New answers tagged gears
4
It is possible to do a 2x to 1x conversion but as stated in other answers you generally need to do something to keep the chain on the chainring. Generally a narrow-wide chainring is used on 1x setups to retain the chain. Leaving the derailleur in can also accomplish this.
Re-using a double crank with a single biases the chainring to one side, ending up with ...
-3
I was thinking about going for a really large chainring at the front and removing the front mech
Don't. I have a bicycle without front derailleur.
If there is no front derailleur, when riding over a bump at high speed, the chain is at danger of falling from the chainring. This has happened to me.
Not only that, but the only way to get the chain back to the ...
13
This seems very much to be a case of freewheel/freehub pawls (the mechanism which allows the wheel to rotate without turning the cassette and pedals) sticking and not springing back into drive mode immediatly, after coasting.
You say when braking, but it might be when coasting or backpedaling before a corner, which happen alongside braking.
It usually ...
3
Gear 1-6 is a big jump - its roughly all the way up/down the cassette.
So I'm wondering if your bike's front mech is getting involved somehow. Does this happen equally when on the big chainring as on the small ring?
When you reach for the brake levers, is it possible your hands are accidentally actuating the shifters ? I would suspect not on a pod/trigger ...
8
That is not an intentional feature and it should not be happening.
Check to see if the chain is in fact moving onto a larger sprocket under braking. Find a area where you can ride safely in a straight line while looking down between your legs at the rear derailleur, hit the brakes and see what happens. Alternatively have a friend ride behind you and observe (...
2
First, it's not clear which gear you mean by "12th". Is it the largest or smallest one?
It sounds like your rear derailleur is not properly adjusted. As 11 of your 12 gears apparently work fine, it's most likely a problem with the limit screw for derailleur. It's probably not allowing the derailleur to travel far enough.
Park Tool has quite a few ...
2
Using the smallest chainring with the smallest sprocket or the largest chainring with the largest sprocket should indeed be avoided. It’s called “cross chaining”. It’s less efficient and causes slightly increased wear and noise. On the small-small combination it can cause chain slap (because the chain will be almost slack) and on the large-large combination ...
1
We know it worked once, but we don't know what was changed, so it's time to go back to basics.
Auto shifting
The rear derailleur has a spring that wants to move the chain to the smallest cog.
The shift lever should have enough friction to keep the derailleur spring from going where it wants but not be so tight that it won't move.
The first thing to check is ...
0
Sounds like the cable is pulling through the binder bolt on the derailleur, so that the shifter cannot pull the derailleur inboard onto the largest sprocket.
The shifter cable needs replacing. Check that the housing is properly located in all the frame stops. It would be good to put a ferrule on the end of the shift cable also.
It's possible that the ...
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