biker vs wheeler

biker and wheeler both are nouns.

Word	Noun	Adjective	Verb	Adverb
biker	Yes	No	No	No
wheeler	Yes	No	No	No

As nouns, biker and wheeler are synonyms defined as:

Other synonyms of biker include bicycler, bicyclist, cyclist.

biker (noun)	wheeler (noun)
a person who rides a bicycle	a draft horse harnessed behind others and nearest the wheels of a vehicle
	someone who makes and repairs wooden wheels
	a person who rides a bicycle
	the man at the outermost end of the rank in wheeling