23 votes
Accepted

belt vs chain for what matters performance only

First things first: A belt is probably slightly less efficient than a properly installed clean chain. The test you link already indicates that. Probably with the tension Gates requires you'll loose a ...
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14 votes
Accepted

How efficient is string bike? Is this really a revolutionary bike?

The general idea of "lever drive," or a reciprocating pedal motion instead of a rotary pedal motion precedes even the invention of the modern diamond-frame bicycle--consider the Special Star from 1886....
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  • 24.5k
10 votes
Accepted

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

Riding at 30kph average for 3 hours, in a hilly area is a solid effort. Assuming your pack riding skills are sufficient, you will also likely do fine in in a club ride that averages 30-40kph (but see ...
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  • 29.9k
10 votes

Planning to purchase a road bike

You basically get what you pay for, so there isn't any secret formula. Trek is one of the largest manufacturers on the planet, and is probably as good as any other on the market. But have a look at, ...
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  • 9,613
10 votes

Why is my new front wheel not spinning?

The most likely problem is that the brakes are rubbing. If you pick up the front of the bike, hold your head near the brakes and spin the wheel you shouldn't hear any noise from the brakes. If you ...
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  • 4,122
9 votes

How does a bike's weight affect the overall experience of owning it?

I am continuously amazed at the overemphasis placed on the weight of bikes. Yes it is important, but relative to other factors in deciding which bike to buy it is not that significant. Lets compare a ...
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9 votes

What are (a) the source of and (b) the justification (e.g. experimental) for the concept of "normalized power" used in physical endurance training?

My understanding is that high-intensity efforts are disproportionately taxing, and NP is a way of reflecting that. That is, if you went for one ride where you maintained a steady 75% FTP output, and ...
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  • 24.5k
8 votes

Are there any scientific studies proving the benefits of clipless pedal systems?

It seems like scientists tend to test athletic performance. The actual benefits of clipless pedals are: If you are cycling fast, you get a lot of unanticipated jolts and vibration which can make you ...
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  • 199
8 votes

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

Everything is relative. For 99% of the population 30kph for 3 hours would be amazing. For a male A grade club rider it would be an off day. For a female A grade club rider it's not bad for a solo ...
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  • 17.1k
8 votes
Accepted

Would Putting BMX Bike Brakes on my Road Bike be Ok?

Not easily. V-brake levers pull twice as much cable as a calliper brake levers, so you'll not be able to swap them without swapping the levers too, and these are often attached to the shifters, so ...
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  • 5,736
8 votes
Accepted

Just how much difference does your bike make?

Bicycles, like many machines, are efficient, but a large amount of energy converted by them is not in fact used for their "intended" purpose: The largest energy sink is air/wind resistance, which you ...
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8 votes

losing weight versus getting lighter bike

If you want to get faster, train better. On flat terrain, weight is virtually irrelevant for your speed. It is only relevant when you accelerate or brake, but not while you are riding at speed. So ...
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7 votes

Is a Roadie with wider tyres still faster then a MTB with slicks?

I'd recommend a Cyclocross bike (also called CX). That's a robust road bike frame, configured to accept tyres up to about 40mm wide. You won't need 40mm unless you're doing proper off-roading, but a ...
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  • 1,336
7 votes
Accepted

Does cannabis affect cycling performance?

Are you asking about the immediate effects while high or long-term effects? I can't find any unbiased, well-cited sources except for one from the British Journal of Sports Medicine which basically ...
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7 votes

Disadvantages of using QR->Thru Axle Adapters?

This is a deceptively complex question because it touches on many aspects of hub design, and answering it properly would also require taking some kind of survey of what design choices have wound up ...
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7 votes

What are (a) the source of and (b) the justification (e.g. experimental) for the concept of "normalized power" used in physical endurance training?

Focusing more on the empirical part of the question, consider the link that R. Chung gave in his first comment to Adam Rice's answer. That's the introductory chapter to Andrew Coggan's book, training ...
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  • 20.3k
6 votes

Why does hunger have a much more drastic effect in cycling than in other endurance activities?

The short answer is that it is purely down to your individual training level and mechanical efficiency in each of these disciplines. Bonking is a result of fully depleting your glycogen stores. Once ...
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  • 16.3k
5 votes

Would Lowering my Handlebars Help my Performance?

If you are looking for pedalling performance, adjusting the seatpost (up and down) and the seat (back and front) is the answer. There are literature about adjusting seatpost so you can look them up on ...
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  • 3,461
5 votes

DIY computational fluid dynamics for aerodynamics?

Has anyone experimented with using consumer 3D software to do CFD-like aerodynamics simulations? - Yes Could there be any worthwhile insights gained from this? Yes However, you should not view work ...
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  • 443
5 votes

Are there any scientific studies proving the benefits of clipless pedal systems?

Surprised there are not more studies on efficiency of clipless. The original question was to seek a scientific answer, not anecdotal, although many feel clipless gives more, this is subjective if not ...
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  • 51
5 votes

Should one pedal over a mild slope?

Because wind resistance is proportional to velocity squared it takes more power to go from 30 to 32 than from 15 to 17. So you get more bang from your pedal power at lower speeds. If it is a ...
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  • 15.4k
5 votes

Air Pressure on wheels

The optimum pressure for any kind of bike is going to depend on a lot more factors than just the type of bike. You have to look at many other things such as rider weight, terrain, and tire size. It ...
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  • 21.4k
5 votes
Accepted

Optimal beginner training

Training plans are all well and good, but the first goal is to be able to ride 9 hrs. There is no substitute for doing long rides to prepare to do a long ride. In my experience, for just developing ...
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5 votes
Accepted

Running tires with significantly different pressures?

The markings on the tires for the pressures can be essentially ignored. They're a combination of marketing and legal departments coming up with essentially arbitrary numbers. Find a set of pressures ...
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  • 45.6k
5 votes

How do you bicycle the most efficiently on a road bicycle?

The first answer is: you bike most efficiently inside a peloton (where air resistance is lowest) The second answer (in a GCN video of a sprinter): you do a lot or close to no effort in order to stay ...
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5 votes

How do you bicycle the most efficiently on a road bicycle?

General Rule of Thumb: Go harder on "slow" parts (especially uphills), go easier on "fast" parts. This rule of thumb has two separate justifications: (1) Uphills or on slow surfaces (rough ...
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  • 1,402
5 votes

losing weight versus getting lighter bike

The exact wording of relevant bits of the question is: losing weight or getting the same weight less in a lighter bike ... assuming that the new bike purely weighs less and not better mechanical ...
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  • 20.3k
4 votes

Optimal beginner training

A perfect book for beginners in training is Joe Friel's "Cyclist's training bible". The main point he makes in his book is training periodization i.e. changing the volume and intensity of training ...
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  • 1,344
4 votes
Accepted

Why does hunger have a much more drastic effect in cycling than in other endurance activities?

The Science behind bonking This is a really interesting article applied to running but no doubt the same applies to cycling. The interesting quotes being "It is impossible to prove that muscle ...
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  • 3,061
4 votes

Is a Roadie with wider tyres still faster then a MTB with slicks?

We don't do product recommendations here. Generally speaking, a road bike will be faster than a MTB for the same rider. That said, road bikes are less robust. I've popped road tyres on potholes ...
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  • 101k

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