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2
votes
2answers
556 views

How do you estimate the speed of Tour de France riders on tv?

I was watching Tour de France with my father (who is a cat 3 racer), and he claimed to be able to estimate how fast the riders were going by observing the cyclist on the screen. I didn't believe him ...
2
votes
3answers
997 views

Bike Speedometer Accuracy [duplicate]

What factors should one look for when purchasing a speedometer? Does wired vs wireless or anything else factor into its accuracy?
2
votes
2answers
150 views

Switching to touring bicycle: Performance considerations

I'm using a road bike more than 2 years for holiday tours and commuting. Merida Scultura 903 Shimano Tiagra groupset (50-34, 12-28) 8-9 kg 700x23 tyres Now i have plans to switch to touring ...
2
votes
1answer
2k views

How do I choose a light GPS device supporting Strava? [closed]

Up til now I have ridden with Strava running on my mobile phone sitting in a special mobile phone holder which sits up on my handlebars. Now I am looking for a better solution, both more aerodynamic ...
1
vote
3answers
177 views

Is it better fitness-wise to ride at the maximum gear?

I just wanted to know if I will be doing more effort while riding at the maximum gear all the time, rather than changing gears constantly. My commute is an hour long, but I want it to be tougher on ...
1
vote
2answers
531 views

If not Kona Asphalt Commuter then what?

Recetly I spotted Kona Asphalt Commuter, one of this series here: http://www.konaworld.com/asphalt_commuter.cfm?content=dew_plus Why such bike is so special for me -- because right from the shop I ...
1
vote
1answer
131 views

How can one estimate the length of a commute? [duplicate]

How can a cyclist, new to commuting by bike and not all that experienced in riding, estimate how long a commute will take? Answers will of course vary, and actually riding the commute will tell the ...
1
vote
2answers
787 views

What is the relationship between tyre pressure and weight?

To give an example of what I'm trying to understand: To accelerate to a given speed or maintain that speed with a tyre pressure of e.g. 100PSI requires a certain amount of energy. If that amount of ...
1
vote
3answers
593 views

Multiple Bluetooth Smart sensors for bike?

I just bought a Sports Tracker Smart heart rate monitor that communicates via Bluetooth. Then I saw the cadence sensor that also measures speed and distance plus it communicates with Bluetooth Smart. ...
1
vote
2answers
523 views

Campagnolo Athena 9 speed compatibility?

I own some NOS shifters, Campy Athena 9 speed, from 1998 i guess. do you guys know if I can use it with any campagnolo front/rear derailleur? how do I know what is compatible?
0
votes
2answers
370 views

Is there any bicycle that can fly? [closed]

In E.T. the bicycles fly. In old films we see some inventors try to construct a bicycle which flies, with wings similar to a bird's. Yogi bear has a flying ship. See the picture above the site. The ...
0
votes
2answers
134 views

Shimano Deore XT: is 9-speed no longer continued? (Europe)

For an upgrade I'm trying to decide whether to change to 9-speed or 10-speed cassette, chain, derailleur, shifter and crank. On the european Shimano website there are not many words about 9-speed ...
0
votes
3answers
301 views

I am 6ft and riding a firefox kompac. My speed never crosses 18kmph

What is the difference of having larger no of teeth in the front derailleur? does it help in speed and distance covered? Suggest a good hybrid on which I can achieve faster speeds? My budget is $700.
0
votes
2answers
156 views

Gears, distance, cadence = Speed [closed]

My bike is a Giant "Revolt" and I have a speed/Cadence sensor (from Giant). It doesn't always record accurately. But my question: I'm looking for a Chart that gives me the distance traveled & ...
0
votes
2answers
303 views

What to upgrade to achieve a higher top speed?

I enjoy going fast and my current bicycle tops too early, what kind of upgrades would I need to make to achieve a taller final gear?
0
votes
1answer
196 views

Do pedal-driven bicycles exist that can handle highway commutes?

Do pedal-driven bi/tricycles exist which can be driven at highway speeds without fuel or electric drive assistance? Assisted brakes, steering, lights, and amenities such as climate control or ...
0
votes
1answer
129 views

Scott S30 road bike 11speed with 10 speed compatibility

I have a Scott S30 bike currently running a shimano 105 2x10 speed 50-34 crankset, shimano 105 10 speed front shifter and 10 speed cassete and chain. I have a new crank that i want to install, the ...
-5
votes
1answer
220 views

Speed On a Road Bike [closed]

My old (But freakin' awesome) french road bike goes fast, considering that the only times im racing is pretty much against my friends who all have mountain bikes. Needless to say I always win. But I ...