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Shaynus

Wheel Size / Measurement

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G'day All

When manufacturers give wheel sizes, for example  say 16.8 x 8.5, is the diameter the central rib (bigger diameter) or the outer "rim" (smaller diameter) size?

Cheers,

Shaynus

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Shaynus,

Typically, the diameter dimension given is the visible rim after  tyre is fitted.

However, be aware that manufacturers usually don't quote bead/rib height or bead/rib width.

Don't assume that a tyre will fit just because it has the diameter and width you are looking for.

It is possible to stretch tyres somewhat, but if you use air hubs, a tight tyre will sink into the airwell, ruining the contact patch.

 

Hope this helps.

Alan W

London

 

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That's what I thought, thanks for the confirmation Alan.

Yes, I wish there was more info on the wheel 'shape' (rib size) on a lot of sites.

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All the wheel dimensions I've seen are total diameter including centre ridge.

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bram1_zpsfkhrhndv.jpg

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4 hours ago, Wobble said:

All the wheel dimensions I've seen are total diameter including centre ridge.

Wobble is correct !!,............stated wheel diameters (on wheels with a ridge) include the center ridge.

 

Cheers

Chris Walker

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This is Slot.It wheel coding as an example:

slot-it-wheel-code.png

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Print It, Build It, Race It, Improve It, Repeat...B)

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