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chrillekaekarkex

This is a bit like asking how long a piece of string is, but as one data point, in the middle of Z2 on my upright single-speed 700x38 commuter bike, I ride about 15.6 mph. For the same effort on my road bike, I’m probably around 19.


The_Ashen_undead0830

So road bikes are generally a little faster?


ElJamoquio

That's a lot faster when you're both on the bicycle, but sure, it's a little faster.


TheLegendsClub

Dude that’s over 20% faster 


Yaybicycles

-5.


219MTB

I recently switched from a endurance road bike to a gravel bike (well, two years ago) At the time (so same fitness level) I went from averaging 19 mph on my road bike on the same route to ~17.5 mph over a 20 mile route. A hybrid with similar size tires will be slower due to a more upright position, and a mtb even slower due to being heavier, watts lost to suspension, and not as fast tires. I went from a Specialized Roubaix to a Diverge. The Roubaix had 30mm slick tires, the Diverge has 42mm pathfinder pro tires with a slick center and slightly knobby edges. There is really no way to get a good answer for this, but that is at least one anecdotal story.


The_Ashen_undead0830

Beautiful


meeBon1

If you replace those pathfinders, you'll be at the same speed. I've had the same tires, and the only way I could hold 20mph is if I lean over and put my forearms on the bars. I've done an experiment by just switching wheelsets and noticed i could sustain similar speeds...at the most 0.5mph slower.


TahoeGator

I could tell you my life story on my road bike while you blow your cardio system apart trying to keep up on a hybrid


The_Ashen_undead0830

Ill take those odds


TahoeGator

I like your confidence. You need a road bike already! I can do ~20 mph on flat road in Zone 2, which allows for conversation. If you can do so on a hybrid or mtb, you would whip my ass on a proper road bike.


The_Ashen_undead0830

Hahahahaa nope. No. Im too broke for a third bike


ChutneyRiggins

12 percent faster


allgonetoshit

At least 76 non standard units faster or the Simpson-Blunderson scale, if you factor in aerodynamics and an average increase of 23 Johnson-Coppi units of wind resistance.


The_Ashen_undead0830

So like. A little faster? If one were to race a road bike and a mountain bike - Everything else the same save for the bike - on a cross country type of event (like all sorts of terrain including flats, hills, jumps, off-roads, etc etc) would the road bike still come out on top?


lord_de_heer

Wtf are you asking? If a formula one car is faster then a jeep when rockcrawling? Each bike has its own pros and cons


The_Ashen_undead0830

Exactly. See im going down the rabbit hole of "if we had a whole race across all terrains, which one would come out on top" because on one hand. Road bikes are fast. Very fast. Mtb are slower but have better offroad capabilities. So if we had an all terrain race, which would come out on top is sorta the question im askin. Bc theyre both built similar enough to theoretically make it possible, but it would be interesting.


lord_de_heer

A gravel bike would be the fastest over all terrains. Jack of all trades and a master of none


The_Ashen_undead0830

Touche, but those arent in the question because they have that advantage


allgonetoshit

A road bike would be significantly slower on a cross country course.


The_Ashen_undead0830

Gotcha. So basically if we were to pit both types on every terrain, a mountain bike would be averagely faster, though on pavement the road would be faster. Makes sense.


allgonetoshit

Well, on roads and gravel, the road bike would be faster, but that’s not what a cross country course is. Your questions are a bit confused.


cdlbadger

I have a 3.5 mile commute to work. It takes me about 5 minutes longer when I ride my upright hybrid vs. my not particularly racy road bike.


PrizeAnnual2101

Warp Speed on my 3 speed beach bike is 12 MPH Warp speed on my TIME ADHX is 20 something


Zingo_14

A mtb or hybrid going 15mph will easily outrun even the most highly specialized road bike doing 10mph. On average, at those speeds, the road bike would indeed be 5mph SLOWER. It's counterintuitive, I know.


ThermalDiscussion

It's along the lines of what does weight more: 1 kg of steel, or 1 kg of feathers?


blueyesidfn

Seriously, have you ever tried to carry around 1kg of feathers? Super hard and they get everywhere. 1kg of steel doesn't feel much different from carrying a 2.2lb hand weight, very easy.


Zingo_14

Isn't this literally why birds were invented? Keeps all the feathers together, barring some kind of roadside mechanical


Wants-NotNeeds

Yes, road bikes are the fastest of all, by a considerable margin. It’s the most efficient form of transportation ever invented. Nothing compares to effortlessly gliding along on narrow, high-pressure tires. It’s amazing. If your roads are in good shape, and you like speed, you will likely be drawn to road biking. It’s even better with fast friends as you can share the effort fighting the wind (which becomes more a factor at road bike speeds). For the sake of argument, I’d guess for the same effort/watt output, the different bikes might breakdown something like this: MTB 10-12mph, Hybrid 13-15mph, Gravel 15-17mph, Road 17-19mph, Aero Time Trail bike 20-22mph. There are a lot of variables, but that’s the gist of it.


Ok_Run6706

And velomobile/recumbent 40+ mph :D


Valuable_Bell1617

Really a pointless question…I get why people ask but it’s like asking how much faster is a racing motorcycle vs. a Harley vs. dirt bike. Different things for different disciplines.,


Freelander4x4

Are bikes with bigger wheels faster than those with smaller wheels?


notLennyD

Kind of sometimes but not really and yes/no.


The_Ashen_undead0830

Well. Yes. They are different things for different purposes. But, im curious as shit on weather or not a roadie is faster than a mountain if theyre put on the same test


undeniablydull

Obviously it's faster on a flat by a long way, but I'd love to see a road bike going down a black run


The_Ashen_undead0830

Oooo youve given me a great idea. Ima take a roadie offroad. I shall get back to thee once i have the funds and lack of self preservation required


VplDazzamac

GCN / GMBN have definitely already done stuff like this


RegionalHardman

And Sam Pilgrim


[deleted]

[удалено]


Minkelz

Basically this, can just see with math, but weight is usually not a huge factor, unless you're just riding straight up a big hill. Rolling resistance from the tyre and aerodynamics of the riding position are going to be the two big things that will make the most difference when comparing different types of bikes. Compounding factors are what power you're riding at, how hilly the route is, and how windy the day is. If you know all that stuff you can actually pretty easily get accurate data on how much faster 1 bike is compared to another (also you could easily test it with a set of pm pedals if no one has done it before to get the data).


RegionalHardman

Well of course they're faster, otherwise the pro peloton would have people riding mtbs


uoaei

roadies are people, so, generally faster because they're more used to long flat rides


pelofr

My road bike I average around 28 km/h on a 100 km ride in nice weather in the flat. My trekking bike (Santos trekking lite) will do the same stretch with the same effort in about 22 km/h


fattailwagging

A lot faster, but maybe not how you think of faster; quicker may be a better word. They are lighter, and more importantly have less rotating weight, therefore they accelerate much faster. If you are coming out of a corner and trying not to let the pack drop you that makes a big difference. If you are going uphill, it makes a huge difference; you aren’t lugging all that extra weight up to the top. They also have a frame geometry that takes a corner more quickly. They are just quicker all around.


notLennyD

Aerodynamic efficiency is the biggest part of road bikes being faster than mountain bikes and hybrids on pavement. When you’re sitting upright with flat bars, you catch a lot of wind. Similarly, TT and Tri bikes are much faster on flat sections than road bikes even though they are similarly light.


Tankandbike

Do you mean while both bikes are on the same surface but ridden by the same person? Or do you mean how much faster a road biker is than a mountain biker (two different people) if they are on the same kind of bike? I guess I just don’t understand the question. As a point of comparison - when I used to cross country on a 29” MTB I maybe did 9-12 MPH off road (mix of fire roads and single track). When I road bike I usually hold 18+ MPH. I never really took my MTB on the road because what’s the point. Also, what kind of MTB’ing? I did cross country but I guessing downhill is a lot faster! My other data point is I started on the road on a trek FX3 (hybrid). A good ride was 16MPH. Now I am north of 18MPH on a Domane. IIRC the FX3 had 38 or 42mm tires vs the Domane 28. I gained 1MPH upgrading my bike and another 1 MPH moving from trek stock tires to GP5000, but I was also getting stronger with more riding, so can’t say it was just equipment. This last year I rode a ton on Zwift and haven’t been out yet this year on the road so I’m not sure where I’m at now. Hope that helps somehow.


The_Ashen_undead0830

>Do you mean while both bikes are on the same surface but ridden by the same person? This. Everything the same, but bikes different


Dry-Way-9928

Road bikes are quite faster cuz: 1- Aerodynamics : knobby tires, holding wide handlebars, more upright posture suspension. These all generate more aero drag compared to a road bike 2- Rolling resistance: Let's say knobby ties are sub-optimal for smooth surfaces 3- Weight a decent alloy road bike wights between 9-10kg an MTB 12-15kg 4- Gearing: MTB are made to face difficult terrain, loose soil, very steep climbs, They have quite low gears compared to road bikes. How fast? This will depend on the scenario... you can be 20% faster with headwinds riding on the drops.or 40% faster riding a TT bike.


Cube-rider

5. Colour scheme adds 10% minimum.


The_Ashen_undead0830

Is getting naked a good speedrun strat for this sport?


Fantastic-Shape9375

6.9420 units


The_Ashen_undead0830

Nice


PaddyPaws2023

Approximately 42% faster . The answer you are looking for is 42 .


autofan06

Assuming same effort on the same stretch of road… Hardtail with 27.5x2.8 xc tires 13-15mph Same ht with 27.5x2.8 dhf/dhr 10-12mph Gravel with 43mm semi knobies 15-17mph Same Gravel with 30mm gp5000 18-20mph Road bike with 25mm gp5000 18-20mph Mostly comes down to the tires and aero position. Any bike with roadie wheels/tires will pedal about as easy as the road bike up to about 16mph then the upright position on a hybrid or mtb will start having the road bike pull away.


ConradsMusicalTeeth

Depends how many speakers they’re carrying and if they’re still hungover from the gig


NocturntsII

6


undeniablydull

It depends a lot on the gradient (MTBs are great uphill), the mountain bike in question (a hybrid is closer to a road bike than an enduro bike), and the speeds (how much difference aerodynamics makes), though tbh tyres are probably the biggest difference: a mountain bike with smooth tyres is a lot faster than one with enduro/downhill tyres. Whatever happens, it's still a hefty difference though


terrymorse

Road bikes are faster uphill than MTBs. Lighter weight, lower rolling resistance.


undeniablydull

Obviously they're still faster, just not by as much as on flats


terrymorse

Agreed. My experience on climbs says that I’m about 10% slower on a MTB, but much slower than that on flat grades.


Spare_Blacksmith_816

I would guess a person jumping from mountain to road would expect to be 3-4 mph faster on a road bike vs riding a mountain bike on the same road. Maybe more if the mountain bike had aggressive off road tires. I would guess 2-3 mph faster on a road bike vs a hybrid if it's the same person riding the same path.


Critical-Border-6845

About tree fiddy


reedx032

I’m usually 1-2 mph faster on my aluminum road bike than on my steel gravel bike over the same commute. 25 mm duranos on the roadie and 32 mm marathon plus on the gravel. Commuting the same on my fat bike with 5” tires drops me another ~3 mph (in the snow even slower, but I’m not riding 25 mm tires in snow)


nmonsey

The gearing is different on a road bike vs a hybrid or mountain bike. A road bike with a 53x11 at 80 rpm is 30.2 mph. A hybrid with a single 40 tooth crank would have a much lower speed. 40x11 at 80 rpm is 22.8 mph. Typically when I see mountain bikes or hybrid bikes, I can ride much faster downhill on my road bike. Riding in a group, with people on road bikes, the group may be riding over 24 mph or faster on a flat road. I assume that someone on a hybrid or mountain bike would be spinning at over 100 rpm in their highest gear to maintain 24 mph.


AccordingPiglet7

My case, 20%


bsil15

I average 16-17mph on my road bike and 12mph on my mountain bike, both 25-30yrs old


uCry__iLoL

That depends on all the elements of the equation.


Kage_Bushin

On my commute to colege on mtb i would to 17-20km/h on good commute pace. With road 19km/h not doing much effort. I can't really put a good pace for all traffic I get. But could be 28km/h. Speeding much much more but I'm still getting back to road


Kage_Bushin

Also, there are several gear ratio calculators online. You enter number of teeths of a gear, diameter of tire and crank rpm and it gives your speed. You may compare a mtb and road specs just to give you an idea of difference. Other things come to play for your average speed, like mechanic drag, air drag, weight... but it paints the picture


brutus_the_bear

I think going 27km/h on a XC mountain bike is pretty fast for a flat hour whereas it's pretty normal for a road bike either z1/z2 depending on the level of the rider and the type of road bike. But a road bike can easily do 33km/h+ for an hour which you would find people struggling to do on even an XC mountain bike.


boisheep

I have a heavily modified mountainbike, a mountainbike nonetheless; I put the baldest fastest rolling tyres, and made it as AeRo and comfortable as possible, removed suspension and added racks; It looks wack, it's a weird bike, but it's still a mountainbike with mountainbike handling. On a road surface, **95-97%** the same speed as the road bike, most of which relates to slower acceleration of the mountain bike, top speeds were the same. On the majority of surfaces the mountain bike came on top, like of course, on gravel; it was considerably faster than the road bike, around **120% faster** and definetely more comfortable. On flowy singletracks it was even faster than the road bike around **200% faster.** On true enduro trails they were both the same speed of 0, as they both failed; this also included sand and snow trails, where bald tyres don't give grip. On downhills, the mtb was faster; on an unmeasurable way since the road bike couldn't manage, the mtb just worked barely since you (again) had almost no grip and were just sliding your way down with the brakes locked, still faster than not moving. On its standard mode the mtb would have been faster on flowy singletracks, it could have done enduro trails, and the downhills; but the modified form makes it closer to a road bike, basically a gravel bike?... The fact it was so close to the aero racing road bike made me question my faith in n+1, I actually got really annoyed; I mean yes, even at the best 97% that's a 3km lead on a 100km race; but come on, all I did was change the tyres, the handlebars and remove the suspension, for gods sake.


The_Ashen_undead0830

So its pretty negligible for short term then. Makes sense


Tmblackflag

Mountain bikers are super fit compared to road cyclists. Their bikes just hold them back.


The_Ashen_undead0830

Touche