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8h
comment Are folding handlebars a good idea from an engineering standpoint?
If one hinge pin fails the bar would still be restrained, to a degree, by the brake cable. Whether the failure would be recoverable depends on how quickly the cyclist can/does react. But the bar failing at the pivot would be more likely, and harder to recover from.
1d
comment Are folding handlebars a good idea from an engineering standpoint?
Note that the two "castings" need to somehow clamp the ends of that center stub. It's not clear how that works.
1d
comment Are folding handlebars a good idea from an engineering standpoint?
The center locking nut very much resembles an S&S connector of the sort often used to hold together touring bikes. These have been in use for probably 50 years and are highly respected.
1d
comment Are folding handlebars a good idea from an engineering standpoint?
Another potential point of failure is where the handlebar is drilled through for the pivot bolts. This would put substantial stress on the bar tube and the tube could crack and fail at that point. But the design, with the threaded connector solidly binding together the two halves, should minimize stress at this point, of the materials are properly chosen and the manufacturing process is appropriate.
1d
comment Are folding handlebars a good idea from an engineering standpoint?
I've seen worse ideas. The plastic hinge blocks would appear to be the weakest link -- they could disintegrate or the connection with the center part could suddenly twist. The threaded connection between the two halves of the handlebar should be about as good as a S+S frame connector for folding bikes, though. (That is, pretty good.) But of course one would need to use care when securing the nut.
1d
comment Can you have too many in line barrel adjusters?
Each adjuster has a certain amount of "slop", and it would begin to add up. But three is probably OK -- I'd be concerned with 5 or 6.
2d
comment Presta valve on new tube won't inflate
You should always slightly inflate a tube before inserting it into a tire. This helps assure that it doesn't get twisted or pinched during installation.
2d
answered Chain going “slack” on the 7th gear under load on a new mountain bike?
Feb
4
comment Crank arms are not parallel to each other. What could have caused this?
As Mike Baranczak says in his answer, one of the cotters is in backwards.
Feb
4
comment Why are post ~'80s bike finishes so “dull”?
Bike finishes have roughly paralleled automobile finishes. Originally an old-fashioned lacquer was used, then various other technologies. The colors are a separate matter -- some colors work better with some technologies, but ultimately the color chosen is what the manufacturer thinks will sell, and gaudy colors are usually preferred of late.
Feb
4
comment Can somebody identify my bike for me?
No, a mountain bike should roll about as well as any other, aside from the drag due to the lugged tires. The front shock (if not "locked") does make pedaling somewhat less efficient, but that has no effect on how well the bike rolls.
Feb
4
comment Can somebody identify my bike for me?
If it stops moving when you stop pedaling something's dragging. Could just be underinflated tires, or could be brakes or something else. (Plus of course lugged tires are not the best idea on the road.) The only thing that makes it not a passable road bike is the shock fork, and that can be locked out, by hook or by crook.
Feb
4
comment Crank arms are not parallel to each other. What could have caused this?
This is the right answer, except that "tap the pin out" is a pipe-dream.
Feb
4
comment Can somebody identify my bike for me?
Not necessarily a BSO, but it's pretty generic, and nothing screams "expensive". Looks like a perfectly serviceable bike, though.
Feb
3
comment I have an older Novara bike wth 26 x 1 1/4 x 1 3/4 tires. Any tires out there with a full whitewall?
@Emyr - And which is larger, a 29 inch tire or a 27 inch tire?
Feb
3
comment What are the advantages of 4 arm cranks for road bikes?
Note that an ounce is about 28.3 grams. If the crank saves 42 grams that's about 1.5 oz -- the weight of a small candy bar.
Feb
3
comment Presta valve on new tube won't inflate
It's unclear what you're describing. If you hear air going into the tire as you pump, and it does not come whooshing out when you pull the chuck off, then presumably the pump is OK. (Hardly any pumps depend on the Presta valve to prevent air from flowing back into the pump anymore.) Did you perhaps hole the tube while installing it??
Feb
3
comment I have an older Novara bike wth 26 x 1 1/4 x 1 3/4 tires. Any tires out there with a full whitewall?
If the ISO is 32-622 then it is not a 26" bike. It is a "700c" bike (or what is now sometimes bizarrely called a "29 inch" bike).
Feb
3
comment I have an older Novara bike wth 26 x 1 1/4 x 1 3/4 tires. Any tires out there with a full whitewall?
Why are you recommending a 700c tire on a 26" bike?
Feb
2
comment durablity and brand?
@Mσᶎ - Yep, right around 5 years ago disk brake prices dropped rather quickly, when they began to become OE on some midrange models. And, of course, "expensive" is relative. I would consider an option that adds $500 to the price of bike to be "expensive". Others might not.