Usually, but not always, a speeding violation will not make you inadmissible to Canada. In order to be considered a criminal conviction in Canada, an offence must violate federal legislation such as the Criminal Code of Canada. Traffic violations generally fall under the jurisdiction of the Provincial governments in Canada and therefore are not considered criminal convictions. However, if someone has been convicted of the equivalent of reckless or negligent driving, this can be considered a criminal offence in Canada and might make this person inadmissible to Canada.
Another reference
http://laws-lois.justice.gc.ca/eng/acts/I-2.5/page-8.html#h-23
Section 36 part 2. Since you did not get convicted of a criminal offence (you don't have criminal record) then it means you are absolutely OK.