View Full Version : Handlebar size?

07-30-2014, 03:46 PM

How do I figure out the handlebar size on a bike? I'm trying to replace the bars on an early 90's Novara Strada. I found the type of bar on bikepedia, but can't figure out the size. Help!

07-30-2014, 05:26 PM
Do you mean the clamp size or width? Drop bars? Quill stem or threadless?

07-30-2014, 05:47 PM
Do you mean the clamp size or width? Drop bars? Quill stem or threadless?

Drop bars. I'm looking for clamp size. I believe quill stem, but I had to look up the term, so it's not something I remember off hand.

07-30-2014, 09:19 PM
Use a caliper?


07-30-2014, 09:33 PM
I'd guess 26mm, but it could be 25.4. Others can correct me if I'm wrong, but if there is a stem/bar mismatch between those two sizes, you should still be able to make it work. Does your stem look something like this?


07-31-2014, 08:28 PM
Yep - post a picture of your existing stem / bar and someone may be able to help you.

Harry Meatmotor
08-01-2014, 06:06 AM
If you can't figure out what size it is (either 25.4mm or 26.0mm) you can pick up a 25.4mm h-bar, as well as a 25.4 to 26.0 shim.

08-01-2014, 04:22 PM
Option #1: Go to a bike shop and ask them to measure it for you.

Option #2: Buy a digital caliper, like this (http://www.lowes.com/pd_293883-16878-53247_0__?productId=1242475), or this (http://www.homedepot.com/p/General-Tools-Fraction-6-in-3-Mode-Digital-Caliper-147/100651811), or this (http://www.amazon.com/Neiko-01407A-Extra-Large-SAE-Metric-Conversion/dp/B000GSLKIW/). They are accurate to 0.02 mm depending on which one you buy. If you want to buy a manual one, see this video (https://www.youtube.com/watch?v=FNdkYIVJ3Vc) about how to use it.

Option #3: Measure the circumference, then divide by PI. You can use a measuring tape, or wrap a narrow piece of paper around it and mark it. This gives a more accurate result than trying to measure the diameter directly.