Road there is bad. It is like you get somewhat clean road for a few hundred meters and then completely dirt laden track for next few kilometers. The first 100km stretch from Dasu to chilas demands very careful driving.
We covered 130km in around 4.5 hours. Which means that our average speed was around 24km/hr throughout this time. We just couldn't drive faster there.
We were lucky in the sense that whole road stretch was clear and there was no landsliding. Secondly, thankfully weather was not rainy and we didn't find any mud tracks to navigate through.