Why don't Shimano have a gear readout on their displays? The software knows speed and cadance so it's an easy calcultion and would be useful when approaching obstacles, junctions, knarly bits etc. Nothing worse than being in too high or low gear and struggling to get the right one when it's too late.
Why no gear indicator?
- Thread starter TimC7
- Start date
Don’t you get a feel for the right speed to be approaching an obstacle etc by how hard or easy it is to pedal?
I’m not sure how a gear indicator would help me to be honest, even from when my Raleigh chopper had a display to tell me which of the 3 gears I was in!
It either ‘feels’ right for what I’m about to ride over/up/around or through and if it doesn’t I change gear.
I’m not sure how a gear indicator would help me to be honest, even from when my Raleigh chopper had a display to tell me which of the 3 gears I was in!
It either ‘feels’ right for what I’m about to ride over/up/around or through and if it doesn’t I change gear.
- Thread starter
- #3
Often that is the casei, but if the approach is slightly downhill and coasting, or slower/faster because of the trail just before it's easy to be wrong on unfamiliar stuff. Seems such a simple and useful thing to have displayed for free rather than cadence (who cares), speed (irrelevant) or elapsed time (pointless).
I was thinking this today actually. Had to do some road riding and kept hitting the limiter in turbo. Then I realised if I dropped into eco, by the time I hit the limiter, I was in a lower gear and able to push past the limiter and work the gears up to about 25mph. As I was pissing around trying to figure out the best way get up to speed I thought an indicator would be handy.
Also, the kiox suggests when to shift, why can’t it tell my Axs instead of me?
Also, the kiox suggests when to shift, why can’t it tell my Axs instead of me?
militantmandy
Well-known member
If you've got the spare time to check a display on your bars whilst riding a trail, maybe you need to speed up a bit!If you haven't got the spare mental capacity to check then maybe you should slow down a bit
Probably because it's not really needed. You just go by feel, that how bikes have worked for decades. How do you even know that say 5th gear, is even the right gear? You just pedal, and you feel the resistance and shift accordingly. I've never felt the need for an indicator.
If you really need it just get the new Shimano auto shift system.
Montana St Alum
Active member
It's available on Shimano shifters. I don't need it on my E-Bike, but on my mountain bike I like to keep track when riding with my wife. It allows me to consistently set a nice pace based on her needs. As she just turned 70, (I'm 71) that is handy . By setting a good sustainable HR pace for her, it improves her chances for success and reduces the need for her to rest as much. My fitness level is higher than hers, so having the data on which gears I'm in and keeping an appropriate cadence helps control her heart rate. Having said that, I'm using AXS, so I just look down at my cassette ring to confirm the gear I'm in, but an indicator would be handy for sure in many applications.
They do. But it only works when you have a Di2 derailleur as that's the only way it can know definitively what gear you're in. If you don't have Di2 it just shows 'M' (which I'd guess is for Manual?)
Montana St Alum
Active member
There is a small mechanical window attachment that you can put on the mechanical shifter on Shimano if you want.
bike.shimano.com
I just set cadence by feel.
SL-M780-R | SHIMANO BIKE-EU
bike.shimano.com
I just set cadence by feel.
Haveland
Active member
I enjoy seeing what gear I'm in on my AXS drivetrain. I keep it on my Garmin display.
Why is it useful? Mostly for when I'm stopped or descending for a while. It is handy to be able to see and also is useful with an ebike since you are one step removed from the feel due to the motor input.
Do I need it? Certainly not but do I like it, yup. Am I missing it on my other bikes not super but do find it would be useful.
Why is it useful? Mostly for when I'm stopped or descending for a while. It is handy to be able to see and also is useful with an ebike since you are one step removed from the feel due to the motor input.
Do I need it? Certainly not but do I like it, yup. Am I missing it on my other bikes not super but do find it would be useful.
Montana St Alum
Active member
13Km/hr /RPM in your head. Or look down at the cassette.
When you drive your car you don’t look down to see what gear your in, you just know when to shift. 
RiderOnTheStorm
E*POWAH Master
Actually if I recall it's:
gear ratio = speed / (wheel circumference x cadence)
With gear ratio = chainring cogs / cassette cogs
So, to determine which sproket you're on, you can do the maths as follows
, or better yet, look down on the cassette!T = R x W x C x 60 / (S x 1000)
With
T: cassette sproket number of teeth
R: chainring number of teeth e.g 34 teeth
W: wheel circumference in Meter. E.g 2.32m for a 29" mtb wheel
C: pedalling cadence in RPM e.g 100 RPM
S: bike speed in km/h, e.g 20km/h
With the above example, the calculation would give:
T = 34x2.32x100x60 / 20×1000
T = 23.8 teeth
On a SRAM GX 10-52T cassette with the following sprokets: 10, 12, 14, 16, 18, 21, 24, 28, 32, 36, 42, 52
And with Gear 1 being the largest 52 teeth sproket, you would most likely be riding in Gear 6 (24 teeth)
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Paulquattro
E*POWAH Elite
Exactly my thoughtsWhen you drive your car you don’t look down to see what gear your in, you just know when to shift.
The thread should read "Why a gear indicator ?"
I've always associated them with children to save asking there parents what gear there in when out for a ride .
Haveland
Active member
I'd agree, but also, at a stop, how many times do you check that you are in first stillWhen you drive your car you don’t look down to see what gear your in, you just know when to shift.
That is why I like seeing on my Garmin what gear I'm in. Needed no.. nice to have, yes.
Select the gear that gives the desired cadence for the current conditions, what number that gear happens to be is irrelevant (imo).
Exactly my thoughts
The thread should read "Why a gear indicator ?"
I've always associated them with children to save asking there parents what gear there in when out for a ride .
Ha ha... I was out with my 8 year old daughter on Saturday riding some fairly basic trails. I'd be shouting back to her "there's a steep bit coming, put it in 2" so she was prepared!! Gripshift with a 1-7 indicator
I have my AXS derailleur position displayed on my Garmin. I find it useful for when I'm away to fly down the singletrack. Generally 8 is the gear I pick. Usually it's uphill in 2/3/4 to get to the downhill part, quick shift into 8, and then off I go!
I'd agree, but also, at a stop, how many times do you check that you are in first still
Uhhh…never?
The cadence indication is useful if you know your motors ideal input speed for maximum torque, but after a while you get to know it by feel anyway.
Cadence is useful information even if the bike does not have a motor.
The OP is about knowing what sprocket is engaged, in situations when looking down or spinning the cranks are not possible, alas “technical terrain”…
Even if one considers it logical to do the maths while riding, why not have the computer do it?!
The OP is about knowing what sprocket is engaged, in situations when looking down or spinning the cranks are not possible, alas “technical terrain”…
Even if one considers it logical to do the maths while riding, why not have the computer do it?!
steve_sordy
Wedding Crasher
What gear am in?
The usual, Shimano AM42 shoes, Endura socks, Shimano Ranger trousers, Shimano long sleeved top, Specialized gloves, Bell Super 3R helmet and Oakley Straightjacket specs, Merino underwear.
The usual, Shimano AM42 shoes, Endura socks, Shimano Ranger trousers, Shimano long sleeved top, Specialized gloves, Bell Super 3R helmet and Oakley Straightjacket specs, Merino underwear.
- Thread starter
- #26
I guess, if you just ride flat trails looking at the view . .Exactly my thoughts
The thread should read "Why a gear indicator ?"
I've always associated them with children to save asking there parents what gear there in when out for a ride .
Only if you know what size cassette, chainring and wheel size you're running. These are easily changed so the computer would be making assumptions that could be wrong.
But I will say I'm not sure why people are replying to tell you that you shouldn't want it, don't need it etc. It's up to you - if that's something that you'll find useful then that's fine. But you'll just need to get Di2 to have it
RiderOnTheStorm
E*POWAH Master
How 'bout the shimano grip shifter? The RevoShift twist shifter as they call it.
Wanna know the gear you're in? The quick dial on the grip shows the gear number. Not sure though how suitable or reliable these would be for eMTB use!!
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Paulquattro
E*POWAH Elite
Well you plainly do, if you have time to look at a gear indicator when your out riding .
Last edited:
Sounds lovely. This was why I was a rubbish road cyclist, too much time looking at the view rather than focusing intently on the tarmac inch’s in front of me
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