Polo Bikes

I'd be surprised if the dropouts came as standard in 14mm.
Swapping a hollow axle for a solid one, the ease with which you can do this will probably vary from hub to hub.
Whilst disc hubs will have less distance between the flanges than the equivalent non-disc hub, I would guess that the difference between a 135mm disc hub and a 120mm track hub will be negligible.

Thanks for your help. So, in conclusion then, a 135 spacing so I can use MTB hubs/wheels is fine. There shouldn't be any comparability issues.

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