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location Minnesota, USA
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visits member for 3 years, 1 month
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Old, tired, crazy.


Jul
22
comment How to inflate a tire with a Presta valve?
There is no need to depress the stem in a Presta valve, since air pressure will open the valve when the pump develops more pressure than is inside the tire. All that's necessary is to briefly tap the stem before putting on the chuck, to make sure that the rubber gasket is not stuck closed.
Jul
22
comment How to inflate a tire with a Presta valve?
The purpose of the threaded stem and nut is to hold the stem out so you don't have to do the thumb thing.
Jul
22
comment Solid rubber bicycle tires
Also note that there are several different technologies that produce tires that are far less prone to puncture (like 10x to 100x less) than are the standard tires that came with your bike.
Jul
21
comment What's the lowest safe cadence on a climb?
I don't have the physiological data/knowledge to figure this out. One problem is that, even with good seat height, the knee is bent at a fairly sharp angle when the maximal force is applied, whereas when walking/running (the most-studied activities) the knee is at a much shallower angle. I did find this, though I didn't attempt to digest it: physicaltherapyjournal.com/content/67/9/1365.full.pdf
Jul
21
comment What's the lowest safe cadence on a climb?
When you're doing that wattage on the flat you're applying a much lower force to your knees. Wattage = force times RPM.
Jul
21
comment Mystery item broken on old Dawes. Help!
Ah, yes, it's a simple cable clamp. A good bike shop will probably be able to scavenge one from their spare parts box and should give it to you for free or a modest price.
Jul
21
comment Specific Conversion to IGH
You need to replace the rear wheel because the hub will go into the rear wheel, and rebuilding your existing wheel (with new, different-length spokes) would be more expensive than a whole new wheel.
Jul
21
comment What's the lowest safe cadence on a climb?
@sjakubowski - As others have indicated, it's not simply cadence that is the issue, but rather the maximum force applied. It's just that at higher cadence your aerobic capacity (usually) limits you before you can cause injury. But you might want to consider my rule of thumb which is to never sustain (for more than say 5 minutes) a cadence that is slower than your respiration rate. This seems to fit a wide variety of circumstances pretty well.
Jul
21
answered How can I tell if I have properly patched a tube? (specifically a 2" mt. bike tube)
Jul
21
answered What's the lowest safe cadence on a climb?
Jul
21
awarded  Nice Answer
Jul
21
comment What's the lowest safe cadence on a climb?
Of course, if you had a lower gear ratio then you would be able to maintain the same speed at a higher RPM. But my impression is that the concern about low cadence (with high effort) is more about sustained riding vs relatively short intervals. How long did it take you to do the climb?
Jul
20
comment Brake Cable Ends - Barrel and Pear Nipples
@PeteH - Be thankful there's not 12 different types. (In fact, don't talk to loud or Shimano will decree that all cables have to use a new style end.)
Jul
20
comment Brake Cable Ends - Barrel and Pear Nipples
The barrel end has the advantage of being able to pivot in a U-shaped notch in the brake lever. Other shapes are used where this "advantage" is not of any utility. Typically brake cables will be delivered with different style "ends" on both ends, and you cut off the one you don't want.
Jul
20
comment Reducing Bulk on a touring trip
@jon - You can no doubt find the space in your bags to carry an additional 10 pounds of lead (if you should want to for some strange reason), but can you find the space to carry 10 pounds of Styrofoam? There's a practical limit to how much volume (cubic inches) you can somehow strap onto a bike. You usually reach that limit well before the bike gets too heavy to ride.
Jul
20
comment The Value of a Chair on a Touring Trip
(And there's also the question of whether you'll even be able to find the thing in your bags when you want it.)
Jul
20
comment The Value of a Chair on a Touring Trip
@jon - I mean cubic inches (or cubic cm, if you prefer). One of the biggest challenges of self-contained touring is getting everything to physically fit on the bike.
Jul
19
comment The Value of a Chair on a Touring Trip
You fail to say whether this is a self-contained trip or your baggage will be hauled for you. When running self-contained the bulk is probably even more of a factor than the weight.
Jul
19
comment Lots of broken spokes on one bike, with different wheels
One assumes that you would have said by now if this is a disk brake wheel vs rim brakes.
Jul
19
comment Can I use cartridge bearings on my wheel hub?
@armb - Seriously, you've never replaced the balls in a race with a new set and seen how they fit noticeably tighter?? If you've got 11 balls in a race that's 22 surfaces that can wear, plus the race itself. Multiply a tiny bit of wear by 22 times and it can easily add up to that half a ball. And the race itself does wear as well. The beauty of ball bearings is that they wear very evenly, so they can take quite a bit of wear without looking (or acting) worn.