Technical > Transmission
Going from 3x10 to 11x1
mickeg:
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:
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:
--- Quote from: mickeg on January 31, 2022, 10:16:27 am ---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.
--- End quote ---
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:
--- Quote from: JohnR on January 31, 2022, 03:26:21 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.
--- End quote ---
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:
--- Quote from: mickeg on January 31, 2022, 08:20:04 pm ---
--- Quote from: JohnR on January 31, 2022, 03:26:21 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.
--- End quote ---
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
--- End quote ---
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).
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version