• 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

  • If the Ultegra/Mavic wheels have been rounded down to 296/294, you may get away with it. If not, I wouldn't reuse them.

  • 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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