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location Minnesota, USA
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visits member for 3 years, 8 months
seen 5 hours ago

Old, tired, crazy.


Jan
3
comment How to find compatible cranks?
The critical features are 1) the sort of connection between crank arm and crank shaft, 2) the length of the arm (though this can be changed if you wish), and 3) how the chainrings mount. Hard to be sure from the picture, but it appears that your chainrings are riveted to the crank, meaning they must be replaced as a set.
Jan
3
comment How does a bicycle tyre and wheel affect its performace and speed?
@munish - I have no real feel for how high you can "safely" go with tire pressure. I'm comfortable with 100psi in my 35s, but would be a bit nervous about going higher. And a lot depends both on the quality of the tire and the nature of the roadways.
Jan
2
comment Crank threads stripped - both pedals fell off
(And be careful when installing the pedals after repairing/replacing the cranks. A burr formed on the pedal from the prior stupidity can easily spoil the new threads.)
Jan
2
comment Crank threads stripped - both pedals fell off
They were either cross-threaded or threaded into the wrong side. It's amazingly easy to drive a steel thread (especially the "rolled" threads of a pedal) into aluminum at the wrong angle or even the wrong direction. There is resistance, but it doesn't get harder as you go, making the "mechanic" think he's "making progress". Unfortunately, after two years convincing Halfords that it's their fault will be difficult, but it's worth a try.
Jan
2
comment Crank threads stripped - both pedals fell off
Odds are that whoever assembled the bike at Halfords put (ie, forced) the left pedal in the right crank and vice-versa. (Although, looking at the pictures, the left-hand pedals does have a left-hand thread, as it should.) You need to either replace the crank arms or have a machine shop install "helicoils".
Jan
1
comment Is there a guide available for determining pedal/cleat combinations?
Just off the top of my head, the other halfway-common styles are the Shimano SPD-SL (much larger cleat, for road bikes), the Look plate pedals, and the Crank Brothers "eggbeaters".
Jan
1
comment Is there a guide available for determining pedal/cleat combinations?
Yeah, Shimano "mountain" SPD. Probably the most popular style for non-racing bikes. There are several different pedal designs that all use that same cleat, and the shoes fitted for them are mostly interchangeable.
Jan
1
comment How does a bicycle tyre and wheel affect its performace and speed?
Ignore the aerodynamic issue -- the effect is negligible unless you're racing. Up to a point, increasing pressure lowers rolling resistance, but again, if you're above about 80psi on a 38mm tire increasing pressure will have negligible effect. Whether increasing tire width beyond 30mm or so will reduce rolling resistance is hard to say -- there are competing factors involved. What does have an effect is the tread of the tire -- for low rolling resistance you want a nearly treadless tire.
Dec
31
comment best ride to burn tummy fat
Part of the equation is that the liver needs to be "challenged" to kick up its rate of fat breakdown (basically grow more fat-burning tissue). This contributes to "increasing the metabolism".
Dec
31
comment Why does my front derailleur not work when it is cold?
This is common with Shimano brifters. The lube in the unit gets gummy, and worse at low temps (though eventually it will fail at "normal" temps). This prevents the pawl of the ratchet mechanism from latching (though it will sometimes work if you operate the lever very slowly). A few well-aimed shots of a spray lube will generally clear it up, but it may take 2-3 tries.
Dec
31
comment best ride to burn tummy fat
There is some distinction between "brown fat" and regular body fat, as to what causes the body to "burn" them. And to some degree the body "prefers" to lay down one or the other in certain areas. (I'm thinking that brown is more likely to occur in the tummy area than elsewhere, but don't quote me on that.) But there's very little research/evidence to support special techniques for burning one form of fat vs the other.
Dec
31
comment best ride to burn tummy fat
Short hard rides burn blood sugar and glycogen, not body fat.
Dec
30
comment Chain is choking and pedals fly forwards when going up hill or standing on the bike pedals
How many miles on the bike? One first suspects worn cogs, but that would only happen with 2-3 thousand miles wear. Also, a too-long chain is suspect, as is a faulty derailer (lacking spring tension) or simply poor derailer adjustment. Or maybe a bent derailer hanger.
Dec
30
comment best ride to burn tummy fat
Basically, you need long durations (at least 30 minutes, preferably an hour or two) to burn fat. You must cause the body to use up it's readily available blood sugar (and whatever remains in the gut from your last meal) and start converting fat to sugar in the liver. Prolonged high intensity is probably not good as that drains muscle glycogen rather than calling on the liver, but it's not a bad idea to "mix it up" a bit.
Dec
29
comment How do I know what is the right bottom bracket for my old road bike?
Looking at that picture, I don't see a problem.
Dec
29
comment Bike computer wheel size setup
And it makes no difference how far out along the spoke you place the magnet and pickup, so long as it's reliably mounted. The computer measures rotations.
Dec
29
comment Bike computer wheel size setup
Yep, measure how far the bike travels in one revolution of the wheel. Even if there is no table in the manual, it's a simple math calculation to convert wheel circumference into wheel diameter, and you'll be a lot more accurate than feeding in a wheel size. (And some computers let you feed in circumference directly.)
Dec
28
comment What Type of Brake Pads Should I Look For?
I think your best bet is to go to a physical bike shop. Brake pads differ in post style, length, and the hardness of the pad material, and you pretty much need to touch them to see which suits your needs.
Dec
24
answered sealed hubs vs normal hubs
Dec
24
comment Axle to wheel bore ratio?
Yeah, you want the fit to be as close as possible without being tight. Sometimes you can use a bushing of copper pipe, sometimes you can find a suitable bushing in a hardware store.