Hissing noise on pedal downstroke
12-12-13, 10:22 AM
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Hissing noise on pedal downstroke
It only happens on the left pedal when I am pushing hard or out of the saddle, sprinting or going up a hill. When I spin the wheel while the bike is stationary there is no rubbing against the brakes at all and there seems to be a decent amount of clearance on both sides so I don't think that's the issue. I don't know what else it could be though. Could it be a small amount of air being pressed out of the tires on each downstroke when I apply a lot of power? My tires are inflated to about 100-110psi when I am outside. I weigh about 165 lbs.
12-12-13, 10:31 AM
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Two theories:
1) Very slight brake rub under high load. Sounds very like a slight exhale, IMO.
2) A NY brown water snake has taken up residence in your left chain stay. Of the indigenous snakes, they are the most common hissers. Occasionally referred to as a "Water Moccasin", they are neither related to the venomous snake of that name or to wet leather loafers.
1) Very slight brake rub under high load. Sounds very like a slight exhale, IMO.
2) A NY brown water snake has taken up residence in your left chain stay. Of the indigenous snakes, they are the most common hissers. Occasionally referred to as a "Water Moccasin", they are neither related to the venomous snake of that name or to wet leather loafers.
12-12-13, 12:16 PM
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If your bike was made outside the U.S.A., it will have a built-in Hisser.
Use a 3mm hex wrench to take it off.
Make sure you put the hex screw back in, or you will have a Whooshing noise.
s
Use a 3mm hex wrench to take it off.
Make sure you put the hex screw back in, or you will have a Whooshing noise.
s
12-12-13, 01:20 PM
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Rear brake rubbing. Flip the release on the caliper to give the pads more room and try again.
I'm sure you produce mad crazy watts, but you're not powering the air out of the tires.
I'm sure you produce mad crazy watts, but you're not powering the air out of the tires.
12-12-13, 01:25 PM
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Originally Posted by RollCNY
Two theories:
1) Very slight brake rub under high load. Sounds very like a slight exhale, IMO.
2) A NY brown water snake has taken up residence in your left chain stay. Of the indigenous snakes, they are the most common hissers. Occasionally referred to as a "Water Moccasin", they are neither related to the venomous snake of that name or to wet leather loafers.
1) Very slight brake rub under high load. Sounds very like a slight exhale, IMO.
2) A NY brown water snake has taken up residence in your left chain stay. Of the indigenous snakes, they are the most common hissers. Occasionally referred to as a "Water Moccasin", they are neither related to the venomous snake of that name or to wet leather loafers.
I had this same problem and it was a brown water snake. Very common.
