I've read just about everything I can find on the Heidenau K60 tires and there seems to be a bit of disparity in the performance and mileage people are getting out of them, so I thought I would seek some advice more specific to my situation. I'm trying to avoid carrying a rear tire if at all possible. I'm doing a 10K+ trip from Minneapolis to Costa Rica - via Baja. I plan on riding to Texas, then over to San Diego - probably all pavement with the potential for some maintained gravel roads. I'm on a f800 GSA, riding solo at 160lbs for myself and camping, maintenance and gear somewhere around 100lbs+. I'm running the stock Pirelli Scorpions currently, but once I get into Baja I plan on doing mostly gravel roads (40/60), back on mainland Mexico to Costa Rica I'll probably be more 50/50 - but will be seeking gravel roads (no off-road). I'm an expert off-roader, but I will be loaded and don't want to push it by going into the unknown. So currently I'm thinking I should ship a pair of Heidenau K60's to San Diego - that takes 2K off the K60s, then have the Pirelli shipped back to a friend in TX for the return trip - shaving another 1K back home. That would be about 8K+- on the K60's. With all that in mind, I've read that the K60's are not so good in sand - which I'm sure to encounter in Baja. I'm thinking I can make them work, giving me the best of all things - but I'm willing to switch out the front for a knobby and deal with carrying another front for later in the trip - or could use some advice on buying tires in Central America. I'm open to all options, just looking for some experienced riders to weigh-in on how they would handle things. Also, advice on heavy duty tubes and whether to install sealant or carry some along. Thanks.