Can you substitute 235 75 R15 tires with 235 70 R15 tires?

Yes, you can substitute 235/75 R15 tires with 235/70 R15 tires, but there are some considerations. The 235/70 R15 tires will have a slightly smaller overall diameter, which may affect your vehicle's speedometer accuracy, ride height, and handling characteristics. It's important to check your vehicle's specifications and ensure that the new tires won't cause any clearance issues. Always consult a professional if you're unsure about tire compatibility.