On a D3 they are needed to clear the calliper as the offset is different, not sure on a D4 as I run 30mm spacers on mine, I'd imagine they are though Altox GSM FBH controller thread
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30th Nov 2016 3:37 pm
Paul from Freel2.com
Member Since: 04 Dec 2012
Location: Ghent
Posts: 39
There's still a small gap between calliper and rim (4 mm ?) so if that was the reason for the spacer, there's no need for one on the D4.
And I find they look nice on a D4.
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