unlikely that a 2cm change in width is apt to cause such distinct and rapid symptom. More likely the curve of the bar is different, or you have the brake levers positioned differently from the old bar.
Jun
22
comment Twist shifter cannot shift down – what might be the cause?
Twist shifters don't contain grease that can harden and make things stick.
Jun
22
comment How to deal with motorist's road rage (after prevention has failed)
I mean once he's started shouting at you, pull off onto the sidewalk and stop, or pull down a side street or whatever. Disconnect.
Jun
22
comment How often should one service headset bearings?
Every 30 years, whether they need it or not.
Jun
22
comment Twist shifter cannot shift down – what might be the cause?
From my work reconditioning used bikes for charity, I know that twist shifters are just about the least reliable part of a bike. They have several failure modes, but the most common is for the detent spring (a little strip of oddly bent metal) inside to bend or dislocate. Sometimes the spring just falls out.
Jun
21
comment How to deal with motorist's road rage (after prevention has failed)
Just get out of his way. You know you can't reason with the guy, so don't bother trying.
Jun
21
comment Knee position while on the aero bar
Go to Google Images and type "cyclists".
Jun
21
comment Is 32km possible to ride with my body condition?
32km is 20 miles -- 10 miles out and 10 back. This is about the distance I traveled (on rural/suburban roads with moderate traffic) when I first started commuting. The first 3-4 times I made it to work OK but was so sore and tired I had my wife come and haul me home. After that I was able to do the round trip most days (though only every 2-3 days to start). I've never been the picture of health.
Jun
21
comment Tire Continually going flat
You may indeed be holing the tube while installing it. This is especially likely if you're using screwdrivers to mount the tire.
Jun
21
comment I can remove crank arms without a crank puller, is this a problem? I'm worried the crankarms might be loose
@mikes - Good point. If the shaft end is projecting out of the front of the crank then grinding the back of the crank will do no good. In such a case the crank arn is likely toasted, though OverOver's shim idea is maybe worth a try.
Jun
21
comment Rear derailleur mess up PLEASE HELP. Im helping a 64 year old cancer patient. Very important
Kind of hard to guess how he got it "knotted up". I'd suggest you find another derailleur-style bike with similar components and set them side-by side so you can understand what's twisted how. Or some pictures would be helpful, if you have a digital camera.
Jun
21
comment Chain length and cassette tooth count relationship
If you understand that you cannot use the full (and somewhat illogical) range of gear options, you can use a chain that is longer or shorter than the "perfect" length. This does require a bit of care, as the chain can jam if stretched too tight, or may come off if made too loose. But in your case is makes sense.
Jun
20
comment Electronic bike keeps getting flat tire on the back
Yeah, unless you find a cause (spoke end, wire sticking through tire, pressure too low, etc) I'd recommend you get a belted tire.
Jun
20
comment Time to replace chainring?
Yeah, get yourself a chain stretch gauge. And good bike shops will have wear gauge for the chainrings and should be able to check them for you. (Usually the middle ring is the first to wear out, and no need to replace the entire cranskset unless you have a really cheap set.)