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Jun
24
comment How to decrease belly fat while cycling?
The self discipline problem can be helped by eating the right stuff. A can of Coke and a bowl of Oatmeal contain the same number of calories, but the bowl of oatmeal won't have you feeling hungry again in half an hour. Try to stay away from high calorie drinks altogether because most people don't actually adjust their food intake when drinking them. If you have a can of Coke with lunch, you should really be eating 140 less calories with your lunch, which most people don't do.
Jun
22
comment Rear derailleur mess up PLEASE HELP. Im helping a 64 year old cancer patient. Very important
Check if there is a bicycle co-op in your city. They often have tools you can borrow for free, or a very small price. If you explain your situation to them, I'm sure they wouldn't mind letting you use the tools for free. Also, they often have people that can help you fix problems. Otherwise, look for free repair clinics put on by community groups. I know there's a few that happen in my city at various times throughout the summer.
Jun
22
comment Bike for college campus
Some campuses are starting to catch on. My Alma Mater has a caged bike area with cameras that logs who goes in and out with a swipe card system. Bicycles are a very economical means of transportation. It's disappointing that the lack of security on campus stops most students from being able to use bicycles.
Jun
22
comment Chain falls to the outside of the chainring, but I can't reproduce the problem
It's actually quite common that you can't reproduce certain problems with the bike on the stand. The should should take the bike out for a test ride or put it on a trainer (might be difficult with a folding bike) in order to get a better idea of what's happening with the bike. The frame flex (especially on folding bikes), and other parts can move in ways which don't happen when there is no load on the components
Jun
19
comment Where can I find the maps my Garmin Edge 305 made?
This says something about .tcx files. Perhaps try doing a search for those. If you used Garmin Training Center it probably used those files. Looks like Strava can support those files directly.
Jun
19
comment '1 1/8' vs '1/2 1/8' chain/chainring
I think the reason for 1/2 inch vs 1 inch is that some manufacturers measure the distance pin to pin, while others measure the length of and entire link which includes the inner and outer plates, and consists of the distance between 2 sets of pins.
Jun
19
comment Mountain bike sizes
@Batman. I think that's why many manufacturers have opted for 27.5 inch wheels on the smaller sizes. OP doesn't say how big he is, so it's kind of hard to answer the question. Even 24 inch kids bikes have an effective top tube of 52.9 and a reach of 37.3. Which is bit bigger than the adult bike I linked to.
Jun
19
comment How can I increase my speed on my hybrid bike?
I agree with the shoes. Not only do they help with power transfer, they make it a lot easier to maintain high cadences, because you don't have to worry about your foot slipping off the pedal. Even if you only have a 44x14 maximum gear, you can still maintain 40 km/h at 100 RPM (as per Sheldon Brown Gear calculator). If you have a 48x12 you could maintain 51 km/h at that cadence.
Jun
18
comment Trek 620 Front Fender
If you can't find something to work, there are options if you want to modify fernders
Jun
17
comment Finding a single speed kit for an old campagnolo from 1997 with screw on freehub
If you are going to end up replacing the free hub, it's probably easier to just replace back wheel with a proper single-speed/fixed hub and then you don't have to worry about using a conversion kit.
Jun
17
comment Is it worth buying a RFLKT+ or is the RFLKT good enough?
@CareyGregory I said I have an altimeter built into my GPS. Also, it's worth mentioning that barometric sensors aren't without their own problems. Since they rely on atmospheric pressure to calculate altitude, weather condtions such as storm can throw them off. A change in pressure of 5 mbar can result in a skewed reading of 40 meters. Even without storms, the pressure can easily change by 1 mbar, resulting in readings being off by 8 meters. They are great in showing change in altitude over a relatively short time, for individual climbs, but probably shouldn't be trusted as always correct.
Jun
17
comment Is it worth buying a RFLKT+ or is the RFLKT good enough?
From what I read, you only need the ANT+ bridge if you intend to use it with an iPhone or other phone that doesn't support ANT+. If you have an Android phone that supports ANT+ (not all of them do), then you can use the ANT+ features of the phone directly, and you don't have to get the RFLKT+. The only advantage left over is the altimeter, which like you say, can be somewhat useful in climbing. I have an altimeter built into my GPS, and find it surprisingly accurate. The reading will go up or down by 1m increments as I lift or lower it in my hand. No idea with how accurate the RFLKT+ is.
Jun
16
comment Is a long, high angle stem safe to use with a carbon steerer?
I agree with @Super. Although 120mm is on the longer end of commonly available stems, the fact that it will make you much less hunched over the bars means that you'll probably have less force on the steerer than you would in the original configuration. Also, the "normal force" would probably be about the same because of the large angle.
Jun
13
comment How to carry Xtracycle by car?
Where there's a will, there's a way
Jun
11
comment Is any major manufacturer working on a 12 speed group?
I think the range is the main point. Road bikes currently have almost all the range they need with 11 speeds and a double crank. They also have the gears spaced quite closely together. Mountain bikes are a different story, as they often need a much larger range than road bikes. In this case, there could be a real advantage from more gears allowing smaller spacing between the gears, making them more similar to road bikes.
Jun
11
comment bicycle pedal design specifications for threads
@Blam Read the part in the link about "precession". The purpose of the reverse threading is to prevent the pedal from coming loose. This was an actual problem people had way back before they started using reverse threads. The pedal bearings would have to be beyond messed up for the bearings to lock up enough to cause it to unscrew. I don't think I've ever seen bearings that bad. Most pedals would have been replaced well before then.
Jun
10
comment Validity of UCI motor concerns
You can still go pretty fast even if you keep the cadence below 90 RPM, provided you are in the correct gear. This could be very useful when doing things such as climbing. It probably wouldn't help much in the final sprint where they are spinning in the top gear at high cadences. Also, the Vivax assist is probably optimized for 90 RPM and below, because that's how people will use it, but they could probably also design one that would work at 100 or 120 RPM if that was the design goal.
Jun
10
comment Validity of UCI motor concerns
I think for "mechanical doping", they'd be looking for devices such as the Vivax Assist. Which can be concealed in the seat tube, rather than quite visible hub motors. Most e-Bike motors are purposely limited to lower speeds to increase safety, but I'm sure a motor could be designed that would help a professional rider if that was the goal.
Jun
10
comment bicycle pedal design specifications for threads
@Batman I think you're right. Now that I think of it, even the lower end bikes that I've seen recently seem to have 9/16" inch pedal threads. Perhaps I'll check the pedals on my kids' bikes and get back to you on that. I was kind of just going from the information on Sheldon's site, which can (understandably) be a little dated in some areas. Also, Sheldon mentioned the now defunct "Dyna Drive" system which used must larger thread I think if you're designing a pedal or crank arm, you would pretty much cover the entire market by just going with 9/16".
Jun
10
comment Why exactly did Boardman manage a further distance than Wiggins?
I guess it depends on your flexibility. Every time I try getting really low like that, I find it helps me go faster, but my legs tire out really fast. I think this position forces you to use your muscles differently,