Wheelbuilding / Wheel Building / Wheel build help

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mattyc in reply to @cycleclinic

Cheers for the info!
I’ve been thinking - I’ve got a pair of Ultegra 6500 hubs laced to Mavic Open Pro SUP rims sat in the shed with very few miles... as I’m on a budget would I be able to swap hubs over for the r45?

Spoke calc says front hubs are near identical - rear spokes are:
R45 - 295.5/294
Ultegra - 297/295.1
Will the 1.5mm difference on the nds cause death and flames if I spend this evening swapping the hubs over? (Then have them tensioned and trued at LBS)
Cheers,
Matt

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cycleclinic in reply to @mattyc

Rear hub flange diameters are too different. New spokes should be used. 1.5mm difference is quite a bit and risk is spoke failure at the nipple. The op rim is not stiff and flex combined with spokes that are too short may cause unhappiness.

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mattyc in reply to @cycleclinic

Been away for a bit, sorry to drag this up again but in this case the spokes I plan to reuse would be 1.5mm longer than spoke calc says is needed... is this still a no?
Thanks in advance,
Matt

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