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location Minnesota, USA
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visits member for 3 years, 10 months
seen 6 hours ago

Old, tired, crazy.


19h
comment Reason for handlebar diameter
@ChrisH - There is no real "standard" for handlebar diameter. Some sizes are, I suppose, "habitual" (and "blessed" by ISO), but new sizes are introduced at the whim of the manufacturers. The fact that there's not a wider variety of sizes is mostly due to the fact that there's no compelling "story" for new ones.
20h
comment Reason for handlebar diameter
You do have a point, in that the weight of your body on the handlebar causes pain due to poor blood circulation and pressure on the nerves. However, I once calculated that the bar would need to be 3-4 inches in diameter to totally alleviate this issue. The better way to alleviate pain is to change hand positions frequently and/or have ribbed handlebar covers. There is no great need to grip the handlebar tightly -- there is no significant torque at the grip, unlike a racket.
1d
comment Hydraulic disc brakes - total friction as a function of rotor size
@ebrohman - For most materials, in the "medium" range of operation (where brakes would likely be operating), the "coefficient of friction" is a near-constant, meaning that sliding friction is directly proportional to caliper pressure.
2d
comment Hydraulic disc brakes - total friction as a function of rotor size
@ebrohman - You can roughly assume that, above maybe 30% brake force, the force on the lever is proportional to the torque on the wheel.
2d
comment What's causing this puncture?
(There is a slight chance that you could be damaging the tube while installing it, but generally such damage would be on the side of the tube and there would be a visible mark on the tire.)
2d
comment What's causing this puncture?
Remove the tire and tube completely, then check the inside of the tire and the perimeter of the rim for any foreign objects. Next, make sure that the rim strip, covering the spoke ends, is intact, and that no spoke ends are poking through it. And replace the tube.
2d
answered Hydraulic disc brakes - total friction as a function of rotor size
2d
comment Does anybody use saddle bags for touring?
That's fine for supported touring (in fact, more than you absolutely need), but likely insufficient for unsupported touring, unless you sleep in a bivy sack.
2d
comment Can I change from short to long derailleur to increase cog size
The difference between a short arm derailer and a long arm one is the "tooth capacity" -- the difference in chain length between the small-small sprocket combo and the big-big one.
2d
comment Is this a clipless pedal?
I'd say it's pretty normal size for a platform pedal.
2d
comment Do I have to stop pedaling when shifting up the front chainring?
It should be noted that many 3x fronts have a facility to allow "fine tuning" the derailer (mainly when on the middle sprocket) by making partial clicks with the shifter.
2d
comment Do I have to stop pedaling when shifting up the front chainring?
You should continue pedaling but ease up on the force.
Apr
16
comment inner tube to fit in a 26 X 1.5 bicycle tire
(As to Schrader vs Presta valves, it would be rare for a standard bike with a 26 x 1.5 wheel to take a Presta valve. Presta valves are usually only seen on fancier bikes.)
Apr
16
comment inner tube to fit in a 26 X 1.5 bicycle tire
Read what it says on the box. The boxes are usually pretty good about stating what sizes they fit. 26 x 1.5 is a pretty common size.
Apr
15
comment When you're stopping at an intersection
It depends a lot on how powerful and aggressive a cyclist you are. I kind of like to hang back and let the cars go first.
Apr
15
comment Where does aero wheels noise come from?
It comes from his head. If it were the mark of a cheap wheel it would sound annoying.
Apr
15
comment Should I switch to a 13-23T or 12-25T cassette?
You should always put a new chain on when switching cassettes, if the old one has more than maybe 500 miles on it, since the chain and sprockets wear together and the old chain would not properly fit a new cassette.
Apr
15
comment Kashima coat or not?
I would guess you'd have to buy a new fork.
Apr
15
comment How to check if the gear shifter or the gear itself is broken?
I would observe that, based on the condition of the chain and other visible steel parts, the shift cable is likely rusted up.
Apr
14
comment Crank fell off square taper BB. Should I replace bottom bracket
@whatsisname - OK, good to know.