Cycleway town
Join Date: Jul 2014
Location: Milton Keynes, England
Posts: 1,402
Bikes: 2.6kw GT LTS e-tandem, 250w Voodoo, 250w solar recumbent trike, 3-speed shopper, Merlin ol/skl mtb, 80cc Ellswick
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That's usually a child's wheel, so tubes will typically be quite girthy, and tyre choices can be frustrating.
Not to be confused with 16 3/8 rims, as used by Brompton etc, which have a bead seat radius just 3mm smaller than an 18ins wheel - those tyres and tubes are available in thinner sizes, including popular choices like the Schwalbe Marathon.
Edit - had to correct a figure..
Last edited by MikeyMK; 10-22-19 at 03:03 AM.