Different Mountain Bike Valves

Road bike valve stem type?

My new Trek 1000 has a type of valve stem different from the “standard” (car type) stem on my mountain bike. Do I need an adaptor to fit it to a pump or do I need a whole new pump? Also, have you seen a tire gauge that fits this stem type?

It is called a “presta” valve. Remember that because you’ll need to know it when you buy new tubes.

Buy an adapter at the store for $1 that will allow you to use your existing pump. I usually carry it in my underseat pack, just in case.

To fill, you need to remove the black dust cap, then unscrew the little knob at the top of the stem. Then screw on the adapter and inflate like you would a normal tire. When you’re finished, don’t forget to screw the little valve back down.

Many new tire pumps will fit both types of valves so if you get sick of the adapter you can buy a new pump. I’ve been very happy with my Hurricane team pump.

http://www.performancebike.com/shop/Profile.cfm?SKU=19979&item=40-2176&slitrk=search&slisearch=true

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