Strain? Severe pain in the right calves/ back shin

I bike too and I am also having this problem. My eventually lead to heal pain which is when I went to the doctor. I had to stop biking awhile and go to physical therapy. They are maging my calf three times per week because I have a knot or trigger point in my calf. The PT said that it was caused by my calf not relaxing itself enough after I rode. If you can not get to a PT then get someone else to give you a deep mage on the affected calf concentrate on any spots you feel knots. Also use heat unless it is swollen. They to rest it and it will feel better soon.