All right, I know I'm probably going to get flamed for this post but I've done my searching and have read a ton of threads about it.

There seems to be mixed sentiment about using a rubber/metal grommet or just putting in a Presta tube and not worrying about it. None of my LBS seem to carry the grommet to narrow the hole so I'm stuck either buying online without seeing it or going without one.

My question is which do you all recommend? The only reason I want to put Presta in my tires is because when I bought my bike (used), the previous owner had already put one Presta tube in the bike (with no grommet) and the front tube is still a Schrader. He also gave me a spare new Presta tube he had lying around.

Also, the only grommets I can find online are the ones on Nashbar. However, on the Amazon reviews one reviewer states that these metal grommets only fit the newer 700c Schrader rims and not the old 27 inch Schrader rims like I have. Here are the links to both Nashbar and Amazon (it's called wheels manufacturing presta saver)

http://www.nashbar.com/bikes/Product...2_208238_-1___

http://www.amazon.com/Wheels-Manufac...8417072&sr=8-1