Author Topic: Going from 3x10 to 11x1  (Read 3931 times)

Boazws

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Going from 3x10 to 11x1
« on: January 30, 2022, 11:27:24 PM »
Recently I've ordered a Nomad MK3. Wanting to spare myself the hustle of 3 chainrings, I asked for a 1x11 groupset. The chainring is 32t and the sprocket is 11-42.
Has anyone had any experience with such a rig? I haven't got my bike yet (due in April), but would love to hear other users' experience. Thanks.

mickeg

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Re: Going from 3x10 to 11x1
« Reply #1 on: January 31, 2022, 01:55:16 AM »
I do not have any experience with a 1X system.  With that cassette, you have a range of 382 percent.

My road bike with a compact double has a range of 355 percent, slightly less than your planned bike.

But my rando bike with a triple has a range of 504 percent.  My Nomad Mk II with Rohloff a range of 526 percent.  My two derailleur touring bikes with triples have a range of 558 percent.

I would not want to tour with a range as narrow as yours, but if you want to tour with that narrow of a range, that is your call.

martinf

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Re: Going from 3x10 to 11x1
« Reply #2 on: January 31, 2022, 08:59:50 AM »
Your planned setup gives 11 gears from (about) 19" to 74".

My current touring setup is Rohloff with 14 gears from 17" to 88", but I rarely use gear 14, so 17" to  the second highest gear 78" would certainly be OK for me on tour.

On my last derailleur-bike tour I had a 3x7 setup with about 12 non-duplicated gears from 18" to 86", and I could easily have done without the 86", though I did use the second highest gear (76").

So I reckon OK for loaded touring, so long as you are prepared (like me) to do without high gears. And the rapid wear probable with an 11T sprocket and 32T chainring.

Lonerider

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Re: Going from 3x10 to 11x1
« Reply #3 on: January 31, 2022, 10:04:11 AM »
I have a Ridley X-Trail with 1x11 groupset. It came with a SRAM Apex-1 groupset and was fine for a while. Problems set-in after a few months. It was very difficult to set-up the gears. I could use either the smallest 10 rings or the biggest 10 rings. Never all 11. It wasn't just me, three of my LBSs tried and failed. In the end the groupset was returned to SRAM, under warranty, for replacement. The new one went the same way. The last LBS suspected that it was a problem with the spring in the derailleur and the comparatively big jump into the biggest ring. Also, the largest ring on the cassette is made of a different material to the rest of the cassette and an 'add on'. That may cause an issue. I now have a Shimano GRX 1x11. I frequently have to adjust the gears to make that last 'jump', but when indexed correctly, it is very slick. Another issue I had with the SRAM was that gear changes were all done using one lever. One click, or two clicks, depending on the direction of travel on the cassette. Hence my new bike having a Rohloff!

Having pointed out the pitfalls experienced I can say that, when set-up correctly, 1x11 works very well. Mine is 42 chainring with the 11 to 42 Cassette. The 1 to 1 at 42 can be quite challenging on some terrain but is a good multi-purpose set-up and meets my requirements.


PH

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Re: Going from 3x10 to 11x1
« Reply #4 on: January 31, 2022, 10:06:58 AM »
Welcome to the forum, hope the new bike is everything you wish for.
Whether the gear range is wide enough for you will depend on your fitness, preferences, riding style and intended use, it wouldn't suit me, but it isn't my new bike!  We can't know the exact gear range without knowing the wheel size, though I expect the estimates above are a good estimate.  On one bike I'll spend a good bit of time in higher gears than you have, on another bike I'm sometimes in gears lower than you'll have - Other people have ridden round the World with narrower ranges (At one time the record was held by someone who used an Alfine 8 speed hub)
Getting the range you have on a 1X system has required some compromise, the ones I've looked at have big gaps at both extremes in order to get reasonable gaps with the most used middle section (Comparable to Rohloff's 13% steps, though still quite big compared to a road triple). I've had gearing like that, it's OK but often the gap between top and one down had me looking for something in between and at the other end once I'd dropped down to first, I was stuck there till the crest of the hill.  Those I ride with who have similar 1X 11 speed do like the simplicity, there's no issues with shifting, even under considerable load.  Durability has been compromised to get that to all play well, the chains are flexible to maximise the efficiency and wear accordingly.  Thankfully the price of big cassettes has dropped, but they're still not cheap, a good chain measuring regime would be worth establishing to preserve them.
Hope you've made the choice that suits you, but it isn't a disaster if it doesn't, it isn't like getting the bike wrong and the new Nomad is one of the most versatile frames around.
Enjoy

mickeg

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Re: Going from 3x10 to 11x1
« Reply #5 on: January 31, 2022, 10:16:27 AM »
To elaborate a bit more on my gearing on a couple of my bikes.

This bike is predominantly intended for endurance riding, long distances, pavement (tarmac), minimal extra weight on the bike in a handlebar bag and saddle bag.  This website does a great job of plotting up gear ratios.
https://gear-calculator.com/?GR=DERS&KB=30,42,52&RZ=11,12,14,16,18,21,26,32&UF=2140&TF=72&SL=2.2&UN=MPH&DV=teeth

The above gearing is with eight speed 11/32 Sram cassette, road triple of 52/42/30.  I try to avoid using the two most cross chained gears with each chainring, thus effectively 18 gears.  I only use the two highest gears on shallow downhills, those gears are too high for use on flat ground, but I still like to have them for when I am going down into a valley and I want to maintain momentum for when I start up the other side of the hill.

I am in USA, I think in inches for length units.  If you prefer to think in terms of meters of development instead of gear inches, you can change that at the bottom where units has a couple circles to click.

My derailleur touring bikes use the same eight speed cassette, but the smallest chainring is 24 and largest chainring is 46.  I often ride one of these bikes with minimal weight on it, but the gearing is intended for carrying a light to moderate load of camping gear.

I think it is an issue of what you want to use the bike for.  Being a Nomad, I assume for carrying heavy loads for bike touring.  My Nomad Mk II with a Rohloff has this gearing for when I am touring with heavy loads.
https://gear-calculator.com/?GR=RLSH&KB=36&RZ=16&UF=2120&TF=72&SL=2.6&UN=MPH&DV=teeth

That gearing is low enough for me for steeper hills, although some people prefer lower gearing for the steepest hills.  But I spin out on the shallow downhills, so I wish I had some higher gears.  That said, the uphill gears are a higher priority than the downhill gears, so I am not making any changes to obtain higher gears, as to do so would cost me on the other end.

JohnR

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Re: Going from 3x10 to 11x1
« Reply #6 on: January 31, 2022, 03:26:21 PM »
When I got fed up with a 3 x 9 setup I quickly figured out that the only way forward was a Rohloff. Mechanically simple (on the outside), easy to maintain (do the recommended oil changes), 14 sequential and evenly spaced gear steps, low chain wear, easy to change the overall gearing ratio and, for less mess, compatible with a Hebie Chainglider. It comes at a cost, but it's worth it.

I'm currently using 42 + 17 (about 18 - 100 gear inches by my reckoning) but that's for general recreational cycling and I would want lower gearing should I add a couple of loaded panniers.

martinf

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Re: Going from 3x10 to 11x1
« Reply #7 on: January 31, 2022, 06:36:25 PM »
I think it is an issue of what you want to use the bike for.  Being a Nomad, I assume for carrying heavy loads for bike touring.  My Nomad Mk II with a Rohloff has this gearing for when I am touring with heavy loads.
https://gear-calculator.com/?GR=RLSH&KB=36&RZ=16&UF=2120&TF=72&SL=2.6&UN=MPH&DV=teeth

That gearing is low enough for me for steeper hills, although some people prefer lower gearing for the steepest hills.  But I spin out on the shallow downhills, so I wish I had some higher gears.  That said, the uphill gears are a higher priority than the downhill gears, so I am not making any changes to obtain higher gears, as to do so would cost me on the other end.

Almost identical gearing to my touring bike, the 57 mm tyres more or less cancel out my slightly larger 38T chainring.

The main difference is cadence. Mickeg has noted 72, and I reckon I am on an average of 90, mainly because I use 150 mm cranks.

That difference means I notice the lack of high gears less, as in a given gear I am generally going faster.

I find it easier to change cadence with the short cranks. If necessary I can go up to about 120 if I need/want to go faster than usual for a short period of time.

And on really steep hills I can drop cadence right down to about 40 if I run out of low gears, for example if using one of my bikes with 5 speed hub gears and range 225%, although I far prefer to gear down and keep my cadence up.

mickeg

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Re: Going from 3x10 to 11x1
« Reply #8 on: January 31, 2022, 08:20:04 PM »
...
I'm currently using 42 + 17 (about 18 - 100 gear inches by my reckoning) but that's for general recreational cycling and I would want lower gearing should I add a couple of loaded panniers.

Touring, I use a 36T chainring and 16T sprocket.  But for an unladen bike near home I use a 44T chainring and the same 16T sprocket.  Need four more chain links for the change.

For the hills near home and bike weight that never carries more than a pannier of groceries from the store, that bigger chainring and sprocket combination is perfect for everything from uphills to downhills.  Range is from 19.8 to 104 gear inches.
https://gear-calculator.com/?GR=RLSH&KB=44&RZ=16&UF=2120&TF=72&SL=2.6&UN=MPH&DV=teeth

JohnR

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Re: Going from 3x10 to 11x1
« Reply #9 on: January 31, 2022, 09:14:18 PM »
...
I'm currently using 42 + 17 (about 18 - 100 gear inches by my reckoning) but that's for general recreational cycling and I would want lower gearing should I add a couple of loaded panniers.

Touring, I use a 36T chainring and 16T sprocket.  But for an unladen bike near home I use a 44T chainring and the same 16T sprocket.  Need four more chain links for the change.

For the hills near home and bike weight that never carries more than a pannier of groceries from the store, that bigger chainring and sprocket combination is perfect for everything from uphills to downhills.  Range is from 19.8 to 104 gear inches.
https://gear-calculator.com/?GR=RLSH&KB=44&RZ=16&UF=2120&TF=72&SL=2.6&UN=MPH&DV=teeth
I've just noticed that I had a mis-type - my numbers are 19 (not 18) to 100 gear inches which is consistent with yours but a little lower. I'm thinking of trying 42 + 16 which will give 20.2 to 106 - about 1/2 gear step higher - as I've got a 16T sprocket waiting until it's needed (I was envisaging 38 + 16 when age catches up with me).

Boazws

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Re: Going from 3x10 to 11x1
« Reply #10 on: January 31, 2022, 10:50:07 PM »
Thank you ball for your input.
Being a slow and somewhat rusty rider, it seemed that high gears weren't a priority for me, while some low gears would he welcome. At 61 YO I rather tour, not sprint.
Of course, if this rig won't work out for me I'll try some changes.
Will report once the bike is here and I bstart rolling.
Thx!