I have been given a Phil & Teds sport, is that the same as a classic?! One rear wheel has been replaced so one is smaller than the other, plus the small one seems slightly misaligned or warped. Possibly because of this the brake keeps pinging on as I walk around. Unfortunately both rear wheels won't come off so I can't fix/replace the dodgy wheel. Any ideas?! Am not sure how old it is or what it's worth so not sure how much time/effort/money to put into repairing it. DC 2 due in 5 weeks! Thanks in advance