Negative Positive
Title: this is the mount to buy if you have a mountain bike.
Review: I have the Garmin Etrex Vista HCx and the auxillary mount adapter that came in the box integrated perfectly with this Garmin Rail Mount adapter (LARGE) being reviewed here. This rail mount adapter (large) allowed me to mount it on the handlebar of my mountain bike, which has a 31.9 mm diameter. In fact, if you have any modern mountain, then buy this rail mount adapter and NOT the one that Amazon suggests to bundle together with the etrex vista - specifically the Garmin eTrex Handlebar Mount Bracket, since the maximum handlebar size that this suggested mount can work with is a skinny 25.4mm handlebar. So, if you want to mount your GPS on your stout mountain bike handles, then buy the Garmin Rail Mount adapter (LARGE)Oh yeah - the fit is snug and solid and doesn't rattle around while you are riding the trail, path, or those mean streets.
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