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4
votes
3answers
528 views

Maxing out on gears [duplicate]

I have an older specialized bike from 2001 that I ride and race on with a gearing of Shimano 53/39 and 9-speed cassette 12/26. On my regular weekly rides I end up maxing out on my gears and can't get ...
7
votes
3answers
258 views

At what speed does Aerodynamics of a bike come into play?

Is a more aero bike more efficient than less aero bike at 10mph? At what speed does Aerodynamics affect your speed significantly. update: "The question is dealing with the minimum speed that a ...
3
votes
2answers
201 views

Foot shifting while pedalling

I have been contemplating clipless pedals as the next logical step. So after a bit of research and reading this question and it's answers I find myself a bit unconvinced mainly because nothing covers ...
6
votes
3answers
225 views

Which components affects downhill speed? [closed]

So my riding buddy can never keep up with me downhill. I'm slightly heavier than him (5-10lbs). I have an older non aero bike. He has a newer aero bike. His is probably a few lbs lighter than mine....
5
votes
1answer
120 views

Flat land speed development

I guess I'll start off by saying that I am not a necessarily experienced rider. After years of doing ultra-marathon running I decided to move to triathlon to cross train. I signed up for a 70.3 a few ...
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 ...
3
votes
2answers
198 views

Spinning bike speed vs outdoor ride speed

I have been riding indoor on spin bike and I average 40 km/h, would someone help me translate these speed to outdoor cycling?
14
votes
9answers
2k views

Fixie vs Road Bike - the right fixie bike for bunch rides

At our local bunch rides, we're seeing more and more guys out on fixies and they are going at a phenomenal pace. We have a local segment called the "Chicken Run" (and it's flat) and this one guy in an ...
5
votes
2answers
2k views

what does a 22 gear bike look like?

I read that road bikes on average have around 22 gears and mountain bikes up to 30-40. But my hybrid only has gears numbered 1-3 on the left hand and gears numbered 1-8 on the right, so my bike's a 8 ...
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 ...
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 ...
3
votes
1answer
227 views

Can I upgrade to a 11 speed freehub or do I need to change everything?

I have a set of Shimano WH-RS10 hubs on my bike. Can I upgrade to a 11 speed freehub or do I need to change everything? If not what would I need to upgrade to 11 speed wheel?
11
votes
5answers
3k views

Legs are very weak

So, I've been riding at different levels of difficulty for years now, from a 33lb, one gear bmx to a 21 speed, 44lb mountain bike, and now to a 22lb, 21 speed road bike. Each bike had its own ...
12
votes
1answer
3k views

How difficult would it be to maintain 17.5 Mph for an hour?

Whats a good target speed to maintain inside a velodrome for an hour? I believe Bradley Wiggins maintained an average speed of around 35 Mph for an hour, how difficult would it be to maintain half ...
3
votes
1answer
1k views

How much faster will I be if I lose 10kg (from 100kg, all else equal)

All else being equal (power output, weather, wind resistance, etc.), how much faster will I be if I lose 10kg (going from 100kg to 90kg) while riding? Acceleration and climbing might be much ...
6
votes
1answer
656 views

Why exactly did Boardman manage a further distance than Wiggins?

In light of Bradley Wiggins' recent hour record of 54.526km, I heard a lot about how Chris Boardman has the absolute record of 56.375km. What I didn't hear and (hence my question) what I want to know ...
3
votes
3answers
2k views

Replacing an 8-speed cassette with a 9-speed one to make my bike faster

I'd like to make my 8-speed tokyobike Classic Sport city bike go faster so I'm considering replacing the 8-speed cassette with a 9-speed one which can be found on the tokyobike Sport. The bike has ...
4
votes
2answers
312 views

How is Sir Bradley Wiggins 3D printing his titanium handlebars?

I just read an article about how Sir Bradley Wiggins is going to try to break the 1 hour distance record soon. In it they mention One of the unique new features is a set of 3D printed titanium ...
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 ...
3
votes
3answers
2k views

Is a 29.5 km/h average speed decent for a 90 km ride (on road) with an elevation of 1200 m?

I have been riding about 150 km a week commuting and on the weekend. I frequently do rides over 80 km. I'm riding a carbon cyclocross (Ridkey x-fire) with slicks. My latest ride was on the ...
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 & ...
4
votes
4answers
611 views

How does weight and strength of a person effects the riding of bicycle at higher speeds?

I weigh very low about 56 kilograms and height is 5 feet 6 inches.I use a hybrid for fun and commuting. While riding i use the hishest gear on my bike always i.e 48 tooth front and 11 tooth back. I ...
0
votes
3answers
302 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.
6
votes
2answers
4k views

What are typical max speeds for pro downhill races?

Looking videos like Red Bull Rampage or Mega Avalanche make me wonder about the speeds attained by those pro bikers. How fast they go in straight line sections?
0
votes
2answers
307 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?
3
votes
2answers
963 views

Are folding bikes less efficient than full sized bikes?

I've recently been touring with my Birdy folder, and people constantly ask me if it's hard work to tour on a folding bike. Compared to my normal sized bike (which has the same gearing, 8-speed ...
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 ...
3
votes
3answers
506 views

What sort of bicycle helmet gives me better speed?

I am working to improve my segment times on Strava riding 10km to/from work. My average speed is 32 kmph, and over short segments (1km) I can set avg speed 44 kmph / max 49. Over the last year I ...
2
votes
2answers
520 views

Speed improvement from hybrid bike to road bike over 9km at 30 kmph?

What sort of speed improvement can I expect going from a $1000 hybrid bike (Merida Crossway Striker) to a $2000 road bike (Cannondale CAAD 10 - 105), all other things being equal? Presently I can ...
1
vote
2answers
788 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. ...
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?
8
votes
8answers
8k views

Will increased weight make me go downhill faster?

I have had this question for a while. I want to know how I can get down a hill as fast as I can. So, I was wondering if increasing the weight of a bike increases the speed on downhill stretches, or ...
2
votes
5answers
5k views

Speed and comfort of a racing bicycle?

I just saw this guy called Jason Rourke breaking the record of 112.94mph (181km/h) on his bicycle. I wish I could have such a bicycle to ride, but I have never ridden a racing bicycle with gears. I ...
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?
5
votes
2answers
558 views

At what slope will the best bikes keep a constant speed?

At what slope will the best bikers (in terms of aerodynamics) on the best bikes roll at a constant speed at 80 km/h on an asphalt surface on a dry day? The reason for this question is because it gives ...
7
votes
5answers
6k views

Why does reducing bike weight have such an impact on speeds?

I am trying to understand the physics of bike weight. I have just made a switch from an 11Kg road bike to an 8Kg one (obviously there are many more factors and differences between the 2 bikes other ...
5
votes
4answers
5k views

How fast can my bike go?

I have an old mountain bike and want to change to a Pashley style girlie bike. I use my bike to go to the shops, pop to places and go out and about with my dog running along side. I find the seating ...
4
votes
3answers
4k views

difference in aero bar design

I see that there are many types of aero bars, i.e., different designs. I am going to buy one but I am not sure which one is better. Here are two types of aero bar designs: Type1 Type2 The ...
8
votes
13answers
2k views

Why aren't average speeds computed over distance? [closed]

Average speed is computed so that average speed = total distance / total time. This means that if you go up a hill, which takes a long time, your average speed drops. This isn't regained on the ...
3
votes
3answers
1k views

Why is cycling on a road so much faster than cycling on a cycle path?

I normally cycle on a cycle path and I struggle to go over 10Mph on my bike for any distance. My Daily commute took me 58 to 42 minutes depending on how much I push myself. This morning and yesterday ...
4
votes
2answers
3k views

What is the braking (stopping) distance for bicycles?

A vehicle driver must keep enough braking distance (aka stopping distance) between him/her and a vehicle in front in order to avoid collision. It depends on the driving speed. What is the braking ...
-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 ...
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 ...
4
votes
6answers
29k views

How do I estimate how long it will take me to ride my commute?

How can a cyclist, new to commuting by bike and not all that experienced in riding, estimate how long a commute will take? I have been riding for 4 days to and from work. 156km over over 4 days. I'd ...
3
votes
2answers
501 views

Are flat handlebars stable at high speed?

I live in a mountainous area, and so there are lots of opportunities for descending at high speed. I currently have a bike with drop bars, and when in the drops, I feel very stable doing this. I am ...
9
votes
6answers
1k views

What is the most efficient way to ride up or down hills, and into or away from wind?

I'm trying to work out how hard I should push myself when riding up or down a hill. Similarly, how hard should I push myself when riding into, or away from, or perpendicular to wind? My aim is to ...
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 ...
8
votes
6answers
3k views

How do you shift your weight when leaning on a turn?

When I turn I usually shift my weight on the same side I'm turning to. To ease the discussion let's assume we are turning left, on a paved road (no mud/gravel/potholes/grease/oil/ice/door traps). I ...