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25mm I thermal width is for 40mm wide tyre or wider ideally and then with a tyre that wide why pretent to have an aero wheel. Your just pretending.
LB are making these rim to fit 28mm schwalbe pro one which will be stretched to 33mm wide and the crown will be too flat and the tyre squares on more quickly. Asquared of tyre created more aero drag. Tyres are designed around a rim internal width range where they have the right shape and the right shape is whatever the tyre manufacturer intends. Modern road tyres are designed around 17 to 19mm internal widths gravel tyres need a wider rim of approximately 19 to 22mm internal width. 25mm is really meant for 2.0 to 2.4" tyres.
That is the flaw in these rims. They make no sense for the tyres that should be used on them and the tyre people want to use on them are not designed/manufactured for them.
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cycleclinic
chiroshi
Because that's basically what a 50mm deep, 25mm internal rim is! I didn't say there was a need for one.