Gravel Vs. Trail Bikes

[6zfshdb]

What are the differences and how are bikes equipped for each type of surface? Pictures welcome.

I'm basically a trail rider who avoids roads as much as possible. The trails I ride here in the east have mostly mixed surfaces, including pavement, packed limestone & decomposed granite, dirt, grass, sand and some loose gravel. Slopes range from zero to 15 degrees. Perhaps it's the part of the country where I ride, but I've never come across a mostly gravel riding environment. The closest would be beaches with varying sizes of stone mixed with sand. Are there places across the country that cater specifically to gravel bikes?

Over the years, I've equipped my bikes to handle these varying surfaces by adding semi knobby tires, front suspension forks, anti vibration handlebar shocks, a quality suspension seatpost, wide range 10T-52T 11 speed cassette and a comfortable saddle. I would dearly love to have full rear suspension, which most gravel bikes I've seen have, but haven't found a bike thus equipped that fits my upright riding style.

What am I missing? Just what is a gravel bike and how are they equipped?

 

[Stefan Mikes]

Are there places across the country that cater specifically to gravel bikes?

Kansas

But honestly. There are two flavours of gravel bikes:

• Racing geometry, extremely lighweight, totally unequipped (just for racing)
• Relaxed geometry, heavier (could be even steel), with multiple equipment bosses: for several water bottles, tools, fenders; frame, handlebar and saddle bags and even fork bags could be installed as well as detachable lighting. These are for bike-packing.

The very specific feature of a gravel bike is it is very fast on paved surfaces and pretty fast off-road. However, a gravel bike is not the thing for a technical singletrack.
Trail bikes are for technical singletracks and that's it. These are excellent climbers especially on rough surfaces and are pretty safe for bombing gnarly descents. Trail bikes are not applicable where the speed matters (except downhill). Riding a trail bike on a paved surface is usually a painful and slow experience.

 

[stompandgo]

Are we talking e-bikes here? The other question is drop bar or flat bar?

What are your priorities? There are a variety of options.

Weight
Suspension
Power

 

[Stefan Mikes]

Just what is a gravel bike and how are they equipped?

Perhaps I should have explained that first. A gravel bike is:

• A specially designed version of a road racing bike for fast riding asphalt, gravel and off-road
• Usually, a gravel bike is designed for drop handlebars although flat handlebar gravel bikes exist, too (see Marin DSX 3)
• A gravel bike has no other suspension than its own tyres. Some gravel bikes have a sort of suspension for the stem and/or seat-post
• The tyre width is usually 38 to 55 mm on 700c wheels. The most typical size nowadays is 700x45c
• A gravel bike often comes with a dropper seat-post
• The frame is designed for pretty wide tyres
• The bike geometry is relaxed, allowing the rider spending many hours in the saddle without getting much tired
• The drivetrain is a hybrid between a road and MTB type. It supports drop-bars but the gearing is more of the MTB type: more rugged, and it is geared a way lower than for a road racing bike
• Although the 2x drivetrain is still popular, you will meet a 1x drivetrain on a gravel bike more often than on a road bike
• Gravel bikes need to be really lightweight. The rider has to be able to carry the bike over an obstacle as bunny-hopping is rather not done by gravel cyclists
• Often, the gravel bike frame is made with multiple bosses for the equipment needed on very long rides.

A typical modern gravel bike.

A typical modern flat handlebar gravel bike. The fork for such a type is usually made of carbon fibre.

 

[RunForTheHills]

Full suspension was originally intended for downhill mountain bikes. It was adapted to e mountain bikes because they can reach the same high speeds of downhill bikes on all kinds of terrain. Kind of like a motorcycle. If you are going too fast to avoid or absorb a bump or pothole with your knees or riding technique, you need a bike with a good suspension. However, full suspension bikes are very inefficient for pedaling.

 

[Chargeride]

Super light gravel bikes are very quick and if the terrain is too much, just throw it over your shoulder and walk

 

[RunForTheHills]

I wanted to add that, while full suspension is more useful than fat tires, I think it belongs in the same category. It is a feature that makes pedaling the bike more difficult in trade for being more comfortable to ride and is really only practical with a motor on the bike (or used for downhill as originally intended). That's why you don't see this kind of suspension on performance bikes like gravel and road bikes.

 

[Stefan Mikes]

more comfortable to ride

It is not about the ride comfort. Full Suspension is for maintaining traction at all times and for protecting the rider during landing after a jump. That's way FS bikes shall never be mentioned together with fat bikes.

An MTBer rarely sits on the saddle, it is more standing on the pedals on descents.

 

[6zfshdb]

So..... It seems from all the info provided, a gravel bike is more like a road bike, except with fatter tires.

 

[RunForTheHills]

The geometry and gearing are different from a road bike as pointed out above. There is gravel bike racing that these bikes were originally designed for. A lot of people in California use them on fire roads and other rough terrain. They are not specifically for roads with gravel on them.

 

[Chargeride]

90% rider..unless its a fatbike

 

[stompandgo]

Full suspension was originally intended for downhill mountain bikes. It was adapted to e mountain bikes because they can reach the same high speeds of downhill bikes on all kinds of terrain. Kind of like a motorcycle. If you are going too fast to avoid or absorb a bump or pothole with your knees or riding technique, you need a bike with a good suspension. However, full suspension bikes are very inefficient for pedaling.

Very true, but lightweight (~25 pounds) analog mountain bikes are raced from the local to UCI World Cup level for XC, Enduro, and other non-downhill classes. Downhill MTB's look more like unpowered motorcycles these days.

 

[Stefan Mikes]

So..... It seems from all the info provided, a gravel bike is more like a road bike, except with fatter tires.

It is the most simple definition, yes. The devil is in the details, though. For instance, gravel bikes are usually equipped with "flared" drop-bars. That is, the drop is wider than the hood area. It is for greater stability in rough terrain. Gravel bikes are more rugged than respective road bikes.

That's why a gravel bike needs to be lightweight

Nothing should stop a gravel cyclist

It is not only the bikes, it is about the culture. For instance, gravel cyclists hate their bikes being flashy. It is often very difficult to even read the make on a gravel bike.

The group riding is the essence of gravel cycling. Long distance, high speed. Road cycling is all about the peloton. Gravel cycling is about a group, which doesn't use the benefit of techniques such as drafting. However, there is a great sense of camaradarie. Unless it is a race, people help one another in a case of a breakdown. ("Self-sufficiency" is the word on the gravel race. There even is a Solo category where you must ride alone and never be helped by others!)

Fancy a heavy e-MTB there

And then the reward comes at the finish line

The industry has coined the name of "adventure cycling"

Someone has invented a cute definition: "Gravel cyclists are the roadies who ride across the road" It is because they emerge from the woods, cross the asphalt road, and get into the forest again

 

[stompandgo]

If we are not talking about e-bikes, here is a comparison of the geometries of a road bike, comfort road bike, and a gravel bike.

Pinarello Dogma F1. This is a WorldTour class racing bike.

Pinarello Dogma X1. This is a high end comfort road bike.

Pinarello Dogma GR. This is a high end gravel bike.

For any given frame size, pay attention to the overall length, the head tube and seat tube angles, the head tube and chainstay lengths, and the reach and stack. Think about how a rider would be positioned on each one, using the bottom bracket as a reference.

Road bikes have the tightest geometry. Shorter length, more forward and aggressive position, shorter head tube.
Comfort road bikes are similar, but are longer and less aggressive, with a taller head tube.
Gravel bikes are even more relaxed than a comfort bike.

For wheels and tires, road bikes generally use 28mm-32mm tires, comfort 32mm-35mm tires, and gravel bikes 40mm-50mm tires.
For gearing, road and comfort bikes are almost exclusively 2x, but gravel bikes can be 1x or 2x.
Some gravel bikes have a front suspension fork (i.e. Lauf) but most do not. They may have a suspension or dropper seatpost.

Have at it.

 

[Chazmo]

Good stuff, Chris. I wonder if I could ever get comfortable on a gravel bike.

 

[PCeBiker]

If we are not talking about e-bikes, here is a comparison of the geometries of a road bike, comfort road bike, and a gravel bike.

You forgot about me !!

I'm just a slacker that doesn't like to pay attention in class. Lol

@6zfshdb if it were me, and I were to start over, I'd skip all that Fat Bike nonsense, and buy the downhill frame that I always wanted,..


I just found this on AliExpress:
C$1,898.68 | Suspension Bicycle Soft Tail Frame,Trunnion MTB Enduro DH XC AM Cycling 29/27.5ER Boost 148mm DDP Full Suspension Bike Frames

https://a.aliexpress.com/_mNnOedP

Now I want one !!??@#
I can just swap all my parts??

It should be able to handle two motors and two batteries.

My frame is Too Fat.
It's got a skinnier front end now but it's got that Shitty Quick Steer rake angle crap that I Hate !!

 

[Stefan Mikes]

Good stuff, Chris. I wonder if I could ever get comfortable on a gravel bike.

People ride even for 300 miles or more on them

 

[stompandgo]

You forgot about me !!
I just found this on AliExpress:
C$1,898.68 | Suspension Bicycle Soft Tail Frame,Trunnion MTB Enduro DH XC AM Cycling 29/27.5ER Boost 148mm DDP Full Suspension Bike Frames

https://a.aliexpress.com/_mNnOedP

Oh yeah. The universal bike frame. It does enduro, downhill, and cross country equally well. You can show up to a road race with a 3 speed, too. Good luck with that.

 

[PCeBiker]

I've already got all the parts I need.
I just need a frame.


Is it too late to update my wishlist for ??

It's the day before Christmas.
He might already be on his way??

 

[PCeBiker]

Good luck with that.

Should just snap together like Lego.
Easy-Peasy


I've got this old thing for spare parts, but it's All Full of FAT Parts.


Post in thread 'Creativity is on the decline' https://forums.electricbikereview.com/threads/creativity-is-on-the-decline.57361/post-674351