1st thing you need to do once your tires have been mounted, is check to see what the pressure is at... doesn't really matter @ this time... then take a piece of regular black-board caulk and run a line across each tire... now roll your SPYD3R forward, and keep rolling until the caulk marks are again visible... look where the caulk has been removed... if you have plenty of caulk on the edges, you have too much pressure... if the the caulk remains on the middle, your psi is too low...
note, that the best way to do this, is to load your SPYD3R the way you will ride it... if the majority of your riding is with 2 on-board, with lots of luggage, that's the way you want to do the caulk test....
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