after getting all brake pads and calipers, and 2 wheel bearing one in the front one in the back. the abs kicks in even when im going slow on barely any snow ice, or gravel/sand. My wheels are under a year old. cant anyone give me a suggestion. The mechanic was a small town, very nice guy and always does a great job. Could it be a mistake he made or possibly something else.

Thanks in advance

 

It could be the flux capacitor leaking gamma rays. But more seriously, I can only think that one of the front calipers hasn't been tightened and is giving the effect of the ABS activating. Is the ABS/Traction control illuminated?