Here's what I charge at my shop.
Front tire-$40 Most all bikes
Rear tire-$50 Most all bikes
Rear tire on single sided swingarm-$30
Harley rear-$60-$75
1000-1500 Goldwing rear-$75-$100
Customer brings wheel in-$15
Add $20 for any internet tire.
I will mount darkside tires for the same price with one exception. If it's a 15" car tire, I will mount the tire, but the customer has to take it somewhere else to put air in it. A 15" car tire is smaller than a 15" MC tire and I'm not going to have it blow up in my face.
There are a lot of things that can cause the price to go up.
Frozen axles, frozen brake calipers, aftermarket exhaust, axle end covers with stripped screws,
trailer hitches, all those little stick on lights in the way, stripped nuts and bolts, rusted rims, etc, etc.
Internet tires are $20 higher because liability ins. for a motorcycle shop is very expensive and the internet tire seller gets to make all the profit on the tire sell, while I have to assume all the Liability. I had to buy a new tire changer last year and it has to be paid for.