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13295
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location Minnesota, USA
age
visits member for 3 years, 10 months
seen 11 mins ago

Old, tired, crazy.


15m
comment Why is my electric bike 'clanking' under load?
It's not too uncommon for a slightly loose bottom bracket cartridge to slip back and forth as you crank and make such noises. Generally the cartridge it not loose enough that it feels loose on casual examination. But I would be most suspicious of that torque thingie.
18m
comment Pedal snaps at every rotation
First make sure it's the pedal and not the crank arm. If the crank arm is loose that's an emergency and it needs to be tightened immediately (if not sooner). But if the "snap" is definitely coming from the pedal then the bearings are somehow mucked up. A few pedal designs allow you to rebuild the bearings, but in most cases you must (eventually) replace them. But it's no hurry -- the pedal will likely fail eventually, but probably not for hundreds of miles.
24m
comment Bike Shorts, Do you wear things under/over them?
In my younger days I rode 80-100 miles/day in plain old lined jogging shorts (which used to really be shorts, before "baggies" became popular). However, I now need every advantage I can get, so I wear the spandex shorts (with nothing under them).
14h
comment DIY: what material to use as DIY shim seat post?
@andy256 - Well, one presumes that he'd put a seat on top of it. But there's no need for the "ears" to be that long -- 1/4 inch is plenty.
1d
comment Is it practical to wear motorcycle half helmet for road cycling?
What the others said, plus your posture on a bike is usually different than on a motorcycle -- you tend to lean forward more. The helmet's visor will likely obstruct your vision to an unacceptable degree. (And I can't imagine wearing that on even a halfway warm day, as poorly ventilated as it is.)
2d
comment Does anybody use saddle bags for touring?
Just for the record, a proper rear rack and panniers will distribute weight better than either/both your backpack or saddle bag. And the rack/panniers do not cause an increased risk of broken spokes.
2d
comment Right fork mounting point
Yeah, probably for a light. Which would suggest that the bike started life as a tourer.
Apr
18
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.
Apr
18
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.
Apr
17
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.
Apr
17
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.
Apr
17
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.)
Apr
17
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.
Apr
17
answered Hydraulic disc brakes - total friction as a function of rotor size
Apr
17
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.
Apr
17
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.
Apr
16
comment Is this a clipless pedal?
I'd say it's pretty normal size for a platform pedal.
Apr
16
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.
Apr
16
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.)