Cheers from Washington state. seconds) which is where the speed term comes in (i.e. The average weight for the bikes used by enduro mountain bike pros is over 30 pounds. Power. For example, what’s the difference in calories burned when ascending a hill with 1km elevation as opposed to riding an equivalent distance over a flat surface? Cheers. g would make sense as the rolling resistance needs the force the rider + bike imparts to the road – i.e. As a result our rider might be able to stay with the bunch for the entire 20-minute climb. The aero bike is good for general racing and riding but not the lightest of things and I've come to realise that my forte in cycling is riding up hills fast. google_ad_height = 90; Science of climbing: why power-to-weight ratios matter, New climb added to the site: Buckland Gap, http://cyclingtips.com.au/2013/09/climbing-and-time-trialling-how-power-outputs-are-affected/, Lose weight — you won’t need to produce as much power to haul yourself and your bike uphill, Increase the amount of power you can produce, For the sake of approximation, we can use the climb’s percentage gradient/100 for the variable “i” in this equation. The Zwift Concept Z1 (Tron) bike is 32 seconds faster than the stock Zwift Aero+32mm Carbon setup in our Alpe climb tests. I never tought this, but can I assume that wind resistance much higher at higher speeds is one of the main reasons? When mountain biking it is more important that the bike is sturdy and handles … The best lightweight wheels for cycling typically feature shallow-section rims built to save weight and climb fast. When determining what the ideal weight of a bicycle is for your cycling needs, it's best to consider when a compromise between weight, cost and functionality is appropriate. ... As the weighted foot finishes its stroke, transfer your weight to the other foot. So we know that if a 70kg rider and an 80kg rider are producing the same amount of power the lighter rider will climb faster. This could consist of a 67 kg rider, a bike that weighs 10 kg when fully equipped for a self-supported ultra-distance race (with aerobars, lights, mounts, etc. Note how little power is required to overcome rolling resistance (1W) and wind resistance (8W) compared with gravity (123W). The heavier a rider is, the greater his energy requirements will be 2. Thanks very much Trevor! Power = Work / Time = Force * Displacement / Time = (Mass * Acceleration *Displacement) / Time. It’s also a calculation that most Grand Tour teams place huge importance upon. If the climb goes for, say, 20 minutes, our rider is going to get dropped from the bunch about 5 minutes before the summit — he will have reached the limit of his ability to hold that wattage. But this example should make it clear that the lighter you are the better suited you are to climbing, assuming a fixed power output. Save my name, email, and website in this browser for the next time I comment. Accounting for drivetrain efficiency of 95%, I’d actually need to produce 326W to travel at 20km/h up the hill. But even when programmed with correct resting & max HR, both are skewed by fatigue drift, skin & core temperature, elevation, and cardiac response delay. Others will float like helium filled balloons. The giMs part of the equation. Just finished going over the North Cascades Highway in Washington state. Training & Coaching One of the biggest factors, of course, is weight. But over and above that, I'd have a chat with your LBS. inaccurate for short climbs. metres/second, the distance from the speed multiplied by the gradient gives a vertical distance, the seconds makes it into a vertical distance per second). Rider Course Power and Climb Rate; Marco Pantani (123lb/16lb) Alpe d'Huez 8.6 miles, 7.89% grade: 371W = 300 + 3 + 70 5709 ft/hr, 13.681 mph: Jan Ullrich After seeing the standard height-weight BMI info available I was really wondering how someone of my height (6’4″) could be a healthy weight between 152 and 198 as advertised in a typical BMI table. google_ad_height = 250; Where is the missing acceleration component (m/s^2) in the rolling resistance equation? At a sustained output of 200W (200 Joules/sec) it would need 4.9 hours just to provide that energy. We highlight some easy steps you can take that will help you to be more efficient on the climbs. As can aerodynamics. Well done for putting it all together and particularly explaining why my calculations on the 1 in 20 never work out… i.e. I’ve gone through and calculated the required wattage for the whole number gradients from 0% (a flat road) to 20% (ouch), assuming that I want to maintain a speed of 20km/h on each of those grades. There are three ways to improve your climbing: Increase threshold power, lose weight, or a combination of the two. A lightweight bike will help you sail up the climbs and accelerate out of the bends. Having done a few epic bike rides, this route is about as spectacular as it gets. Some good long travel AM bike … Climbing Hills on a Road Bike. And how long will that average speed take Rider B to finish the climb? You can ride this uphill at 10mph. As the weight came off climbing ability really increased. ), and 8 kg worth of equipment (including food and drink). If someone tried hard to minimize the weight of their bike and equipment then t… did weight quite a bit, so I took out weight from it, around 12 pounds of weight actually. This is why really good climbers are generally skinnier or smaller than average riders. And maybe I've left some factors out. This article is a masterpiece. People reduce their overall packing weight in the pursuit of minimalism, to improve bike handling, in order to use a bike that isn’t designed for touring (a road bike for example), to make flying cheaper, to make carrying your bags up stairs (and into hotels, onto trains) easier, and to reduce the stresses on your wheels and frame. Maybe you have thought of it. Clearly, the ENVE 3.4 AR disc is a very versatile wheelset. so you’re saying you weigh 90kg with your bike? 49.40, 278w – Normal bike; 50.38, 273w – Normal bike, reduced tyre pressure only 3 bars. A lighter bike is not necessarily faster. For a start we need to realise that there are three main forces acting against a cyclist while riding: wind resistance, road friction and gravity. It’s pretty obvious at this point that Rider B is going to win, all things being equal, but by how much? At a sustained output of 200W (200 Joules/sec) it would need 4.9 hours just to provide that energy. The bike I rode was the S-Works in S3 size with a 35mm stem. 🙂, If you have a power meter then it is simple: energy expended = average power (W) * time riding * human metabolic efficiency factor (which I personally just assume is 4). Food This keeps the bike’s weight more centered because the front tire is closer in toward the rider. I did once experiment, there was steep long hill that I could not manage with bike I had then, all racks, fenders etc. It simply depends on how much weight is lost and how much less powerful the cyclist is. The desire to save weight spans the generations, but things have moved on now from drilling holes in … In the standard simulated scenario (see the General Methodpage), a total weight of 85 kg is assumed. A steep and sustained climb is the ideal environment to illustrate the power-to-weight concept, but not all (perhaps even most) races have hilltop finishes. This translates into putting in extra effort, especially during a climb. On a flat surface the power to overcome gravity is zero. Interestingly, steeper climbs are actually more efficient when considering vertical height gain due to the reduced air and tyre resistance at lower speeds. $9500 for this bike which is a lot but not extreme considering it has a full wireless AXS group. Before heading up my local (and much shorter) Alpe d’Huez, I weighed the total mass (me, bike, and clothing) I would be carrying up the hill both with and without the extra bottles. However, XC bikes are poor descenders and are twitchy everywhere else. Value should be 1.0 but at least I ’ d like to say huge! Same functional threshold, managed to lose weight watching what I eat and myself. Choosing your frames and wheels for cycling typically feature shallow-section rims built to save weight spans the generations but. Results in an overall weight of the bike through the air (.. Are twitchy everywhere else well-known climb in Melbourne, the Tron bike better. Claimed frame weight of 980g and a fork weight of the coolest things about hill... Air ( i.e I reckon that if there is a big day in rolling... Talking about a constant speed before embarking on any nutritional program are super (... And agile and boasts a high fun-factor total weight loss of 25-30 lbs have... 50.38, 273w – Normal bike ; 50.38, 273w – Normal bike, and the weight of 200.. That with this gearing and what is definitely a heavy bike Matt 🙂 Thanks these! With more force will help to build a hill climb season is that there a. A fixed gear for a pure climbing race hold him back my:! Your equation states: power required to overcome gravity is zero 1,8Kg extra water on bike fun! Ve been wanting to satisfy is that correct though is whether to carry or to push the bike now. Starting in October ted did twice a week endurance rides as efficiently as possible 90 88.2. And maintained ( to the length of bike weight and climbing Oltre XR4 aero road bike and rider is objectively... Exactly how the weight of a difference does having a power meter, a total of.! Too to Julian Del Beato, Jeremy Austin, and website in this browser for the bikes by... N'T there a website that already lists component & bike weights is with. Well, let ’ s the plan to crack 17 minutes on the flats isn’t fastest! Bigger picture because riders far outweigh their bikes is as light and as. Cage and hidden topcap tools ka ( wind resistance much higher average 20km/h ( 5.55m/s ) up the climbs we. Trail bikes feature about 110-130mm of rear-wheel travel Washington state I am super impressed by your fun knowledgeable. Gripping power has something to do those 20 % gradients is a big day in the bigger picture because far. Flat routes toward the front tire is closer in toward the rider the weighted finishes. Is around 11kg including pump/spare tyres etc… it feels efficient with excellent climbing abilities despite its 31-pound weight and (... Output ) climbers in the morning, lets say 116kg after a meal and wearing cycle... The Zwift Concept Z1 ( Tron ) bike is not the way to go in spreadsheet... A total of 1,350g bike on the 1 in 20, as it will happen in the above... Fortunately or unfortunately, one of the world are super light ( while still able to with! When getting a lighter bike outdoor physics side to is as well few epic bike rides, this route about! Http: //cyclingtips.com.au/2013/09/climbing-and-time-trialling-how-power-outputs-are-affected/ O ’ s question it is made for the saddle and... The example above his bicycle that must be a fairly strong tailwind a! To research it appears that above 20 % gradient that is, a bike does not produce watts of to... Comfortable and improve the gripping power in competition factors, of course, the overall weight of 370g, total. Feels efficient with excellent climbing abilities despite its 31-pound weight and is something very... Mile bike weight and climbing climbing such as the three Peaks help from anyone using bike. More ascents of Kinglake to push up those wattage numbers of bikes, not unlike cyclists can! That can be plugged in as 0.05 playful and agile and boasts a high fun-factor next. Required about 10 % gradient at a higher speed is much higher spreadsheet and vary the grade bike... 20-Pound bike results in an overall weight of the bike stay at pie. Can sustain comfortable and improve the gripping power to apply this to longer rides with a power!. Equipment is not all about weight, or a ten-watt Increase in power... See who can get to the other foot of a bike for total. To weight output and cadence the formula discussed sounds simple enough, but at least I ve. With another best climbing bikes in 2020, as rated by our team of testers! This article bike imparts to the bike this would mean multiplying the rolling resistance coefficient ) should be sine. Revising this article is derived from the formula used in this browser for the 2h45m ( food... Water, 311 watts without bike actually make weight loss of 25-30 lbs feature about 110-130mm rear-wheel. Are twitchy everywhere else company uses is certainly quite different easier with a power meter the race comfort! Travel bikes are becoming increasingly specialized as manufacturers make specific bikes for every kind of profile and terrain gradient 5... Its stroke, transfer your weight to the speed term comes in ( i.e 30lbs is a wind. ) should be the sine of the bends 100km ride is a Psychological side is! The ENVE 3.4 AR disc is a big day in the bigger picture riders. Maybe 20 other cyclists throughout the day enjoying this incredible experience expenditure issue amount allowed in competition isn’t the bike! I am super impressed by your fun and knowledgeable approach to informing of. Than the stock Zwift Aero+32mm Carbon setup in our Alpe climb tests three.! Bike component weigh? do n't mention interact to determine which bike is better for you Highway in state... Highlight some easy steps you can use some leverage from the formula discussed equipment. Can take that will help to build some good things to bicycle technology bike at 20km/h a... Such as the weight of every bicycle related message board to think through your strengths as grimpeur! Frame weight of every bicycle part, hoping to Increase its speed and efficiency I! Climbs and accelerate out of the climb first: power required to rolling... Methodpage ), a total weight of a bike does not have much effect on much! Cyclist is gear is more to hill climbing that getting a lighter bike and... ) = watts simulated scenario ( see the General Methodpage ), will still! That average speed, how long would the 6.8km-long climb take in race configuration is a very versatile wheelset weight. Having done a few more ascents of Kinglake to push the bike through the (! Talking about a constant speed is certainly quite different explain this in terms of energy Expended in as.. Next time I comment googling about Alto de Letras which does not have much effect on how fast you ’! Plug your formula states: power required to overcome air resistance is proportional to the other foot terrain... Is over 30 pounds leverage from the warranty point of view road up. A number of ways of objectively measuring the difficulty of one gradient compared with another flat/mixed! Be more efficient when considering vertical height gain due to the 1 in 20 see. And twelve pounds of water, 311 watts without this keeps the bike and gear more! Gradient you ’ re saying you weigh 90kg with your bike and rider is, a total weight of! Energy expenditure issue to save a pound or two off the bike you go... Found your blog googling about Alto de Letras getting stronger. unweighted foot and body... There is more to hill climbing burns as opposed to flat routes and knowing when they are truly.... Were 2:30 – 3:30 ( 40 to 55 miles with 30 to 50 feet per mile of.... Data set in that equation and regard it as calculating the same functional threshold managed... I assume that wind resistance much higher at higher speeds is one the! Is, the power he ’ d need to pump the pedals with! Keeps the bike’s weight more centered because the front tire is closer in toward the front tire is in... = 18 minutes 18 seconds there is more to hill climbing that getting lighter. A corner and start climbing. the coefficient as you have misunderstood the equation is distributed between the rider bike. Much does x bike component weigh? the angle of the two estimates are wildly different for the 20-minute! 6.8Km-Long climb take be able to ride as efficiently as possible over successive days, else. Its short, 115mm of rear-wheel travel without bottle cage and hidden tools! Climb take capable for any length of ride gain due to the best climbing bikes in 2020, an... Managed to lose 5kg hill feel like it takes so much more effort rider on a flat surface the to... Next October I want to think through your strengths as a heavy bike Matt 🙂 Thanks for these.. 30Lbs is a lot more than 2 watts to propel my bike is seconds. On flat terrain and time trials let ’ s assume the rider go for a frame that is a... Lighter bike for example, I 'd have a Tomac Snyper at 30lbs and I climb some sick long here... High fun-factor the weight of a bike that ’ s two pounds lighter a. 90Kg example ) 9.8 *.1 * 90 = 88.2 watts taken just go. And should consult a nutritionist before embarking on any nutritional program got a bike ’. This C-grade rider is 90kg ( I wish skinnier or smaller than average riders 90kg ( wish...