Hi just wondering if there is anything i can do to stop my bike swaying off to one side when i go no hands.
I've had previous bikes which were centred perfectly and now my brand new Specialized sirrus always wants to go left..??
I know going no hands isn't a pressing issue but its nice once you've just tanked it up a hill!!
Thanks

Random thought: Are the wheels aligned in the dropouts correctly?

Also, is the road you're trying to ride on crowned? That might be a contributing factor...

This may help, but with a new bike it could be a manufacturing defect. https://draco.nac.uci.edu/rbfaq/FAQ/8e.1.html

Could be cable housing is too short, or pulling bars to left. if you hang the bike level on a workstand or rack, and center the bars, do you feel any pull to left or will bars stay centered?

thanks will have a look, roads were flat.
Tried lifting the front end up and the tendancy is to always fall to the left even with the bike leaning slightly to the right.!!??

My wife's bike did that until I put a tad more slack in the headset adjustment.

^My first thought, too.

Wheels that are not perfectly 'co-planar' (due to frame misalignment or an axle not properly seated in the dropout) will cause this. If the wheels are not fully seated in the dropouts then fix that. If the wheels are perfectly in the dropouts and the bike pulls to one side than something is happening that should not happen with a new bike (unless your bike has been crashed or crushed or something.

a headset that is too tight will often be difficult to ride no-handed. gyroscopic forces, I believe.

further reading: https://janheine.wordpress.com/2011/0...orks-together/

Bent frame, improperly dished wheel(s), wheels not in dropouts correctly, cables exerting a force on the steering, etc.

The first step to going no-hands is to feel it in your heart.

Once you've got that covered, then move on to wheel alignment and headset tightness etc...

In my experience, all roads are crowned. Maybe it's because I live in Canada? Is it different elsewhere?

I was testing my bent '77 Grand Prix like this last year and broke my right elbow going over a pot hole. If you notice this happening just put a straight solid object along the top tube, or place the bike on some kind of straight line on the ground (like tiles) and sight it, or take it to a mechanic.