Hello, newbie here. I purchased my Spyder last year after getting my cycle endorsement. I have put on maybe 7000 miles total on the back tire. Not sure how many miles were on it beforehand. My question: I would like to replace the tire with something a little more substantial as it is bald in the middle and needs replaced asap. I am looking at the following: Altimax RT 43 215/60R15? Thanks in advance for the help and advice.