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Road vs mtn bike stems(4 posts)

Road vs mtn bike stemsChrisA
Apr 8, 2001 4:11 PM
Are the clamp diameters of road bike and mtn bike stems the same (excluding the oversize road bike stuff - ie. Newton)? I want to use a stem with a 5 degree rise on my road bike and all of the road bike stems I see are -17 or -10. I'd even take a zero rise stem. Any help is greatly appreciated.
not the same...dave
Apr 8, 2001 4:52 PM
Road bars are 25.8mm, or 26.0mm depending on brand. MTB stems are 25.4mm (1 inch) diameter. I'm sure people have squeezed road bars on to MTB stems, but it's not a great idea.

90 or zero degree road stems aren't that unusual. Nearly any mail order catalog has at least one or two models.

Also note that an 80 (or-10) stem, flipped over creates a 10 degree rise.
not the same...Spoke Wrench
Apr 9, 2001 6:07 AM
There are also a few road bars made in the 25.4mm clamp diameter. Nitto makes bars in a variety of widths and reaches that should retail for between $25.00 and $30.00.
no, but...DaveG
Apr 9, 2001 3:51 PM
As the others stated Mtn handlebars are normally 25.4, although Sakae and others do make 25.4 road handlebars. Taking a quick look at the Colorado Cyclist catalog I see:
Profile H20 - 0 deg
Salsa - +5 deg
Also, you can usually flip over a negative rise stem to get major rise, so the Ritchey stem could yield +7 deg if flipped.