even if the bike isn't wet, the roads are often a bit damp and mucky, so result in dirty tyres. and some of it's just perception - to a lot of people a bike belongs outdoors, so carrying it avoids anxiety about the floor (even if in reality there's no more danger to the floor than people walking on it).
even if the bike isn't wet, the roads are often a bit damp and mucky, so result in dirty tyres. and some of it's just perception - to a lot of people a bike belongs outdoors, so carrying it avoids anxiety about the floor (even if in reality there's no more danger to the floor than people walking on it).