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Re: [Phys-L] bike wheel handles

Consider your audience. For those with short arms I find the smaller 20" wheels work much better. Avoids chaffing of the chin with the tire. If you get good bearings so the wheel turns smoothly I find the gyro effect is very noticeable. A weighted wheel would help but is not really necessary.


On May 26, 2013, at 12:00 PM, wrote:

Message: 2
Date: Sat, 25 May 2013 15:59:48 -0700
From: Bernard Cleyet <>
Subject: Re: [Phys-L] bike wheel handles
Message-ID: <>
Content-Type: text/plain; charset=us-ascii

On 2013, May 25, , at 07:20, John Denker <> wrote:

Note that axle pegs are characteristic of BMX bikes, which normally
have 20 inch wheels ... but for typical angular momentum demos you'd
rather have something larger. I recommend 700 mm road-bike tires.

Size less important if one uses a liquid or solid instead of a gas to fill the tyre.