Bones, M-15 owner here in Sacramento. Do you keep your spare covered with one of those cheap tire covers? I also keep the South facing trailer tire covered with an old garbage can (roughneck) cover wired in place. Makes a great home for spiders too. Just my DM 00.02 pfennigs worth......Larry in Old 189 by Jerry M. -----Original Message----- From: montgomery_boats-bounces@mailman.xmission.com [mailto:montgomery_boats-bounces@mailman.xmission.com] On Behalf Of bownez@juno.com Sent: Wednesday, September 25, 2013 5:57 AM To: montgomery_boats@mailman.xmission.com Subject: Re: M_Boats: Trailer Tire Sidewall Cracks Hi Rich, Time to replace. This spring, we had to replace the spare on a 16 foot fishing boat before driving to Canada. The tire would not hold air due to sidewall cracks. It had never touched the road! UV took her life. I believe I have radial tires on my M17 trailer. It probably makes little difference. Bones ____________________________________________________________ Do THIS before eating carbs (every time) 1 EASY tip to increase fat-burning, lower blood sugar & decrease fat storage http://thirdpartyoffers.juno.com/TGL3141/5242ddc28b6fe5dc2232fst02vuc