Clicking rear wheel?

Jordjuan

Hi all,

Just bought my first road bike earlier today. picked up a secondhand giant defy 1 for what seemed like a reasonable price.

Have noticed that the back wheel clicks when spinning, only when not peddling though.

Have also noticed that the shifter for the front crank seems to be for a triple, but the bike is only a double? Doesn't seem to cause any issues, but does take two clicks to go onto the lower ring. Will this cause any issues?

If anyone could help with the above, that would be great!

Cheers,

Jordan

arlowood

Not sure what you mean by clicking. You do realise that some hubs have quite a noisy freewheel so the clicking could just be the noise from the freewheel. You will only hear it when you stop pedalling.

What groups etc do you have. With many modern front derailleurs (certainly Shimano) there is a trim function that will feel like 2 clicks when going from big chain ring to small.

Jordjuan

arlowood wrote:

Not sure what you mean by clicking. You do realise that some hubs have quite a noisy freewheel so the clicking could just be the noise from the freewheel. You will only hear it when you stop pedalling.

What groups etc do you have. With many modern front derailleurs (certainly Shimano) there is a trim function that will feel like 2 clicks when going from big chain ring to small.

Had just finished reading that the noise is pretty normal, had panicked as figured it meant something was rubbing, but it would appear not. The wheelset is a campagnolo scirocco and it's a 105 groupset!

What does the trim function do? (sorry, pretty clueless when it comes to bikes) The first click when trying to change down to the smaller ring does nothing, then the second takes it down, doesn't seem to cause any issues, but wanted to check it's not abnormal!

ryan93

Hi Jordan,

I think as arlowood said, and you found out yourself, the noise from the rear wheel is likely to be the pawls in the freehub passing over the ratchet teeth in your hub shell. In some hubs this noise is much louder than other.

The trim function on your shifter allows you to make a small adjustment to the position of the front mech (derailleur). Often when riding in your big chain ring and the biggest cassette sprockets (by biggest I mean in physical size, nothing to do with easy or hard gears) the chain is at an angle and can rub off the inside derailleur cage plate. The first click at the shifter moves the front mech inwards to stop the rubbing. Similarly, if you're in the small chain ring and small cassette sprockets the chain will often rub on the outside cage plate. The first click before moving the chain into the big chain ring should help alleviate this as it moves the cage plates outwards just enough that the chain should pass through the front mech without rubbing the cage plates.