They are biking from Newtown to Washington to send a message. Twenty-six cyclists are riding more than 400 miles in support of what they describe as common-sense solutions to prevent gun violence. There is one rider for each victim of December’s mass shooting at Sandy Hook Elementary School, in which 20 children and six educators were gunned down. Senator Richard Blumenthal of Connecticut calls the ride a ‘‘rolling rally’’ against special interests, particularly the National Rifle Association. The riders are expected to arrive at Capitol Hill on Tuesday. Blumenthal says the Judiciary Committee is expected to meet next week to evaluate changes to gun laws.