Do y'all really prefer 1x for gravel?

Especially for light weight issues concerning cyclocross / touring bikes & parts.

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Packs
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by Packs

I've got a 42 / 11-34, which is perfect for almost all riding conditions apart from knarly off road stuff where I switch to 36 / 11-40.

42x34 is the same as 39x32 (or 36x29) and 42x11 is the same as 53x14 (or 50x13). I've yet to spin out 42x11 - how often do cyclists pedal at over 70kph? Just learn to spin more.

The 2 cog jumps on 11-34 aren't too bad, at worst, I think the difference between 42x11 and 42x13 at 90rpm is 6kph. In the middle of the block it's around 2.5kph per cog.

blaugrana
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by blaugrana

Packs wrote:
Fri Apr 06, 2018 9:06 am
I've got a 42 / 11-34, which is perfect for almost all riding conditions apart from knarly off road stuff where I switch to 36 / 11-40.
If only there was a way to switch from one chainring size to another with the push of a button...

by Weenie


Marin
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by Marin

I usually just swap cranks, much faster than swapping rings :)

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Packs
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by Packs

That's what I'm doing too - with pedals still attached

sholiday
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by sholiday

wheelsONfire wrote:In a manic frenzy i ordered the new XT Di2 and an 11-42 cassette.
I am not sure i should keep it just to try.

Otherwise i've been on 44/34 and 11-36.
Not really sure if i keep it, what size chainring i should go for.
It seems a 40T, a 42T might be a bit over the top for fat 650B tires (47-52mm)

Wolf tooth have direct mount oval (PTE) chainrings for Easton cinch.
A 36T is similar to a 34T in dead zone and 38T in power zone.
Running a 36T now in the winter, along with my 11-36 cassette.
So far, the chainring feels great when pedalling. Much more so than Rotors Q-rings.

If i should test Hope tech 10-44 cassette nad perhaps Wolf tooth 40T (PTE) chainring.
Or just send the XT Di2 back and skip it.
Hm...

I think shifting is much better with my new crank and spider, than it was with my Shimano 6800 crank.
(Shimano chainline 43.5mm. Easton EC90SL + Kent Eriksen CNC machined 110bcd spider is 47mm)
Makes a true difference, no more chain drops, even without chain catcher.

I'm really not sure if 1*11 fill any gap or reason. Mainly, i was 50% bored and 50% curious.
I guess all this hype about 1*11 made me feel i should try what all fuzz is about.

Anyone here been fiddling with different cassettes and chainrings, 1*11 VS 2*11.

Sure, there is not 2 chainrings to shift between, but the cruder gear jumps should be quite noticeable!?
I guess guys with strong legs, won't notice this as much.
(a bit of ranting here,.. i know)
Get a Launardi 9/36 cassette with a 40 or 42 ring up front


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CBJ
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by CBJ

I have x2 gravel bike and I am buying a second bike and I think I will go x1 with XT di2 RD. Which will give me a lot of options between bikes. I finally live in a place with room for bikes so I have to take advantage of the situation. I have run x1 on the mtb for a long time and it will be fun to try it on the gravel bike. I think it will be great for a lot of the trails around here and there is little elevation to worry about. Just have to decide on gearing but 42 with 11-34 could be a good solution.

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wheelsONfire
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by wheelsONfire

I used Sram PG-1170, 11-36 and WT oval chainring with 36T.
It works great, but i'm still not sold on this.
The Leonardi cassette seems nice, but it's darn expensive.
I would rather use 2*11, 44/32 chainrings with this cassette.
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sholiday
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by sholiday

ProfessorChaos wrote:I recently aquired my second 1X Sram Force gravel bike, this one is a Specialized Sequoia, and the last one was a Diverge. I planned to put Force 22 on the Diverge, but never did. I have most of the parts here ready to install on the new bike. For me the 1x drivetrain just has too big of gaps between the gears with the 11-42 cassette. I replaced the cassette with a 11-25, and the RD with a short cage Force, and it feels noticably less drag in the drivetrain as well. Which makes since with bigger cogs having more teeth would be more contact points on the chain, and more contact would be more friction.

Don't get me wrong I love my
1x mtbs, but for road, and now gravel it's just not for me. I'll be putting a FD on my Sequoia soon as I find a 2x crankset in the proper length for my preference that fits the wider spacing needed for the wider tire clearence. Does anyone feel similarly?
Use the following 1x gearing and it will change your mind...

Launardi 9-36 cassette
40/42/44 chainring

This setup will work on the road and gravel with smooth transitions between gears...and it's lighter than a 10-42 setup.


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Last edited by sholiday on Fri Apr 13, 2018 4:12 pm, edited 1 time in total.
Parlee Z3 4.94kg: viewtopic.php?f=10&t=101920
Wilier Cento Uno SL 5.52kg: viewtopic.php?f=10&t=101957

sholiday
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by sholiday

wheelsONfire wrote:I agree with you. If i would express what i think of 1*11, it's for commuter bikes or fast city bikes (Alfine 1*11 comes to mind)

I ride my gravel on most terrains except from what i feel is too much for the bike to handle.
After all, it's not a MTB.

I would never convert to 1*11.
I wonder if this grew from the fact that road bike groupsets is made for 43.5mm chainline.
A 12*142 frame, the cassette works best if chainline is wider.

When i used Shimano UL 6800 crank and 44/33 or just a Shimano 34T small chainring, the chain jumped inboards every single ride.
I tried just about everything when i simply started to let it sunk in, it's the chainline that is off.

If you think about it, no manufacturer has cared for 2*11 gravel or CX specific groupset.
It's to niche at the moment, to little money in it for them to invest.

I think this is why Sram introduced 1*11. It was the easiest solution aswell as the least costly.

To sort my issue, i decided to try what i now use.
So now i use Easton EC90 crank and axle, a custom made 110bcd spider from Kent Eriksen cycles (made for a wider chainline then standard Easton 4 bolt) and Wickwerks 44/34 chainrings.
Grinded my Di2 FD 6800 cage to better fit 46-44T chainrings diameter aswell as getting the inside of the cage, to be closer to the small chainring.
Also use Sugino MT-OX to lower the FD.
No frame has drilled holes so you can lower your FD enough to handle so small chainrings.
With the Sugino adapter, it's perfect.
The chainline is around 47mm.

IMO, no 1*11 can cover the spread you'd use for speed on tarmac, easy going gravel, really messy gravel and trails.
I even run Sram PG-1170 11-36 at my 650B wheelset and Shimano cs-hg 8000 11-34 on my 700C wheelset.

Took of Wolf tooth Roadlink and drilled a new hole for the RD tension spring. It is better shifting then with Roadlink installed and i easily use up to 36T in the rear.
I have same setting for 11-34 as with 11-34 (B-screw is taken off).

It was expensive to get the complete crankset and the MT-OX adapter. But you can have it work if you want to.
This way, you have much more linear ratio instead of the crude 1*11.
The complete crankset is 544 grams and 6800 crank with 44/33 is 691 grams.

Just wait a few years when true CX/ gravel groupsets come, then you will read how much better it is than 1*11.

You are 100% wrong about no 1x gearing will get you the spread you need...

Launardi 9-36 cassette with small ratios
Pair with either 42 or 44 chainring provides the spread


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Parlee Z3 4.94kg: viewtopic.php?f=10&t=101920
Wilier Cento Uno SL 5.52kg: viewtopic.php?f=10&t=101957

sholiday
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Location: San Luis Obispo, CA

by sholiday

HaroldC wrote:I’m currently running Compass Barlow Pass tires with Challenge CX latex tubes. Feels amazing, similar to tubeless. I’m not entirely sold on tubeless for gravel yet. Was running Orange Seal and it couldn’t seal up a 1/4” slice in the tread. Leaked everywhere and made a huge mess when I had to run a tube. Might eventually give Orange Seal Endurance or Stan’s Race a try.
Use Caffe Latex...nothing is better. I run Compass Switchback Hill with it and they ride like tubulars


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Parlee Z3 4.94kg: viewtopic.php?f=10&t=101920
Wilier Cento Uno SL 5.52kg: viewtopic.php?f=10&t=101957

sholiday
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Location: San Luis Obispo, CA

by sholiday

reippuert wrote:
ProfessorChaos wrote:
Tue Nov 07, 2017 2:32 pm
I recently aquired my second 1X Sram Force gravel bike, this one is a Specialized Sequoia, and the last one was a Diverge. I planned to put Force 22 on the Diverge, but never did. I have most of the parts here ready to install on the new bike. For me the 1x drivetrain just has too big of gaps between the gears with the 11-42 cassette. I replaced the cassette with a 11-25, and the RD with a short cage Force, and it feels noticably less drag in the drivetrain as well. Which makes since with bigger cogs having more teeth would be more contact points on the chain, and more contact would be more friction.

Don't get me wrong I love my
1x mtbs, but for road, and now gravel it's just not for me. I'll be putting a FD on my Sequoia soon as I find a 2x crankset in the proper length for my preference that fits the wider spacing needed for the wider tire clearence. Does anyone feel similarly?
Nope, 1x is useless for long mixed surface rides - it may provide lowend and decent range but jumps are way too high, especialy when going fast. Jump bewten the 3 smallest cogs (10-12-14t or 11-13-15 are way too high for crusing and finding a decent cadance.

Give me 2x10 on 13-14-15-17-19-21-24-28-32-36 with 50/34 with 32-35mm tyres.
or a reduced/modded. Shimano 11 speed 2x10: 14-15-17-19-21-24-27-31-35-40 with 50/34 on 40-45mm tyres - lowend jumps on the later are seriously nice.

Obs - you need cogs from a cs6600 junior casette (+10 speed spacers) to mod shimano 11/36 and 11/40 casettes to build a decent cassette.
Im surprised no one is yet to offer a decent gravel/adventure/touring casette (wide range with tight top). SRAM 1:1 type 2.2 long gage rear derailure rules as they can be used with both SRAM and Campy road shiters and has a clutch (10 speed as long as you use a 10 speed HG casette spaceing).

Best cassette for 1x is Launardi 9-36...small jumps but you get both low and high end covered. Depending on wheel size and terrain pair it with either 40/42/44 chainring.


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wheelsONfire
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by wheelsONfire

The Leonardi cassette, 9-36, is it for Road freehub bodies?
Part from that, darn expensive :shock:
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Marin
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by Marin

It won't fit a Shimano freehub, 11t is the smallest possible cog. Everything with 10 or 9t needs an XD driver.

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