Puzzling noise

Ezy Rider

When Im on my roadbike on flats or climbs and i have to get out of the saddle and sway the bike from side to side as you do, I get this clanking sound while i pedal that isnt there when Im sitting and pedalling. Ive tightened any allen bolts at the crank and seatpost, but yet it persists. One thing I noticed is that some of the spokes on my rear wheel have lost some tension and stiffness and im thinking of taking it to lbs to have them re-tensioned, wheel is running true though.Im puzzled as to what could be causing the noise which occurs during the pedalling and swaying motion only..................any thoughts ?

ara3791

I've had the same issue in both front and rear wheels. The front wheel would make a pinging noise whilst the back wheel a dunk dunk dunk etc.... Both issues were down to spoke tension. And would only occur when out the saddle.

Wirral_paul

If the spokes have lost tension then i'd say get them re-tensioned and the wheel trued properly asap. Sometimes the spokes may move against each other when loose but i wouldnt call this a clanking noise. Still - it puts extra load on the tighter spokes so best to sort it out asap.

thescouselander

Noises can be tricky to track down and can often come from the places you least suspect. In this case I'd say there's a good chance the noise is coming from the handle bars / headset area.

sfichele

I had a similar noise. In my case turned out that the speed-sensor on my front forks had been knocked inwards sightly whilst cleaning. During normal, seated riding I had no noise. However, out of the saddle the flex in the forks meant the speed-sensor was hitting the magnet on the wheel.

Ezy Rider

im taking the back wheel to lbs in the morning to have the spokes re-tensioned, what is a ballpark uk price for this job ?

Duffer65

Between £10 - £20, depends on the LBS if you're friendly with the staff in yours it may be £10 - £15.

Pru

Make sure your stem isn't over-tightened to the fork steerer, it's surprising the noises that that can make.

Ezy Rider

popped out this evening and moved the wireless transmitter further out from the path of the magnet and the clicking is still there. i only get the noise whenim outta the saddle and the bike is rocking from side to side when i pedal :shock: to me it sounds like its coming from behind me,but im not sure. are the obvious areas to focus on :

the loose spokes i know i have on rear wheel, a few are very slack

the crank ? but its only been on about 3 months and was purchased new, its a 50/34 shimano compact

the cleats, i use spd pedals and shoes and my cleats have been on about 2.5 years

i suppose "clanking" might not be 100% accurate, when i get my bum outta the seat , sway the bike and pedal then there is a very obvious click about once per revolution.

im stumped :shock: and it seems to occur as im putting the weight through my right foot

woodywmb

The spokes need tensioned. The wheel is always being pulled to one side when you push hard on the cranks because the gearing is all down one side of the bike. Spokes are positioned and tightened to compensate for the pull - but through time they slacken and the wheel doesn't run true, made obvious by clunking sounds when you hammer the pedals. Ask the shop to let you see the wheel being trued - interesting to watch an expert at work.

keef66

Do you have a seat pack?

noodleman

I had a similar sound a while back. When I was out of the saddle stomping on the pedals I got a clunking type of sound.
Tried everything with no joy, until I tightened the lockring on the freehub/cassette. That stopped it.
Might be worth a try.

One Man And His Bike

Stanley222 wrote:

Could be the cleats!

This.

Wirral_paul

Funniest answer would be the right crank catching the end of the front mech cable!! Never done this myself obviously!!

If once per pedal rev then need to check cleats, pedal mechanism, pedal to crank, crank bolt torque, chain ring bolts, bottom bracket bearings. Could be anywhere in that lot to be honest

ShutUpLegs

Wirral_Paul wrote:

Funniest answer would be the right crank catching the end of the front mech cable!! Never done this myself obviously!!

If once per pedal rev then need to check cleats, pedal mechanism, pedal to crank, crank bolt torque, chain ring bolts, bottom bracket bearings. Could be anywhere in that lot to be honest

I wonder if this was ever cured?

rozzer32

Check the little bits of rubber on the side of your tyres isn't hitting your chain stay or forks.

I mean the bit that is next to the yellow in the pic below.

Pross

Maybe it was the sound of his previous decals coming off and it has now been solved

joshr96

Sounds like a loose bearing. Check the hubs on the wheels that might be conclusive. 8)

Dafo

Bet it'll be something like this:

http://www.youtube.com/watch?v=JF-KJ5-KNQk

MickTup

Also try greasing your wheel skewers that's what my noise was it took ages to fathom it out and that only happened out of the saddle

ShutUpLegs

Sum gud advice 'ere