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Jun
11
comment Can't downshift rear derailer
Generally one of three problems: 1) The cable has seized up. 2) The cable has stretched and needs to be tightened. 3) The crappy twist shifter has bit the dust.
Jun
11
comment Flat tire keeps occurring while bike is stationary. MYSTERY
Of course, if the tire was pumped up 2 weeks ago the pressure is likely below 50. But one would expect it to need to fall below about 30 for the valve to tear from twisting while riding.
Jun
9
comment back tire keeps going down
Uh, isn't the whole point of a tube for it to be between the tire and the rim?
Jun
9
comment How can I tell where the damage is in the hub?
Kinda sounds like your rear axle broke.
Jun
9
comment back tire keeps going down
There are many ways to damage a tube while installing it. Most common is probably to puncture it with screwdrivers being used for tire levers.
Jun
9
comment back tire keeps going down
"just make sure that when you are installing the tyre the tube isn't between your tube and the rim!" ???
Jun
8
comment Presta valve won't let air in on a new tube
You don't have the "nobbie" (technical term) unscrewed all the way. With it unscrewed, when you push the pin in, does air come out?
Jun
8
comment Buying Brakes for custom kick scooter with 12" diameter bmx wheels
I've only seen one scooter of approximately this description, and it had drum brakes.
Jun
7
comment back tire keeps going down
Since you're unfamiliar with bikes, it's entirely possible that you're doing something wrong when you change the tube. You may, eg, be damaging the tube as you install it. I'd suggest you have the tire fixed at a bike shop, and have them tell you what's wrong with it, and whether you might have caused the problem.
Jun
7
comment When to replace wheel bearings
It's unclear what you mean by "one bearing". If, within a single bearing assembly, there is one ball that appears pitted, all balls should be replaced. You should never (except in emergency situations) replace some of the balls in a bearing and not others. But if, say, the front hub bearings have gone bad and the hub needs replacing, that says nothing about the condition of the rear hub or other bearings on the bike.
Jun
6
comment 3 Speed Front Derailleur can't reach small gear
The BB does not have enough offset.
Jun
6
comment how to choose inner tubes
Using a tube that's too narrow can cause the tube to "telescope" as it inflates, leading to early failure. Or the wheel may develop a lump near the valve.
Jun
6
comment Electric Bike (eBike): Freewheel or Regenerative braking?
In theory the controls could be designed such that regen only occurs during braking, and there would be no trade-off necessary. Some bikes may actually do that (perhaps called "active regeneration" or some such), but I'm not familiar with the details of what's on the market now.
Jun
6
comment Retrieving Loose Nipple from Inside Rim
I think you are unfamiliar with the construction of the typical double-walled rim.
Jun
5
comment Why don't road bikes use v-brakes?
Of course, there is no inherent difference between cantis and V-brakes -- they work exactly the same. It's just that Shimano released V-brakes with a mechanical advantage setup that has less modulation (and hence more "grab"), presumably to sell to off-roaders. It would be nice if they produced levers with different geometry, to reduce grab for on-road (who needs to skid a road bike?) but they don't.
Jun
4
comment Should disc brake rotors be removed when packing bike for travel?
More important than removing the rotors is to place a dummy axle between the dropouts (assuming the wheel is removed). Also, unbolt the rear derailer and tape it loosely to the chain stay.
Jun
4
comment Rear wheel rubs frame/cage while pedaling standing up
Note that tire width does not take into account however much the tread may stick out. If you have oversized tires with heavily lugged treads then that's likely your problem.
Jun
4
comment Rear wheel rubs frame/cage while pedaling standing up
Oh, I see. The wheel is likely not mounted straight, or you could have loose wheel bearings. Or the tires are simply too wide for the bike.
Jun
4
comment 22 to 11 speed conversion?
Because you said so. ;)
Jun
4
comment How is Sir Bradley Wiggins 3D printing his titanium handlebars?
It's a process which involves the application of a lot of money.