Thanks for all the comments. Regarding the tyres, I looked into getting chunkier ones today, but as the wheels are 20" the clearance in the arches could be an issue I'm now thinking about selling them and going for a smaller set.
Thanks for all the comments. Regarding the tyres, I looked into getting chunkier ones today, but as the wheels are 20" the clearance in the arches could be an issue I'm now thinking about selling them and going for a smaller set.