qwerty
Club Retro Rides Member
Posts: 2,410
Club RR Member Number: 52
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Offset Calculationqwerty
@qwerty
Club Retro Rides Member 52
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Looking at some new wheels.
9" wide. 6" Backspace 3" Dish. Whats the offset?
Thanks in advance!
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RobinJI
Posted a lot
"Driven by the irony that only being shackled to the road could ever I be free"
Posts: 2,995
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Should be +38.1mm
(backspace minus half the width)
Edit, that is assuming both measurements are taken from the same point, if the backspace is measured from the outer edge of the lip (rather than inside edge of the lip where the bead sits, which is the traditional point for measuring width), then it may not work, and we'd need to know how thick the lip is.
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Last Edit: Apr 7, 2012 19:51:09 GMT by RobinJI
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qwerty
Club Retro Rides Member
Posts: 2,410
Club RR Member Number: 52
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Offset Calculationqwerty
@qwerty
Club Retro Rides Member 52
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Hmmmm.......Thats quite a high offset. Might need spacers
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Took me so long due to tired child needing to go to bed!
I'll add something though, if its 9" bead to bead (most measurements stated by manufacturers are) then its nearer 10" wide bringing offset down to 25mm.
I would check how its been measured before buying.
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1977 datsun 810 180b estate |
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As stated above Rim width cannot equal backspace + "dish". Stated rim width is between beads and backspace is to the extremis of the rim. These could therefore be 8" rims et38(.1)
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