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6
votes
3answers
211 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 ...
24
votes
9answers
59k views

What is a reasonable speed for long distances on a bike?

I am curious what a reasonable speed to travel on a bike is. Speed will obviously vary based on the conditions in which you are riding. I am planning on taking the GPS out with me this weekend to ...
5
votes
1answer
105 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
131 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
138 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 ...
2
votes
6answers
1k views

Do higher speed crashes result in less serious injuries.

I have heard that the severity of injuries tend to decrease while riding a road bike at high speed. An instance of high speed would be like those in the Tour de France. The reasoning behind this idea ...
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 ...
5
votes
2answers
1k 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
167 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 ...
5
votes
2answers
553 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 ...
-2
votes
2answers
279 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
2answers
122 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
146 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?
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 ...
9
votes
10answers
2k views

Why aren't average speeds computed over distance?

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 ...
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 ...
20
votes
13answers
23k views

How can you speed a road-bike up?

So, I have an 80's raleigh bike, reassembled from spare parts. I'm wondering what the best way to get more speed out of the bike is. Wheels? Gears? Lighter gear? Different pedals? I'm rather fond ...
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
740 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 ...
1
vote
2answers
494 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?
6
votes
5answers
5k 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 ...
6
votes
1answer
641 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 ...
4
votes
2answers
300 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 ...
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 ...
0
votes
1answer
191 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
125 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 ...
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?
13
votes
7answers
4k views

What skills/drills should I learn to descend faster and more confidently? (for mountain biking)

I've ridden road and mountain bikes for years, and this is my first year riding as a part of a team (and actually doing races). I've been stuck at nearly the same level of skill when descending and ...
0
votes
2answers
146 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 & ...
55
votes
25answers
45k views

Why aren't Tour de France riders going any faster?

I was having a look at the average speeds of the winner of the Tour de France over the years on this page. To help things along I put the data into LibreOffice and produced a plot: I put on the ...
4
votes
4answers
556 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 ...
1
vote
3answers
566 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. ...
0
votes
3answers
284 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.
3
votes
2answers
871 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 ...
3
votes
3answers
458 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 ...
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 ...
0
votes
2answers
486 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
728 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 ...
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 ...
2
votes
3answers
926 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?
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 ...
9
votes
6answers
9k views

Does a 700c wheel help you go faster?

Someone suggested going with a 700c wheel to go faster, and after thinking about it I am wondering if a larger wheel actually does go faster. I understand that your gears will cause a wheel to rotate ...
17
votes
3answers
4k views

What are the most significant factors affecting downhill cruising speed?

When I'm riding with my friend, I notice that he rolls down hills significantly faster than me. We can be riding next to each other, both in a similar aerodynamic position, but if we both coast he ...
4
votes
3answers
3k 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 ...
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 ...
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 ...
-5
votes
1answer
218 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 ...
4
votes
6answers
26k 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 ...