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It would difficult to say whether 3000 is normal as it depends so many variables.. Tpe of tyre how the bike is used for example any tyre will square off much faster if a lot of motorway is used. There is also how the rider rides fast acceleration and heavy breaking will wear a tyre much faster. Another factor is if the rider checks and adjusts the pressures regulary or not. My comment reference not comparing it with car tyres comes from comments from friends who drive but do not ride

I have the original Dunlop and at 6500 miles, front tire is approaching the limit, 1.5mm mark, but the back is still far, around 3.5mm compare with the 2mm limit. Just ride normaly and at every 500 miles measure them and in this way you will figure it out how much will last

My OEM Z8 tyres lasted 15,413 mi because of the bad Greek asphalt, which has the grip of an oil spil... The wear was still minimal but the grip was awful (from day 0) and they were squared... I guess they could give 10.000 mi more but full of compromises... I replaced them with Bridgestone S21 (sport) for more grip and I expect the same mileage as a touring tyre on Britain...

The road surfaces will have a marked influence on wear rates too, you often find mountain roads can be a lot more abrasive than lowland ones. Like Simon I binned the original Metz Z8 tyres at around 5k miles because I didn't like how the front was wearing (triangular) and it spoilt the ride. The first PR4 rear was changed at around 8k miles because I was about to go on a long tour and didn't want a worn out tyre at the end, it would have been good for 10k miles quite comfortably. The front was changed at about 13k, again tread left but the feel had gone off. The second

Stephen, Rocker doesn't drive a car and I don't imagine he knows what tyre wear would be like on one, other than 'much less than a bike'. I replaced the standard (Bridgestone) tyres at 4,000 miles. The front had worn into a weird 'triangular' shape and was affecting the steering (and my enjoyment of the bike). I normally change tyres (always as a pair - never individually) around 5,000 miles because they will be worn enough to have lost their 'edge'. Motorcycle tyres work a lot harder than car tyres and the effects of wear are far more pronounced. Some folks can shrug

Mechanically there shouldn't be any issues. Usually really high mileage bikes die due to general deterioration due to salt corrosion etc. Deauvilles will happily do 150k plus miles, I'd be surprised if the NC is much different. If you intend to run it to high miles, keep on top of the routine servicing, change fluids regularly (including coolant, fork oil and brake fluid), and keep it protected with suitable products like ACF50 etc. Fork gaiters would be a worthwhile addition, plus a shock sock is essential. Service the brake calipers regularly to avoid corrosion, red rubber grease r